6.1 Technical Plan for Cultivation Facilities

6.1.1 Construction Purpose: A new farming method that gets rid of dependence on the natural environment for effective production and improves land utilization, labor productivity, and agricultural products. quality and economic benefits.

6.1.2 The types of gardening facilities are divided into: plastic greenhouses, multi-span greenhouses, and energy-saving solar greenhouses. Multi-span greenhouses have high investment, high energy consumption, and long investment recovery time, and are not suitable for our current development situation. Therefore, our company currently does not build or build less, mainly plastic greenhouses and solar greenhouses.

6.1.3 Plastic greenhouse construction:

(1) Plastic greenhouses are mainly used for early spring and delayed autumn cultivation. Our company adopts a bracket-free steel tube greenhouse design plan, running north-south, with a span of 8 meters, a shoulder height of 1.6 meters, a ridge height of 2.8 meters, a shed length of 60-80 meters, a design life of 15 years, and covered with drip-free thermal insulation and anti-aging film.

(2) Semi-underground honeycomb greenhouses are mainly used for early spring, late autumn and off-season cultivation of cool-loving vegetables in winter to achieve annual vegetable production. Running north-south, the distance between the sheds is 1.8 meters. Digging 0.5 meters into the ground to build a 1-meter-high wall. Drill heat-absorbing holes in the wall according to 40*40. The span is 8 meters, the shoulder height is 1 meter, and the ridge height is 2.8 meters. It is constructed of steel pipes. There are no brackets in the greenhouse, and it is covered with double films

(3) Semi-underground honeycomb type pillar-less steel frame energy-saving solar greenhouse, based on the incident angle of sunlight and the altitude angle of the sun (winter solstice) at our latitude (33 degrees) Design: The greenhouse span is 8 meters, the lighting angle is 23 degrees, the rear slope elevation angle is 42 degrees, the ridge height is 3.2 meters, the back wall is 2 meters high (including the depth of digging), the depth of digging is 0.8 meters, and the shed length is 60-80 meters. Sit north and face south 5 degrees west.

6.2 Control technology of facility environment

6.2.1 Control of lighting conditions

(1) Build a facility with reasonable structure, strong light transmittance, fast heating, Greenhouse facilities with good thermal insulation and easy management;

(2) Remove the straw curtain in time to extend the lighting time; wipe the film in time to maintain the light transmittance of the lighting surface;

( 3) Hang reflective films and lay reflective films on the ground; implement cultivation in north-south rows and wide and narrow rows;

(4) Adjust the planting structure and density; improve the photosynthetic efficiency of the crops themselves and select appropriate varieties.

(5) Add lighting facilities (metal halide lamps) and perform artificial supplementary light.

6.2.2 Insulation and anti-freezing scheme

(1) Enhance light transmittance, cultivate with ridges, cover with mulch, and seal tightly to eliminate gaps for heat dissipation;

(2 ) Increase the total amount of thermal insulation of the covering and add heating equipment;

6.2.3 Control of air humidity in the facility

(1) Cover the entire area with mulch film to scientifically increase the temperature difference between day and night Ventilation and moisture removal;

(2) Scientific irrigation;

6.2.4 Air quality control and scientific fertilization

(1) Open air vents for ventilation in a timely and appropriate amount

(2) Apply more organic fertilizer to prevent soil salinization;

(3) Install an EFQ-40 carbon dioxide generator to increase the application of carbon dioxide and control it.

Amount 1000-1500hg/㎡

6.3 Technical Regulations for the Production of Organic Vegetables

6.3.1 Technical Regulations for the Production of Organic Cabbage, Sedum Panax notoginseng, and Yangxin Tea

(1) Variety selection: Chinese cabbage

(2) Deeply plow the soil 3 to 5 days before soil preparation for border planting. Apply 2500 kg of decomposed organic fertilizer every 667 square meters before deep plowing. Make a trench in the middle of the cultivation row and apply potassium ore powder and phosphate rock, 25kg/667 m2 each, with a furrow width of 1.4 m and a furrow height of 25 cm. The furrow is required to be straight and the ditch is smooth to facilitate drainage and irrigation.

(3) Seedling cultivation and planting

Seedbed preparation requires 4 ㎡ of seedbed for every 667 ㎡ of cultivation area. The seedbed should be selected in a place that is convenient for management and convenient for the transportation of vegetable seedlings. The seedbed should be selected with relatively low terrain. Loose vegetable garden soil that is high, has good water conditions, has few weeds, and has high organic matter content.

