Hollow cabbage leaves watered with soapy water turned yellow, can only be rinsed more.

Cultivation techniques for cabbage

Cabbage is a class of both dryland and amphibious plants that can live in the paddy fields, but still more water when the growth is strong, the most suitable for planting in the fertilizer field or livestock barn near the often defecating water in the field. It can also be planted in fertile dry land, and planting in dry land promotes it to bear more seeds, so it can be cultivated in dry land when saving seeds.

Cabbage on the soil adaptability, both fertilizer, and resistant to stains, but also has a certain degree of barrenness, but in artificial cultivation conditions, in order to achieve high yield, to rich organic matter of clay loam or loam cultivation for the most suitable. Cabbage is not drought tolerant.

Cabbage seeds begin to germinate at about 15 ℃, the growth temperature of 20 to 35 ℃, the seed vines axillary buds sprouting at the beginning of the temperature of 30 ℃ or more, sprouting fast. Light to be sufficient, but the adaptability of dense planting is strong, is a short sun type, especially vine water spinach than the son of water spinach on the short sun requirements are more stringent, a little longer than the sun is difficult to flower, fruit, so commonly used asexual reproduction.

Cabbage dry planting and water plant two cultivation methods. The north is mainly dry cultivation; the south dry planting, water planting coexist. Early-maturing cultivation is mainly dry cultivation, and most of the late-maturing cultivation is water planting.

Dry cabbage cultivation technology

(1) seeding, seedling and planting: dry cabbage can be open direct, can also be transplanted seedlings. North China sowing in the canal is generally carried out around mid-April in succession, and can be continued until August. If the use of protective facilities, the sowing period can be advanced. Open field direct seeding using strip sowing or spot sowing, row spacing 30 cm to 35 cm. Spot sowing hole spacing 15 cm to 20 cm, each hole point seed 2, 3. Direct mu seed amount of 10 kg or so, when the seedling height of 3 cm or so can be divided into batches of seedlings, and finally planted at a distance of 15 cm to 20 cm.

The seedling transplantation is mostly done in flat beds, sowing. The amount of seed used per mu seedbed is about 18 kilograms, and can be planted 10 to 15 mu.

The seed coat of cabbage seed is thick and hard, slow to absorb water. Early spring temperatures are low, the emergence of seedlings is slow. In case of low temperature and rainy weather, it is easy to cause rotten seeds, so it should be sown before dipping the seeds (about 24 hours) germination, after sowing, cover the fine soil 1 cm thick, in order to facilitate the seed germination and rooting, and cover the plastic film to raise the temperature insulation, to be withdrawn from touching the seedling after emergence. 5 to 7 days after the emergence of the seedling. When the seedling height of 15 cm to 20 cm in batches to take large seedlings transplanted planting. Planting plant spacing of 15 cm to 20 cm or so, 1 to 2 plants per hole.

(2) asexual cuttings: all varieties that can't bloom and bear fruit can only be propagated by asexual cuttings. Hollow cabbage is easy to send adventitious roots, so asexual reproduction is easy to survive. Specific methods vary. Some places are the previous year to stay good root and stem directly planted in the field, seedlings grow out more than 35 centimeters when the pressure vine, in order to re-emerge new roots, promote the development of new seedlings. Afterwards, often press the vine, until the whole field, and then harvested in batches or transplanted. You can also put the vine stems left over from the previous year in a warm seedbed at 20℃ to 25℃ to germinate, and take cuttings when the seedlings are 10cm to 20cm high in a windy, sunny, warm and fertile soil to expand the reproduction coefficient, and then take cuttings in the field.

(3) Fertilizer management: dry planting is preferred to choose low terrain, soil moist and fertile plots of cultivation. After planting live trees, in addition to plowing and weeding, in order to help improve the ground temperature, but also to apply fertilizer. After 1 month after planting, into the summer, the temperature rises, the plant grows rapidly, fertilizer and water demand is large, to diligent fertilizer, diligent watering.

Fertilizer to follow the application of Hengbiao people and fast-acting nitrogen fertilizer, the concentration of fertilizer can not be too high, so as not to burn seedlings, should master the principle of light after heavy. The soil should always be kept moist. Especially in the hot and dry season, watering diligently, watering enough. In order to promote the rapid growth of stems and leaves, early picking tops on the market, available 20ppm erythromycin on seedlings for foliar spraying, every 7 to 10 days spray, *** for 2 to 3 times.

Cultivation technology of water cabbage

Cabbage has shallow water planting and deep water floating plant two kinds.

Shallow water cultivation is the use of shallow fields or shallow pond cultivation. Before planting, the water is first released, the ground is prepared, weeds are removed, and then cuttings are taken. The cuttings are about 20 centimeters long, inserted diagonally into 2 to 3 sections at intervals of about 26 centimeters, with a depth of about 3 centimeters, and the seedling leaves can be exposed to the water. After the cuttings, in order to improve the soil temperature, conducive to root survival, the water layer should not be too deep, generally to maintain 6 cm to 9 cm is appropriate.

Deep water floating planting method is to hollow cabbage seedlings at a distance of about 15 centimeters, braided in the hair braid of the cane or straw rope. In order to make both sides of the rope equal in weight, rotate the head and tail of the seedling between each other.

The rope is 10 meters long and 3 meters long, and the two ends of the rope are made into a circle, which is placed on a stake at the edge of the pond. In this way, the seedling can float up and down with the rise and fall of the water surface. In order to facilitate the management of the cane or grass rope in the water can take the arrangement of large and small rows. Large rows of two ropes 1 meter apart, small rows of two ropes 30 centimeters apart.

Water hollow cabbage management is simple, in the water quality is more fertile running water, the plant grows well, generally more without fertilizer. And in the lack of fertilizer at the stagnant water, should be fertilized. The water temperature is high, every 10 to 15 days to harvest 1 time, after the day cools down, every 20 days to harvest 1 time. Harvesting methods are the same as dry water spinach. Floating water planted cabbage plant tips fat and tender, but because of the inconvenience of fertilizer, the general yield is not high. To the late growth of stem and leaf senescence, and fall leafy vegetables have more types, can be left to grow, for green fodder. To frost before the harvest is completed.