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一、需肥特点花生对氮、磷、钾三要素的吸收量是两头少、中间多。在全生育过程中,对氮、磷、钾的吸收是:幼苗期、饱果期、成熟期少,开花下针期、结荚期多。花生吸收的氮素主要来自根瘤固氮。据试验测定,花生吸收的氮素有2/3至4/5来自根瘤固氮。花生亩产在300公斤以内,施肥量呈递增,超过300公斤呈递减。花生属于喜钙的豆科作物,钙元素能促进花生体内蛋白质和酰胺的合成,减少空秕率,增加荚果饱满度。缺钙根条细弱,单仁果、秕果和空果明显增多。因此,科学增施钙肥,可提高荚果产量和品质。
First, fertilizer needs Peanut on nitrogen, phosphorus and potassium absorption of three elements is two less, the middle and more. During the whole reproductive process, the absorption of nitrogen, phosphorus and potassium are: seedling stage, full fruit stage, less mature stage, flowering under needle stage and more podding stage. Nitrogen absorbed by peanut mainly comes from nodule nitrogen fixation. According to the test, 2/3 to 4/5 of the nitrogen absorbed by peanuts comes from the nodule nitrogen fixation. Peanut mu produce less than 300 kg, the amount of fertilizer was increased, more than 300 kg was decreased. Peanuts are calcium-like leguminous crops, calcium can promote the synthesis of protein and amide in peanut, reduce empty rate, increase pod fullness. Calcium root thin, single fruit, fruit and fruit significantly increased. Therefore, the scientific application of calcium fertilizer can improve pod yield and quality.