The seedbed should be leveled and thinned, with a bed width of 1.3 m and a height of 0.3 m. Apply 30 kg of decomposed human feces and 1 kg of calcium and magnesium amendment every 10 to 13 days before sowing.

Carrots should avoid strong light and long sunshine. In autumn, cabbage seedbeds should be placed in a ventilated, shady place or use a shade net to raise seedlings. When spring cabbage is sown and the daily average temperature is below 5°C, it needs to be covered with plastic film to keep it warm.

Germination. Before sowing, the seeds can be soaked for germination, or dry seeds can be sown. For seeds that have been soaked and germinated, special care should be taken when sowing to prevent the buds from being broken. When raising seedlings in summer and autumn, it is difficult for lettuce seeds to germinate due to hot weather, so they should be germinated first and then sown. The method of germination is generally the low temperature germination method. Soak the cabbage seeds for 5 to 6 hours, wash them clean, wrap them in a wet cloth bag, and place them at 15 to 20°C for germination.

Sow seeds at the right time. To plant cabbage in an area of ??667 square meters, you need to prepare a seedbed of 12 to 15 square meters, and the seed amount per 667 square meters is 150 to 250g. After the seedbed is watered, the seeds are evenly spread and covered with 1 to 1.5 cm of fine soil. Generally, the sowing period for cabbage grown in greenhouses in late autumn should be in mid-to-late August, and the harvest period is from late November to December. Before sowing, the seedbed should be watered thoroughly, mix the seeds with dry fine soil, and spread evenly in the seedbed. After sowing, cover with fine soil so that the seeds are not exposed to the soil surface.

Cultivation of strong seedlings. Fifteen days after the seedlings are unearthed, thinning is carried out when the seedlings have 2 to 3 true leaves, and the spacing between plants and rows is 5-6 cm. Remove diseased and weak seedlings and overcrowded seedlings. It is appropriate to leave 1,200 seedlings per m, which is beneficial to the cultivation of strong seedlings. After thinning, fertilize in time and apply livestock and poultry manure and compost. In seasons with heavy rainfall and high temperatures, protective measures such as rain protection and sunshade are required. The seedbed temperature is controlled at 18-20℃ during the day and 12-14℃ at night. The seedlings are 20 to 30 days old. The seedlings can be transplanted and planted when there are 4-5 leaves of cabbage in autumn and 5-6 leaves of cabbage in spring.

The seedbed should be watered 1 to 2 days before planting to facilitate seedling emergence. Choose a cloudy day or in the afternoon, take the seedlings with soil, avoid damaging the root system, make the soil lump flush with the ground, and plant the seedlings straight and evenly. If covered with mulch, seal the planting holes with soil after planting. Water in time after planting to help slow down the seedlings. A three-row area is used for planting, with a plant-row spacing of 40 cm × 35 cm, and 3,000 plants planted in 667 m2. Pour root water promptly after planting. 3 to 5 days after planting, seedlings should be checked and replenished in time.

(4) Field management

Principles of fertilization in organic cabbage production. Fertilization in organic cabbage production must adhere to the principle of using organic fertilizer as the main base fertilizer and top-dressing chemical fertilizer as a supplement. Implement soil testing, formulated fertilization and balanced fertilization, and comply with the technical requirements for organic product production. Organic fertilizers should be harmlessly treated and fully decomposed before application to prevent contamination of soil and agricultural products.

Top-dressing: After the seedlings survive, they should be top-dressed in time. Apply 2000 kg of 10% decomposed human feces every 667 m, and then apply 100-200 kg of livestock and poultry manure and compost every 10 to 15 days in conjunction with irrigation. Water 3 to 4 times, and spray 0.3% borate rock extract once on the leaves during the seedling stage and rosette stage.

Irrigation and cultivating Irrigation is combined with fertilization. Water needs are different in different periods, and the irrigation methods are also different. Alternate dryness and wetness to prevent seedlings from aging or becoming leggy; irrigate before and after evening in autumn and winter. During rainy spring, attention should be paid to removing accumulated water in the field to keep the border dry. Irrigation water for organic cabbage production must use clean water sources, and various indicators of irrigation water must comply with national irrigation water standards. After the seedlings are established, cultivating and weeding should be done once with the first top dressing. During the growth period, cultivating and weeding should be done 2-3 times. Cultivating should be stopped in the later period.

