Northeast soybean
Fertilization principle
(1) According to the soil test results, the proportion of phosphate fertilizer application should be appropriately reduced. For high-yield soybeans, the amount of potassium fertilizer applied can be appropriately increased, and rhizobium is promoted.
(2) On the acidic soil, it is recommended to choose physiological alkaline fertilizer or physiological neutral fertilizer, phosphate fertilizer to choose calcium magnesium phosphate fertilizer, calcium fertilizer to choose lime.
(3) Advocate lateral deep fertilization, the fertilization position is 5~7 cm on the side of the seed and 5~8 cm below the seed; if the lateral deep fertilization is not possible, layered fertilization can be applied, and the depth of fertilization is 3~4 cm below the seed. 3,6~8cm accounted for 2/3; when it is difficult to carry out layered fertilization, side fertilization is adopted in the high-cold organic matter in the north, and deep fertilization is adopted in Other areas, especially the phosphate fertilizer should be concentrated and applied to the plant 10 cm.
(4) Replenishing boron fertilizer and molybdenum fertilizer. In areas where the symptoms are mild, molybdenum fertilizer can be used for seed dressing. It is best to mix seed dressing with rhizobium agent to improve the efficiency of tumor formation.
(5) Strengthen the matching of fertilization and cultivation techniques. 2. Fertilization advice
(1) According to the nutrient demand of soybean, the application ratio of NPK (N-P2O5-K2O) is 1:1.2:0.3~0.5 in high-fertility soil; the amount of nitrogen and potassium can be increased in low-fertility soil, and the ratio of NPK is 1:1:
0.3~0.7.
(2) The target output is 130~150 kg/mu, nitrogen fertilizer (N) 2~3 kg/mu, phosphate fertilizer (P2O5) 2~3 kg/mu, and potassium fertilizer (K2O) 1~2 kg/mu.
(3) The target output is 150~175 kg/mu, nitrogen fertilizer (N) 3~4 kg/mu, phosphate fertilizer (P2O5) 3~4 kg/mu, and potassium fertilizer (K2O) 2~3 kg/mu.
(4) The target output is more than 175 kg/mu, nitrogen fertilizer (N) 3~4 kg/mu, phosphate fertilizer (P2O5) 4~5 kg/mu, and potassium fertilizer (K2O) 2~3 kg/mu. In low-fertility soil, the amount of nitrogen and potassium can be increased appropriately. The application amount of nitrogen, phosphorus and potassium: nitrogen fertilizer (N) 4~5 kg/mu, phosphate fertilizer (P2O5) 5~6 kg/mu, potassium fertilizer (K2O) 2~3 kg/mu.
(5) High-yield areas or soils with molybdenum and boron deficiency areas should be supplemented with boron fertilizer and molybdenum fertilizer; in areas with less severe symptoms, micro-fertilizer seed dressing can be adopted. The application of soybean rhizobium agents is advocated.
This article URL: Spring 2015 Northeast soybean science fertilization technical guidance
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