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豆科植物的根瘤菌,能固定空气中的氮素,提高土壤肥力,促进农牧业生产,增加人畜蛋白质营养,节省能源,并改善人类的
Rhizobium legumes, can fix the nitrogen in the air, improve soil fertility and promote the production of agriculture and animal husbandry, increase human and animal protein nutrition, save energy and improve human