(5) Pest and disease control

The main pests and diseases of cabbage include downy mildew, stem rot, sclerotinia, aphids, etc.

Natural products can be used Pyrethrum, neem, rotenone, vegetable oil and its emulsion, neem tree extract (Neem) and its preparations, etc. are used for prevention and control.

(6) Harvest

The optimal period for harvesting cabbage is "flat mouth", that is, the top of the main stem of cabbage is level with the tip of the tallest leaf. At this time, the young stems have grown long, not only have high yields, but also have high water content, crisp texture, sweet and delicious taste, and good quality and marketability, so they should be harvested in time.

If harvested too early, the yield will be low. If harvested too late, the flower sprouts will easily elongate, the fiber will increase, and the meat will become old, hard, or even hollow, which will reduce the food quality and product quality. When harvesting, use a sharp knife to cut flatly from the base of the stem and remove the leaves at the base of the stem, leaving the top 5 to 8 leaves, which are bundled and graded according to size and thickness.

6.3.2 Technical regulations for the production of organic leeks and leeks

(1) Variety selection Tongshan Four Seasons Leek King.

(2) Sowing at the right time Only by sowing at the right time can leek sprouts obtain high quality and high yield. In terms of climatic conditions, it is appropriate to sow leek in autumn when the daily average temperature reaches 20-22℃. It can grow 6 to 8 leaves before overwintering.

(3) Reasonable and dense planting. In view of the characteristics of leeks, which have a long growth period, require a lot of fertilizer, have shallow root systems, and have weak root absorptive capacity, fine soil preparation is required before sowing, and sufficient basal fertilizer is applied. 667㎡ of fertilizer is applied one week before sowing. 5,000-8,000 kg of fully decomposed farmyard ash or compost, 100-150 kg of cake fertilizer, 25 kg each of phosphate rock powder and potassium rock powder, plow the soil deeply and mix thoroughly. When sowing, stick to the furrow and place the seeds along the border. The furrow depth is 4 to 5 cm. In principle, the density is determined based on the size of the garlic seeds, soil fertility, and the time of sowing. For leeks, if the soil is fertile and the seed is sown early, it can be appropriately thinner, and vice versa. Under normal circumstances, for pure-breeding fields or long-term corn interplanting fields, the row spacing is 10cm, the plant spacing is 3cm, and about 60,000 plants are planted in 667 square meters; for cotton intercropping fields, the row spacing is 8 cm, and the plant spacing is 3cm.

(4) Field management

Rational fertilization should adopt the strategy of "stabilizing phosphorus, controlling nitrogen, and increasing potassium" in the total amount of fertilizer applied. Base fertilizer accounts for 70% of the total fertilizer amount. . On the basis of applying sufficient base fertilizer, top-dressing fertilizer should be carried out according to the principle of "light application of seedling-boosting fertilizer, skillful application of green-returning fertilizer, heavy application of bolting fertilizer, and supplementary application of head-stimulating fertilizer". Seedling fertilizer should be applied at the 2-3 leaf stage. At this time, leeks have entered the autotrophic growth stage. Depending on the seedling condition, 1,000 kg of decomposed manure can be poured into 667 square meters of water; green fertilizer should be applied in mid-February, when When the temperature gradually rises and the leeks are about to start to turn green and grow, topdressing is applied. Generally, 150-2O0 kg of livestock and poultry manure and compost is applied to 667 square meters. For fields with insufficient base fertilizer, 200-300kg is applied to 667 square meters. Ditches are dug to concentrate and apply bolting fertilizer deeply. In mid-March, topdress the leek sheath leaves (the last leaf) when they first show their tips. Generally, 24O-30O kg of livestock and poultry manure and compost should be applied to 667 m to meet the bolting needs. At the same time, it is necessary to improve the field water system to ensure that drought can be irrigated and waterlogging can be drained, so as to meet the water needs of leeks in different growth stages.

Timely cultivating and weeding is mainly carried out in two stages: First, from the 3-leaf stage to the "big cold", it is advisable to carry out two cultivating operations with a depth of about 2 cm in this period to promote root penetration and cultivate strong seedlings. . The second is to carry out 3 to 4 times of cultivating with a depth of 1 to 1.5 cm from the "beginning of spring" to the "vernal equinox". Cultivating requires no damage to roots, no damage to seedlings, and no weeding. After the Qingming Festival, cultivating and loosening the soil should be stopped to prevent damage to the root system and affect yield. If there are weeds, they should be pulled out manually.

