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(1) Nitrogen (N): The nitrogen application rate of spring maize is generally 150~200 kg/ha; the nitrogen application rate of summer maize is generally 120~160 kg/ha; the nitrogen application rate of edible sweet corn is 100~140 Kilograms/ha are suitable.
(2) The application rate of late-maturing varieties of phosphate fertilizer (P 2 O 5 ) is 70-120 kg / ha; the suitable amount of early-maturing varieties is 50-80 kg / ha. The amount of phosphate applied depends on the amount of available phosphorus in the soil. Generally less than 0.90 - 1. 70 mg / kg, the recommended amount of phosphate fertilizer is 35 - 75 kg / ha (early maturing variety) or 50 - 100 kg / ha (late maturing variety); when the soil effective phosphorus content is 1.8 - 3.2 When the mg/kg is recommended, the recommended amount of phosphate fertilizer is not 35 kg/ha (early maturing variety) or 50 kg/ha (late maturing variety); when the soil available phosphorus content is greater than 3.2 mg/kg, it is possible to apply no phosphate fertilizer but less phosphate fertilizer.
(3) Potassium fertilizer (K ​​2 O ): 50-100 kg/ha for late-maturing varieties; 40-70 kg/ha for early-maturing varieties is suitable. The amount of potassium applied depends on the available potassium content of the soil. Less than 5. 0------- - 6.6 mg / kg, recommended potassium application rate is 25 - 50 kg / ha (early maturing variety) or 35 - 70 kg / ha (late maturing variety); when soil available potassium When the content is more than 6.6 mg / kg, potassium or less potassium may be applied.
(4) Application of lime (CaO): Strong acid soil requires lime powder below pH 5.0, preferably 2 to 3 tons per hectare. Fully mixed into the plough layer two weeks before sowing
2, sorghum special fertilizer formula sorghum special fertilizer three elements recommended amount: N: P 2 O 5 : K 2 O = 100 - 160 kg / ha: 40 - 80 kg / ha: 40 - 60 kg / ha; before planting When the base fertilizer is applied, the formula is: N : P 2 O 5 : K 2 O=50 kg / ha: 100 kg / ha: 50 kg / ha; the formula for crop topdressing after sowing is: N : P 2 O 5 : K 2 O=50 kg / ha: 0 kg / ha: 50 kg / ha.
3, Millet special fertilizer formula Millet special fertilizer three elements recommended amount; N: P 2 O 5 : K 2 O = 100 kg / ha: 75 kg / ha: 75 kg / ha; when the soil pH is below 5.5, will Influencing the growth and improvement of millet, 3 tons of slag per hectare is applied 2 weeks before sowing, and the application is fully mixed with the soil. Before planting, the full amount of phosphate fertilizer, half amount of nitrogen, potassium fertilizer and organic fertilizer are applied as base fertilizer in the soil. The lower half of the N, K 2 O fertilizer can be used for top dressing in the millet for about 50 days.
4. Soybean special fertilizer formula The recommended amount of soybean special fertilizer is: N : P 2 O 5 : K 2 O=20 — 40 kg / ha: 60 — 90 kg / ha: 30 — 75 kg / ha; soil potassium application rate According to the content of available potassium in soil, when the amount is less than 1.5 - 3.5 mg / kg, the application rate of soil potassium fertilizer should be 30 - 60 kg / ha; and when the effective potassium content of soil exceeds 3.5 mg / kg, consider less or no Shi. Phosphorus and potassium fertilizers are applied as base fertilizers. Nitrogen fertilizers are applied according to spring sowing soybeans and summer sowing soybeans as follows: spring sowing soybeans are applied with half of nitrogen fertilizer for 20 days and 40 days after sowing; summer sowing soybeans 35% of nitrogen fertilizer for base fertilizer, 30% after sowing Applyed for 20 days, 35% was applied during the flowering stage of soybean. For the application of lime, when the soil pH is less than 5.2, the amount of lime per hectare is 2 - 3 tons; the pH is less than 5.5, and when the pH is 5.2 or more, the amount of lime is 1.5 tons / hectare, and 10 kg per hectare is suitable.
