NGHIÊN CỨU ẢNH HƯỞNG CỦA PHÂN BÓN VÀ CÁC CHẾ PHẨM DINH DƯỠNG ĐẾN NĂNG SUẤT VÀ CHẤT LƯỢNG CÁC LOẠI RAU CẢI ĐẶC SẢN

Leaf vegetables are produced and used with a large proportion in Vietnam. However, the misuse of fertilizers, especially high nitrogen and disproportionately fertilizer used affects the yield and product quality. The study on the effects of fertilizers and nutrition products to the yield and quality of vegetables as Dong Du Chinese mustard, Thai Binh radish and Gia Lam chrysanthemum garland was conducted in 2009-2010 at the Research Institute of Vegetables. The results show that to achieve high marketable yield and best quality, the amount of fertilizer for 1 ha were: 1) for Dong Du Chinese mustard at 20 tons of manure + 80 kgN + 45 kgP2O5 + 60 kgK2O and foliar fertilizer of Agrodream or Red Dolphin at recommended doses; 2) for Thai Binh radish at 15 tons of manure + 50 kgN + 40 kgP2O5 + 40 kgK2O and foliar fertilizer of Agrodream or Red Dolphin at recommended doses; 3) for Gia Lam chrysanthemum garland at 10 tons manure + 40kgN + 30kg P2O5 + 30 kgK2O and foliar fertilizer of Agrodream or Seaweed at recommended doses. Using the organic foliar fertilizers increased the yield at 5-19%, reduced the amount of chemical fertilizers, then gave good quality vegetables and reduced the impact to the environment.