Fertilization principle
(1) Rational application of organic fertilizer, organic fertilizer and chemical fertilizer application; the application of nitrogen, phosphorus and potassium fertilizer should follow the principles of nitrogen control, phosphorus stabilization and potassium increase.
(2) The distribution of fertilizers is based on base and chasing; the topdressing is mainly based on nitrogen fertilizer, and the nitrogen, phosphorus and potassium are rationally coordinated; pay attention to the appropriate supplement of calcium and boron in the period from rosette to late stage to prevent “dry heart†And other diseases.
(3) Combine with high-yield and high-efficiency cultivation techniques, especially water-saving irrigation technology, to give full play to the coupling effect of water and fertilizer and improve fertilizer utilization.
2. Fertilization advice
(1) Applying high-quality farmyard manure 2 square meters per mu.
(2) The production level is 4500-5500 kg/mu, nitrogen fertilizer (N) 13-15 kg/mu, phosphate fertilizer (P2O5) 4-6 kg/mu, potash fertilizer (K2O) 8-10 kg/mu; production level 5500-6500 Kg/mu, nitrogen fertilizer (N) 15-18 kg/mu, phosphate fertilizer (P2O5) 6-10 kg/mu, potash fertilizer (K2O) 12-14 kg/mu; production level greater than 6500 kg/mu, nitrogen fertilizer (N) 18 -20 kg / mu, phosphate fertilizer (P2O5) 10-12 kg / mu, potash fertilizer (K2O) 14-16 kg / mu. Nitrogen and potassium fertilizers 30%-40% base application, 60%-70% in the rosette stage and the beginning of the ball are divided into two times, the phosphate fertilizer is used as the base fertilizer or acupoint application.
(3) For the more serious plots of “dry heartburn†in previous years, pay attention to reduce the application of ammonium nitrogen or moderate calcium supplementation, and spray 0.3%-0.5% calcium chloride solution from the rosette stage to the late stage of the ball formation. -3 times; for boron-deficient plots, 0.5-1 kg/mu of borax may be applied, or 0.2%-0.3% of borax solution may be sprayed 2-3 times on the foliage. At the same time, it can be sprayed with spraying 2-3 times of 0.5% potassium dihydrogen phosphate to increase the vegetable yield and commercial rate of cabbage. (Ministry of Agriculture)
This article URL: Ganlan planting technology 2016 spring open field cabbage scientific fertilization technical guidance
Hydroponics is a subset of hydroculture, the method of growing plants without soil, using mineral nutrient solutions in a water solvent. Terrestrial plants may be grown with only their roots exposed to the mineral solution, or the roots may be supported by an inert medium, such as perlite or gravel. The nutrients in hydroponics can come from an array of different sources; these can include but are not limited to waste from fish waste, duck manure, or normal nutrients.
Greenhouse Hydroponic System,Greenhouse A Hydroponics,Greenhouse Flat Hydroponics,Greenhouse Vertical Hydroponics
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