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Winter greenhouse cabbage top dressing points
Winter greenhouses Cabbage fertilization is mainly based on high-quality farmyard manure, combined with high-quality farmyard fertilizer and 45% three-component fertilizer, boron and zinc fertilizers as base fertilizer before planting. In the nodule period, combined with pest control, 0.5% ~ 1% urea and 0.2% potassium dihydrogen phosphate solution + photosynthetic film fertilizer can be applied to prolong the functional period of leaves and prevent premature aging, thus improving the net vegetable rate of Chinese cabbage. During the topdressing period of cabbage, it is also possible to chase and apply the same fertilizer as before the planting. The vegetable field has not been ridged, and the topdressing can be carried out in a buried manner to increase the fertilizer efficiency and should be combined with irrigation. This period can last for about one and a half months. It can generally be carried out in two stages before and during the Chinese cabbage cabbage to promote the vegetative growth of the plant. Don't avoid cabbage topdressing nitrogen fertilizer about 20 days before harvest to prevent the accumulation of nitrate and affect the quality of cabbage.