(I) Existing problems Nitrogen, phosphorus and potassium fertilizers are generally used at a low rate, nutrient ratios are not harmonized, organic fertilizers are insufficiently used, straw returning rates are low, and trace elements such as boron are lacking. 2, under the conditions of 100-200 kg per mu: nitrogen fertilizer (N) 8-10 kg / acre, phosphate fertilizer (P2O5) 3-5 kg ​​/ acre, potassium fertilizer (K2O) 5-7 kg / acre, borax 0.75 kg / acre; 3, under the conditions of 100 kg per mu: nitrogen fertilizer (N) 5-7 kg / mu, phosphate fertilizer (P2O5) 3-4 kg / mu, potassium fertilizer (K2O) 0-4 kg / mu, borax 0.5 kg / mu. Fertilizer management: 50% of the total amount of nitrogen fertilizer is used as base fertilizer, 20-30% as wintering seedling fertilizer, and 20-30% as manure fertilizer. The manure fertilizer in the three-maize system should be moved forward; Potash 60% is used as base fertilizer, 40 % for manure; phosphate fertilizer and boron fertilizer as base fertilizer. If the basal fertilizer is applied to farmyard fertilizer, the base fertilizer can be reduced as appropriate. Wash Basin Moulds,Mould For Wash Basin,Plastic Wash Basin Mold,Outdoor Wash Basin Molds ZHEJIANG LEIFENG MOULD CO., LTD. , https://www.lefnmouldmaker.com
(two) the principle of fertilization
1. Increase the use of organic fertilizers, promote the return of straw, and organic fertilizers;
2. According to the available boron status of the soil, supplement the boron fertilizer;
3. Appropriately reduce the nitrogenous fertilizer application rate and increase the proportion of the donkey-fertilizer;
4. The combination of fertilizer application and high-yield and high-quality cultivation techniques.
(B) Fertilization Suggestions
1. Under conditions of more than 200 kilograms per mu: nitrogen fertilizer (N) 11-13 kg/mu, phosphate fertilizer (P2O5) 4-6 kg/mu, potash fertilizer (K2O) 7-9 kg/mu, borax 1 kg/mu;