Trace elements play an important role in the growth and development of peanuts, such as nitrogen, phosphorus, potassium, etc. Scientifically increasing trace element fertilizers is an important measure for high quality and high yield of peanuts. Iron fertilizer peanuts need to absorb 264 grams of iron for each ton of dry matter formed. In iron deficiency, the plants were short, with few branches, late flowering, less flowers, less root nodule, poor root development, and 1-3 of the compound leaf-leaved leaves below the heart were visibly green, but the veins were still green. In severe cases, the veins are chlorotic and yellow, and the upper leaves are yellow-white. The leaves of the leaves appear brown necrotic spots until the leaves die. The use of iron fertilizers on iron-deficient soils generally increases peanut production by more than 10%. Application method: First, as base fertilizer. During site preparation, 200-400 grams of ferrous sulfate per mu is mixed with organic fertilizer or superphosphate, and the second is for seed fertilizer. Before sowing, soaking with 0.1% ferrous sulfate solution for 24 hours, remove and dry seed coat; third, spray the roots. When the symptoms of yellowing appear in the peanut flowering stage, the scarring stage or the new leaves, they are sprayed with 0.2% ferrous sulfate solution and sprayed once every 5~6 days. Continuous spraying is performed 2~3 times. For each ton of dry matter formed by a boron fertilizer, 44 grams of boron need to be absorbed. In the absence of boron, the plants are dwarf, with many branches and clusters. The color of the veins of the unfolded heart is shallow, and the rest is dark in color, with light green and white leaves. The leaves are small and shrunken. The tips of the leaves are yellow and gradually expand outward. Dry, leaf brown pillow, so that the petiole can not stand up, even sagging, the old leaves dark gray, plant flowering or even no flowers, the root is easy to aging, expansion ability is weak, minimal roots, the root tip has black spots, easy to necrosis, The nuts are stunted and easily form shellless hollow fruit. The application of boron fertilizer on boron-deficient soil can increase peanut production by 7.8 to 22.5%. Application method: First, as base fertilizer. Mu application of boric acid or borax 0.2 ~ l kg? With organic fertilizer or nitrogen, phosphorus fertilizer mixed application; the second is for seed fertilizer. Before sowing, soaking with 0.02 ~ 0.05% boric acid or borax solution for 4 ~ 6 hours, or boiled with boric acid or borax 0.4 kg per kilogram of peanut seed; the third is for top dressing. Per acre with boric acid or borax 50 ~ 100 grams, mixed in a small amount of decomposed organic fertilizer, topdressing before flowering; Fourth, the root is sprayed. In the peanut seedling stage, initial flowering stage and flowering stage, spraying with 0.2% boric acid or borax solution. Molybdenum peanuts need to absorb 1.32 grams of molybdenum for each ton of dry matter formed. In the absence of molybdenum, rhizobia's nitrogen fixation is often impeded, so that 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. Applying molybdenum fertilizer on molybdenum-deficient soil can increase peanut production by 11.93%. Application method: First, as base fertilizer. At the time of site preparation, 50-100 grams of ammonium molybdate was mixed with superphosphate, and the second was for seed fertilizer. Before sowing, soaking with 0.1~0.2% ammonium molybdate solution for 3~5 hours, or dressing with ammonium molybdate according to 0.2~0.3% of seed amount; third, spraying outside the root. At the seedling and flowering stages of peanuts, they were sprayed with 0.1-0.2% ammonium molybdate solution. Appropriate application of trace fertilizer can increase the output of peanuts and bring good benefits to growers.
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