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黄豆是根瘤共生的豆科作物,根瘤能固定空中的游离氮素,根瘤的残体和黄豆残根落叶,增加了土壤的有机质,使土壤越种越肥。1981年5月28日,宾阳县土肥站在新宾公社新廖大队,分别对生长好的和生长较差的两块黄豆地进行养分含量分析,分析结果1.在新廖三队亩产黄豆200斤的地里调查,1平方米面积里面得根、茎、叶、荚、根瘤鲜重4.3斤,折合每亩2863.8斤。化验结果,
Soybean is a nodular symbiotic leguminous crops, nodules can be fixed in the air of free nitrogen, nodules and residual roots and leaves of decayed roots, an increase of soil organic matter, the more the soil more fat. May 28, 1981, Binyang County, Tuo Xinbin commune Xinliao Brigade, respectively, growth and poor growth of two soybeans were analyzed for nutrient content, analysis of the results 1. Xinliao three mu per mu Soybean 200 pounds of land survey, 1 square meters of area inside the root, stem, leaf, pod, fresh weight of 4.3 kg nodules, equivalent to 2863.8 kg per mu. Laboratory results,