Cabbage is leafy vegetables, the growth period of 60 to 70 days, generally produce 4500 to 6000 kg per mu. In order to obtain high yield of Chinese cabbage, Cheng Zhihui, a professor at the College of Horticulture, Northwest Agriculture and Forestry University, reminds growers of the following technologies:
Shizuji Fei
Basal fertilizer is the basis for the harvest of Chinese cabbage. In general, the soil fertility of the old vegetable plots is relatively high, and organic manure can be applied in an appropriate amount. The proportion of nutrients in compound fertilizers is dominated by nitrogen and potassium, with the application of phosphate fertilizer. The new vegetable plots should be re-applied with organic fertilizers, with the application of ternary compound fertilizer.
Rosette seedlings
In the seedling stage, it is necessary to control the water-control nitrogen fertilizer. In addition to raising the seedling fertilizer, the seedlings are generally planted in the rosette stage to make the outer leaves of the shoots grow robustly and promote the down-rooting of the roots, laying the foundation for rapid growth and absorption of nutrients and water in the later period.
top dressing
The first application of fertilizer should be controlled in combination with irrigation during the late period of the rosette period. Top dressing is mainly composed of quick-acting nitrogen fertilizer and potash fertilizer. After water and fertilizer, it enters the heart-filling period. The first 2-3 top dressings are carried out in the early and middle period of Baoxin. The main topdressing nitrogen fertilizer, up to two times, control the amount. In the later period of time, nitrogen fertilizer was stopped. The amount of nitrogen fertilizer for each top dressing depends on the growth of Chinese cabbage.
Foliar spraying fertilizer
In the high-yield Chinese cabbage fertilization, in addition to the application of a large number of nitrogen, phosphorus and potassium elements, the application of medium and trace elements should also be considered. Judging from the current problems in the production of Chinese cabbage, in some areas, calcium and boron are the main physiological problems, and foliar fertilizers containing calcium, boron, and iron can be sprayed.
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