5, peanut special fertilizer formula peanut special fertilizer three elements recommended when N: P 2 O 5 : K 2 O = 20 - 40 kg / ha: 30 - 60 kg / ha; planting peanuts before the crop is sugar cane, corn In the case of sorghum, an appropriate amount of nitrogen fertilizer may be applied, and when the sorghum is a bean or vegetable crop, it is preferred to apply less or no nitrogen fertilizer. The amount of phosphate fertilizer should be determined according to the available phosphorus content of the soil. Generally, when the concentration is 0.5-1.8 mg/kg, the application rate of phosphate fertilizer is 60 kg/ha; when 1.9-3.2 mg/kg, the application rate of phosphate fertilizer is 30-60 kg/ha; 1.9 — 3.2 mg/kg, phosphate application rate 30 – 60 kg / ha; and more than 3.2 mg / kg of quick-acting phosphorus content soil can be applied or not.
The application amount of lime and molybdenum fertilizer, if no lime is applied, it is suitable to apply 0.3-0.6 kg/ha of ammonium molybdate per hectare; for the land where lime has been applied, ammonium molybdate is usually not applied, but when it is serious, both can be used. At the same time. For the clay soil, 30% ammonium molybdate can be added as recommended.
6. Sweet potato (sweet potato) special fertilizer formula The recommended amount of sweet potato special formula is N: P 2 O 5 : K 2 O=30 — 80 kg / ha: 30 — 60 kg / ha: 120 — 180 kg / ha. Generally, the amount of nitrogen fertilizer used in sweet potato in the north is 30-40 kg hectares, while in the south, the nitrogen fertilizer needs to be increased to 40-80 kg/ha. The application rate of phosphate fertilizer can be increased by 40-60 kg/ha when the soil pH is above 7. When the pH is below 6.5, the amount of phosphate applied according to the soil available phosphorus content: less than 0.2-0.5 mg/kg. At a time, the amount of phosphate is 60 kg/ha; at 0.5-1.8 mg/kg, the amount of phosphorus is 30 kg/ha; when it is greater than 1.8 mg/kg, the amount of phosphorus is 0-30 kg/ha. Potassium application should also be based on the available potassium content of the soil; when it is less than 2.5 - 4.3 mg / kg, the potassium application is 180 kg / ha; 4.4 - 6.0 mg / kg, the potassium application is 120 kg / ha; 6.1 For mg/kg or more, the potassium application rate is preferably 60 kg/ha. Fertilization of sandy loam soil can be applied in different times; soil and clay soil can be applied as a base fertilizer evenly before the whole land preparation, and no longer apply for top dressing.
7. Mung bean special fertilizer formula Mung bean special fertilizer formula is: N : P 2 O 5 : K 2 O=20 — 40 kg / ha: 40 — 60 kg / ha: 50 — 100 kg / ha. When used as a base fertilizer, it is recommended to use a full amount of phosphate fertilizer and a half amount of nitrogen and potassium fertilizer. When used as a top dressing, half of the nitrogen and potassium fertilizers are advocated. The base fertilizer can be deeply and evenly spread after the soil preparation, and the topdressing can be applied to the plant. — 15 cm is appropriate.
8. Red bean special fertilizer formula Red bean special fertilizer formula is recommended as: N : P 2 O 5 : K 2 O=40 — 60 kg / ha: 40 — 70 kg / ha: 30 — 40 kg / ha. Nitrogen fertilizer can be applied three times, 35% as base fertilizer, 30% applied 20 days after sowing, and 35% applied at flowering stage. Phosphorus and potassium fertilizers are all applied as a base fertilizer at one time. In acidic soils with a pH of 5.5 or less, it is necessary to apply 1500-2000 kg of lime per hectare, which is conducive to the growth of red bean and can promote the increase of yield.
9. Sunflower special fertilizer formula The recommended formula for sunflower special fertilizer is N: P 2 O 5 : K 2 O=60 - 90 kg / ha: 30 - 60 kg / ha: 30 - 60 kg / ha. The nitrogen and potassium fertilizers and the total amount of phosphate fertilizer were applied as base fertilizer, and the remaining half of the nitrogen and potassium fertilizers were applied. The base fertilizer strip is applied to the seed 12 cm deep and 10 cm deep; the top dressing is applied to the soil before the planting for 25-30 days after sowing, and then planted again.
1, corn special fertilizer formula
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