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. During the ball stage, combined with pest control, 0.5%-1% urea and 0.2% potassium dihydrogen phosphate solution + photosynthetic film fertilizer were applied to prolong the leaf functional period and prevent premature aging, thereby increasing 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 twice before and during the Chinese cabbage cabbage to promote vegetative growth. Don't avoid cabbage topdressing nitrogen fertilizer about 20 days before harvest to prevent the accumulation of nitrate and affect the quality of cabbage.
HSG Catheter,silicone HSG catheter,Catheter,HSG
Anesthesia Medical Co., Ltd. , https://www.jssinoanesthesias.com