Application method: First, it is used as base fertilizer. When preparing the soil, 200-400 grams of ferrous sulfate is mixed with organic fertilizer or superphosphate; the second is for seed fertilizer. Before sowing, soak seeds with 0.1% ferrous sulfate solution for 24 hours, remove and dry the seed coat after soaking; When the symptoms of yellowing occur in the peanut flowering period, the pod-forming stage or the new leaves, the 0.2% ferrous sulfate solution is sprayed on the foliar surface, usually every 5~6 days, and sprayed continuously for 2~3 times.
Peanut application of boron fertilizer technology
For each ton of dry matter formed by boron fertilizer, it needs to absorb 44 grams of boron. In the absence of boron, the plants are short, with many branches and clusters. The heart veins of the unfolded leaves are light in color, the rest are dark, light green, the leaves are small and shrinking, the leaves are yellow and gradually expand outward. Dry, leaf pillows have brown marks, so that the petiole can not stand, even drooping, the old leaves are gray, the plants are less flowering or even no flowers, the roots are easy to aging, the ability to expand is weak, the roots are few, the roots have black spots, easy to be necrotic, The nutrient dysplasia is easy to form a hollow fruit with shell and no kernel. Applying boron fertilizer on boron-deficient soil can increase peanut yield by 7.8~22.5%.
Application method: First, it is used as base fertilizer. The application of boric acid or borax 0.2~l kg of hydrazine is mixed with organic fertilizer or nitrogen or phosphate fertilizer; the second is for seed fertilizer. Before sowing, soak seeds with 0.02~0.05% boric acid or borax solution for 4~6 hours, or mix 0.4 kg of boric acid or borax per kg of peanuts; the third is for top dressing. 50-100 grams of boric acid or borax per acre, mixed in a small amount of decomposed organic fertilizer, applied before flowering; the fourth is sprayed outside the root. Foliar application of 0.2% boric acid or borax solution in peanut seedling, initial flowering and full bloom.
Peanut application of molybdenum fertilizer technology
Molybdenum-fermented peanuts need to absorb 1.32 grams of molybdenum per ton of dry matter. In the absence of molybdenum, due to the inhibition of nitrogen fixation by rhizobium, it usually shows typical symptoms of nitrogen deficiency. According to foreign studies, even in the absence of molybdenum, peanuts can continue to flower, but growth is inhibited. The application of molybdenum fertilizer on the molybdenum-deficient soil can increase the yield of peanut by 11.93%.
Application method: First, it is used as base fertilizer. When the soil is prepared, 50-100 g of ammonium molybdate is mixed with superphosphate and the second is used as seed fertilizer. Before sowing, soak seeds with 0.1~0.2% ammonium molybdate solution for 3~5 hours, or use ammonium molybdate to seed the seeds at 0.2~0.3%; In the peanut seedling stage and flowering stage, the surface is sprayed with 0.1~0.2% ammonium molybdate solution.
Rational application of micro-fertilizer can increase peanut yield and bring good income to growers.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
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