(1) Rooting and propagation. Branches with roots can be directly dug out and transplanted into the ground during the growing season. Spring and autumn are suitable.
② Cutting propagation. Choose old branches that grow vigorously and have no pests and diseases. Cut into 10 ~ 15 cm long branchlets, each with 3 ~ 4 nodes. The cuttings are obliquely inserted into the bed for about 2 sections, and at least 1 section is buried in the matrix, exposing 1 ~ 2 sections. The cutting substrate can be vermiculite, perlite, mixture of vermiculite and perlite, sand or common soil. Cuttings can be made all year round, with the highest survival rate and quick rooting in spring.
3. Transplanting: Spring and autumn are better, March-April in spring and August-September in autumn. The row spacing and plant spacing are 50 cm and 30 cm respectively.
4. Field management: Generally, fertilizer should be applied once after transplanting or in the greening period of two years, and the second time should be applied from late July to late August. The weather is cold in spring and autumn, and Catharanthus roseus grows rapidly, so topdressing should be done in time to meet the needs of rapid growth. Apply 65,438+00 ~ 65,438+05 kg of ammonium sulfate or 65,438+0000 ~ 65,438+0500 kg of human excrement and urine once per mu, and plough and cover the soil.
5, pest control: black shank disease. Stems, roots and leaves can be damaged, and the damaged parts turn black. Prevention and treatment: At the initial stage of the disease, root irrigation with 400 times solution of 50% carbendazim or 70% thiophanate.
Analysis on how to raise Catharanthus roseus _ Catharanthus roseus Yellow Leaves
The yellow leaf problem of some varieties of Catharanthus roseus (Rishun) is more prominent. Although Chun Er won't fall, it will affect the appearance after all. The yellow leaf phenomenon that individuals have encountered mainly has the following reasons:
1, water yellow
Excessive watering leads to poor root respiration, which is mainly manifested in thin old leaves and yellowish new leaves;
2. Drought and yellow
Long-term watering is not thorough, only the topsoil is wet, which is mainly manifested in the wilting of new leaves and the yellowing and shedding of old leaves;
3, inhibit yellow
This word is my own creation. Common loess is mainly planted, which has high viscosity, poor water permeability and poor air permeability. There is no obvious problem in the seedling stage and growth stage in spring, but after growing into a strong seedling, the root system is developed and deeply embedded in the basin soil. Soil with poor water permeability and air permeability causes poor respiration of its lower roots, which leads to frequent yellow leaves and deciduous leaves, which is most obvious in potted soil in spring;
4. Fat yellow
I once tried to bury the fish intestines directly in the pot, which caused the roots to burn. The main manifestations were slow growth of the whole plant, slow growth, less flowering and smaller petals.
5, basic yellow
Recently, a pot of inexplicable yellow leaves hung in spring, which ruled out the above four reasons. Finally, I found the problem when I changed the pot. The soil for planting it is the soil bought from a flower shop when buying a flowerpot. I didn't look carefully. When changing the basin, it was found that the soil was mixed with a small amount of cement slag (probably the soil made by the flower shop at the demolition site). When tested by pH test paper, the soil pH value is close to 7.0, which exceeds the maximum acceptable pH value of pH6.5 in spring and spring. It seems that the soil alkalinity is too high.
Propagation method and main value of Catharanthus roseus
Catharanthus roseus should not be familiar to all of us, because Catharanthus roseus is only distributed in a few areas, and it is generally difficult for us to see it. So what kind of plant is Catharanthus roseus? What is its important value? Today, Bian Xiao will give you a brief introduction of this situation, hoping to help you. Introduction to Catharanthus roseus:
Before knowing other information, let's take a look at the basic situation of Catharanthus roseus and have a brief understanding. Catharanthus roseus is a creeping semi-shrub, with erect stems and oval leaves. The plant height of Catharanthus roseus is generally about 2-6 cm, which is not very high. Catharanthus roseus is widely distributed in China, including Shanghai, Jiangsu, Hubei and other places.
Growth habit of Catharanthus roseus;
Catharanthus roseus is a plant with strict requirements on its growing environment. Catharanthus roseus is a light-loving plant, which generally grows on sunny slopes in mountainous areas. Catharanthus roseus is a warm-loving plant. The temperature of its growing environment should not be lower than 10 degrees Celsius, otherwise it will freeze to death. Catharanthus roseus has a long flowering period, which usually withers completely in March and May. Its fruit is very small and harmless, but we generally don't eat the fruit of Catharanthus roseus.
Propagation method of Catharanthus roseus:
Now people begin to cultivate Catharanthus roseus artificially. In fact, the method of cultivating Catharanthus roseus artificially is relatively simple. The first thing is to sow. After choosing a suitable planting place, you can sow, and after sowing, you need to cut. Cutting is a relatively technical step, which needs professionals to operate. After cutting, the normal steps such as watering and weeding are very simple.
The main value of Catharanthus roseus:
Catharanthus roseus has two main values, the first is its ornamental value. Because Catharanthus roseus is an evergreen plant, it is good to plant it in gardens or other places for viewing. Secondly, as a greening plant, Catharanthus roseus is a good greening plant because its plants are small and evergreen.
Cultivation techniques of columnar apple
Cylindrical apple can be said to be one of the most popular fruits in China at present, because the shape of this apple tree is different from that of previous fruit trees in the process of cultivation and planting. It is like a thin and long column, but all the apples will grow around this columnar branch, which is why it is named columnar apple. Basic introduction of columnar apples columnar apples taste sweet and sour, have a slight fruit aroma, and have an outstanding appearance. Shanxi Runtai 1 apple seedling is an innovative variety of columnar apple in recent two years, with absolutely top-grade flavor and taste. The nutritional value of columnar apples is also quite rich, and apples themselves are the four major fruits in the world. Cylindrical apples are usually red and belong to low-calorie food. The nutrients in apples are highly soluble and are more easily absorbed by the human body. Vitamin C in apples, in particular, is not only the patron saint of our cardiovascular system, but also helps people to achieve smooth and delicate skin. Eating more apples every day can improve their respiratory system, enhance their immunity and protect their lungs from dust and other injuries.
Key points of columnar apple planting technology
First, the growth and fruiting habits of columnar apples have no natural dormancy period. Under normal circumstances, adult columnar apple trees will have 2-3 growth peaks during 1 year. When planting this kind of fruit, external factors such as environment, soil compactness, soil temperature and moisture are very important.
Second, prune the apple branches. Branches of columnar apples are generally divided into fruiting branches and growing branches. Different types of branches have differences in growth time and ability. With the growth of each apple tree's age, its branches and trees will gradually increase, and gradually there will be many branches and uneven growth. At this time, it is necessary to prune the branches to help the apple tree adjust the operation of nutrients and water, so as to increase its yield and ensure the nutrition of the fruit. In addition, when an apple tree is weak, it can also help the fruit tree to be strong by pruning branches.
Thirdly, the concentration of rare earth applied to apple trees must be adjusted according to strict requirements. Too low a concentration may have no obvious effect. But if the concentration is too high, it will inhibit the growth and development of apple trees and fruits, and may even cause burns, so that the leaves will wither and fall off automatically.
In order to help the rare earth play a greater role in planting, relevant planting workers can mix some neutral washing powder or other foaming agents sold in the market into the rare earth solution before spraying, which can help the rare earth to improve its adhesion.
The time of spraying rare earth is also critical. Choose the time when there is no wind or light wind as much as possible, preferably at 4-6 pm, which can reduce transpiration and help improve the utilization rate of rare earths. In addition, if it rains within 24 hours after spraying rare earth, then supplementary spraying measures should be taken.