Comprehensive prevention and control of pests and diseases At present, the main diseases and pests in leek production include "one pest and two diseases", namely leek maggots, leaf blight, and yellow spot. In terms of prevention and control, we must adhere to the strategy of “prevention first, comprehensive prevention and control”. For the prevention and control of leek maggots, organic fertilizers should be mainly used and must be fully decomposed. Neem tree extract (Neem) and its preparations can also be used; natural pyrethrum (Pyrethroidaceae plant extract); Neem (Squaramaceae plant extract); Rotenones (hairy rotenone) and other control. To prevent and control leaf blight and yellow spot disease, we must implement good crop rotation, clarify the field water system, sow at the appropriate time, increase the application of phosphorus and potassium fertilizers, and strengthen field management to cultivate strong plants.

(5) It takes 20 to 25 days to harvest when the leek sprouts start to differentiate and be harvested. The growth is slow in the early stage and accelerates after tail flicking. When most of the leek sprouts in the field are taken out about 25 cm, the total When the bracts turn white and the leeks begin to bend, they should be harvested in time. If the leek sprouts are harvested too early, the yield will be low; if they are harvested too late, they will have more fiber and poor quality. Generally, it is harvested in mid-March. The neatly grown leek sprouts can be harvested in 1 to 2 times. Watering should be stopped 10 days before picking the leek sprouts to properly loosen the leek sprouts from the leaf sheaths, making it easier to harvest the leek sprouts.

How to pick the sprouts: Lift the sprouts with both hands. It is strictly forbidden to use a knife to score, cut or shovel the sprouts. Simple packaging: tied with soft rope, 0.5~1.0kg per bundle, tied and placed in a cool place.

6.3.3 Technical regulations for the production of organic okra

(1) Variety selection

Select varieties with strong stress resistance, wide adaptability, good commercialization, high yield and high quality. Do not use genetically modified okra varieties that are storage-resistant and mid- to late-maturing varieties.

(2) Seed treatment

Place the seeds in warm water at 30 to 40°C and stir for 15 minutes. Remove the bruises, soak in warm water for 5 hours, and then rinse with clean water.

(3) Seedling cultivation

Sowing date The sowing date is determined based on the time when the curds are on the market and the different varieties selected.

Preparation of nutrient soil: Use 7 parts of fertile field soil that has not been planted with cruciferous crops in 3 years, and 3 parts of high-quality manure that has been fully decomposed by high-temperature fermentation and sieved. For every cubic meter of nutrient soil, add 1.5 kg of phosphate rock powder or potassium rock powder and mix evenly. Use a nutrient body of 8×10 cm, place the nutrient bowl in the seedbed, pour enough water, cover it with a layer of fine soil after the water seeps out, and put 2 seeds in each bowl. Sowing is during the hot season, so use sunshade nets to shade the fields, and install rain-proof and insect-proof facilities. After the seedlings emerge, remove the cover in time, then spread fine soil to fill the cracks, and time the seedlings. The seedlings are about 30 days old and can be planted when they have 5 to 6 leaves.

(4) Planting: Apply 4000 to 5000 kilograms of high-quality decomposed fertilizer per acre, plow 20 centimeters deep, turn the fertilizer into the soil, and then make high ridges. When planting, choose strong seedlings. The criteria are: thick stem nodes, thick leaves, dark green color, well-developed root system, large plants, and no pests and diseases. Apply 20 to 25 kilograms of phosphate rock powder or potassium rock powder to the holes per mu, with a density of 2500 to 2500 to 3000 acres. After planting, pour sealing water and seedling slowing water.

(5) Field management

Water management: on sunny days after planting, water once in the morning and evening to promote survival; in the early growth period after survival, water once a day on sunny days . Plants require a lot of water and require the soil to be kept moist. In case of drought, they should be filled with horse water. Avoid soaking or flooding. Ditches should be dug for drainage to prevent water accumulation in the fields on rainy days.

