Fertilization principle
In view of the problems of insufficient application of organic fertilizer and potash fertilizer in potato production in autumn and winter in the south, the following fertilization principles are proposed:
(1) Optimize the amount of NPK fertilizer according to soil fertility conditions;
(2) Adding organic fertilizer, promoting organic and inorganic application and straw mulching; avoiding organic fertilizer that is not fully decomposed;
(3) Appropriate application of potassium fertilizer according to soil potassium status; (4) Fertilizer distribution is based on base and chasing, and topdressing is mainly based on nitrogen and potassium;
(5) Fertilizer application should be combined with high-yield and high-quality cultivation techniques. 2. Fertilization advice
(1) The output level is more than 3000 kg/mu, the nitrogen fertilizer (N) is 11~13 kg/mu, the phosphate fertilizer (P2O5) is 5~6 kg/mu, and the potassium fertilizer (K2O) is 14~18 kg/mu;
(2) The production level is 2000~3000 kg/mu, the nitrogen fertilizer (N) is 9~11 kg/mu, the phosphate fertilizer (P2O5) is 4~5 kg/mu, and the potassium fertilizer (K2O) is 12~14 kg/mu;
(3) The production level is 1500~2000 kg/mu, nitrogen fertilizer (N) 7~9 kg/mu, phosphate fertilizer (P2O5) 3~4 kg/mu, potash fertilizer (K2O) 9~12 kg/mu;
(4) The production level is below 1500 kg/mu, nitrogen fertilizer (N) is 6~7 kg/mu, phosphate fertilizer (P2O5) is 3~4 kg/mu, and potassium fertilizer (K2O) is 7~8 kg/mu.
Apply 2~3 square organic fertilizer per mu as base fertilizer; if organic fertilizer is applied to the base fertilizer, reduce the amount of chemical fertilizer as appropriate.
For soils deficient in boron or zinc, 1 kg/mu of borax or 1~2 kg/mu of zinc sulfate may be applied.
For areas with sulfur deficiency, use sulfur-containing fertilizers or 2 kg/mu of sulfur.
40%~50% of nitrogen and potassium fertilizers are used as base fertilizers, 50%~60% are used as top dressings, and all of phosphate fertilizers are used as base fertilizers. Potassium fertilizers in areas with large rainfall during the growing season and soils with sloping soils should be applied in different stages.
This article URL: 2016/2017 autumn and winter potato science fertilization guidance advice potato fertilization skills
Boiling Flask,Glass Boiling Flask,Round Bottom Boiling Flask,Borosilicate Glass Boiling Flask
Yancheng Rongtai Labware Co.,Ltd , https://www.shtestlab.com