Fertilization principle of pollution-free vegetables

The principle of fertilization should be mastered during the cultivation of pollution-free vegetables. Fertilization should be based on decomposed manure, compost and other organic fertilizers, supplemented by mineral chemical fertilizers, but the use of chemical fertilizers should be limited as much as possible. If necessary, some fertilizers can be applied in a limited and selective manner. It is forbidden to use nitrate nitrogen fertilizer, and chemical fertilizer must be combined with organic fertilizer. Fertilizer should be applied deep and early, and deep application can reduce the use rate of nitrogen fertilizer. Early application is beneficial to early plant growth, prolonging fertilizer efficiency and reducing nitrate accumulation.

Formulated fertilization is the basic fertilization technology for pollution-free vegetable production bases. In order to reduce pollution and give full play to fertilizer efficiency, the appropriate amount and proportion of organic fertilizer, nitrogen, phosphorus, potassium and trace element fertilizers and corresponding fertilization techniques should be determined according to the nutritional and physiological characteristics of vegetables, the laws of fertilizer absorption, soil fertility and fertilizer effects. To achieve a symptomatic formula.


Source: Dali Agricultural Tourism Station, Dali Provincial Tourism Resort

3 sides veneer wood slat panel

3 Sides Veneer Wood Slat Panel,Noise Reduction Panel,Acoustic Panels,Solid Wood Panel

Hebei RooAoo New Material Technology Co.,Ltd. , https://www.raacoustic.com