Apply top dressing frequently, especially for early-maturing varieties, to promote the early vegetative growth of the plant. Since this variety has a short growth period after planting, it can be harvested about 60 days after planting. Therefore, it is necessary to ensure that it grows strong Tall plant shape requires top dressing to promote growth first and last till the end. After slowing down the seedlings, use dry farmyard manure and dehydrated livestock manure for top dressing; during the rosette stage, use plant ash, livestock and poultry manure and compost, and topdress with water;

Cultivate soil and cover the border with grass, usually every day. Before the second fertilization, cultivating and loosening the soil, cultivating and weeding 2-3 times before sealing the rows of the plants, and cultivating the soil after the last cultivating and fertilizing. The height of the soil should be controlled to 2 cm below the base of the petiole. This will prevent the plant from lodging easily and promote the germination of adventitious roots in the rhizome. , cultivate a strong root system. Make the main stem strong and increase yield. Covering the border with grass after cultivating the soil can effectively reduce the soil temperature in midsummer. Maintain soil moisture, reduce soil erosion and the growth of weeds, loosen the soil and increase the organic matter content in the soil. When laying grass, the grass should be cut before drought or straw, wheat straw, etc. should be used to spread the grass on the border surface.

To prevent and control pests and diseases, you can use neem tree extract (Neem) and its preparations; natural pyrethrum (pyrethrum plant extract); neemine (quaspermaceae plant extract); rotenone (hairy fish) Vine); Sophora flavescens and its preparations, etc. control pests such as diamondback moth and cabbage caterpillar.

(6) Harvesting standards: Harvesting begins when the plants are fully developed and grown. In order to facilitate transportation and prevent scratches and rot during transportation, the surface is wrapped with soft paper and packed in boxes for transportation.

6.3.4 Technical regulations for the production of organic peppers, tomatoes, and other vegetables and off-season vegetables

(1) Variety selection should be based on consumption habits and select marketable high-yield, high-quality, medium-sized vegetables. Light and heat-resistant varieties.

(2) Sow seeds at the right time. Peppers and tomatoes are not frost-tolerant and are afraid of high temperatures, so the planting time in autumn should be controlled to avoid the hottest period.

(3) Reasonable and dense planting. The growth period of peppers and tomatoes is shorter than that in spring, their growth potential is weaker, and there are fewer fallen branches. Appropriately increasing planting density will help increase yields.

(4) Field management

Top dressing for cultivating and top dressing Top dressing should be combined with cultivating and weeding. Top dressing should be based on the principle of applying less before flowering, more after flowering, and more during the peak period of pod formation, from light to thick, usually 3 times. The first time at the seedling stage, apply decomposed light human and animal manure water. The second and third times apply 30% manure water at the peak and late stages of pod formation respectively, and add 10 kg of superphosphate per mu. In the early days of winter, pay attention to watering to resist drought. For plots with excessive growth or poor ventilation, old leaves, yellow leaves or multi-generation leaves can be removed to increase the pod setting rate and reduce deformed pods.

Ventilation and light transmission promote flowering and pod formation. It should be done in the afternoon to prevent the vine stems from being easily broken due to excessive water content.

(5) Pest and disease control

The main cultivation diseases include rust, anthracnose, and root rot; the main pests are pod borer and bean field borer. High-temperature and humid pod borers cause serious damage, and high-temperature and dry pod borers occur more frequently. Prevention and control methods: Remove insect pods and larvae in a timely manner, and set up black light lamps in bean fields to trap and kill adult insects. Spray buds and pods with 1000 times of Bt emulsion or 2000 times of 5% Bt emulsion from the early flowering stage to the full flowering stage.

(6) Harvesting at the right time

6.3.5. Technical regulations for the production of organic long white wood (thorn shoots, stems and roots, traditional Chinese medicinal materials)

(1 ) Variety Selection

Crimson Landracea (thorny shoots, stems and roots, Chinese medicinal materials)

(2) Seedling cultivation

Seed treatment, Landracea Landracea per 667㎡ The amount of seeds used is 50-75g. Before sowing, soak the seeds in warm water at 50°C for 20 minutes (minutes), stir constantly, take them out and dry them for sowing.

For seedbed preparation, choose a field with high and dry terrain, convenient drainage and irrigation, fertile soil, and a field that has not been planted with cruciferous vegetables in the past three years as a seedbed. Use soil that has not been planted with cruciferous vegetables for 3 years and mix it with high-quality organic fertilizer. The proportion of organic fertilizer should not be less than 30%.

