〔美国《作物与土壤》1976年28卷7期25页报道〕由于豆科植物本身能固氮,许多人可能对这些作物完全不施氮肥.得克萨斯大学研究人员发现,对花生施少量氮肥可以增产. 研究人员在肥力一样的同一地点种植花生五年.研究每年花生对在不灌溉与灌溉条件下施肥的反应.结果表明,在大多数试验中,每亩施3.78斤氮或与磷钾共施,可获得 [Crops and Soils, 1976, Vol. 28, No. 7, pp. 25] Many people may not fertilize these crops with nitrogen because of their ability to fix nitrogen, and researchers at the University of Texas found that a small amount of nitrogen on peanuts can increase yields. The researchers planted peanuts for five years in the same fertile site and studied the annual peanut response to fertilization under both irrigated and irrigated conditions.The results showed that in most of the experiments 3.78 kg of nitrogen per mu was applied or co-applied with P and K, Available