For sowing, the spring white mulberry trees are sown from late September to mid-to-late October, and the autumn and winter white mulberry trees are sown from late June to late August. Seedbeds are drilled or hole sown, covered with soil 1-1.2cm thick and compacted. It is best to use plug trays or nutrient bowls to raise seedlings.

Seedling management: After the seedlings are unearthed and after the seedlings are unearthed, remove diseased seedlings, weak seedlings and miscellaneous seedlings, and cover them with fine soil after thinning. The seedlings of the fake-planted S. edulis have a long life, and it is advisable to fake them 1-2 times during the seedling stage, when the seedlings have 1-2 true leaves and 3-4 true leaves respectively. Transplant seedlings at a distance of 6-10cm. If you use plug trays or nutrient bowls to grow seedlings, you can move them into the plug trays or nutrient bowls when you pull the cross. Field management of summer seedbed sheds and preparation of sunshade nets and films. Use a sunshade net from 10 a.m. to 3 p.m. on sunny and hot days. Water thoroughly every 1 to 2 days (days) in the morning. Use a film to avoid rain on cloudy and rainy days.

(3) Planting

Soil preparation and fertilization require deep plowing and fine raking, without large pieces of soil. Under medium fertility conditions, combined with land preparation, apply 5,000kg of high-quality decomposed pig manure, 90kg of phosphate fertilizer (P205) (750kg of superphosphate), and 90kg of potassium fertilizer (K2O) (180kg of potassium sulfate) per mu. Build a high border with a border width of 1.4-2m, a border height of 15-20cm, and a furrow width of 40-45cm.

Regarding the planting period and density, early-maturing varieties have 6-7 leaves, and mid-late-maturing varieties have 8-9 leaves. The spacing between rows is 10cmx10cm for early-maturing varieties, 10cmx12cm for mid-maturing varieties, and 10cmx13cm for late-maturing varieties.

Fertilizer and water management, watering once immediately after sowing is conducive to full seedlings and strong seedlings. Stop watering 5 days (days) before harvest. During the seedling and rosette stages, the soil is dry and wet, and during the ball-bearing stage, the soil should be kept moist. After the seedlings are planted, apply seedling fertilizer when new roots appear. Generally, thin manure is used, and top dressing is combined with watering once during the rosette stage. Apply nitrogen fertilizer 45kg/hm (97.5k hm of urea) each time.

During the balling period, O.7% calcium chloride can be sprayed 2-3 times to promote balling and prevent dry heartburn.

(4) Pest and disease control

The main diseases of Changbai ash wood include downy mildew, black spot, virus disease, black rot, powdery mildew, soft rot, etc.

The main insect pests of Changbai ashwood include cutworms, grubs, aphids, cabbage caterpillars, diamondback moths, beet armyworms, and Spodoptera litura. Rapeseed caterpillar: 1000 times of Bt wettable powder (about 100 million spores/mL) can be used during the peak hatching period of eggs. Diamondback moth: 1,000 times of Bt wettable powder can be used during the peak hatching period of eggs.

(5) Harvesting

In the off-season of vegetables in early autumn and early spring, when the leaves of Landraceae are properly tightened, they can be harvested and put on the market in time depending on the market demand.

6.4 Pest and disease control technology. Focus on prevention, adopt comprehensive prevention and control methods, establish an early warning mechanism for pests and diseases, use physical, biological, and agricultural control, implement "three avoidance" practical techniques, and purchase insect-proof nets, insect traps, insecticide boards, pyrethrum, quicklime, garlic, etc. , and implement corresponding technologies to use "catalytic nano active water" as a new technology to produce organic vegetables as soon as possible. Through the above measures, we ensure that the quality of vegetable products meets national regulations.

6.5 Organic fertilization technology. Use soil testing formulas and balanced fertilization techniques to meet the normal growth needs of vegetables. Use sterilized sweet potato residue, chaff, mushroom waste, plant ash, and feces as the main fertilizer, supplemented by organic, inorganic fertilizers, and micro-fertilizers to try to block the release of chemical fertilizers. Apply to control soil salinity and minimize nitrite content in vegetables.

6.6 Variety selection. Choosing disease-resistant and high-yielding varieties is an intrinsic guarantee for vegetable quality. It is necessary to speed up the introduction of domestic and foreign famous vegetable varieties for testing and demonstration in the demonstration base, and to select new varieties suitable for cultivation in our county, and to speed up the pace of upgrading of organic greenhouse vegetable varieties.