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提要稀土是化学元素周期表中的镧系元素和化学性质相似的钇、钪共17种元素的统称。稀土有生理活性,对作物有生长刺激作用。全理施用稀土,能改善作物品质增加产量。1985年我们对稀土在牧草上的应用效果及技术进行了研究,并在全国14个省市大面积推广示范,取得了明显效果。试验证明,稀土对牧草的生长、发育有明显的促进作用,能提高干草产量19.0％。而且对豆科牧草根瘤菌有刺激作用,能提高根瘤菌的活性,增加固氮,这对增加土壤肥力和提高豆科牧草生物量有明显作用。稀土除拌种外,还可喷施,通过茎叶表面渗透和气孔的作用,直接被牧草吸收利用效果很好。
Abstract Rare earth is a general term for 17 kinds of elements of lanthanide and chemical elements of yttrium and scandium in the periodic table of chemical elements. Rare earth physiological activity, the growth of crops have stimulating effect. The rationale for applying rare earth can improve crop quality and increase yield. In 1985, we researched the application effect and technology of rare earth on pasture and popularized and demonstrated it in a large area in 14 provinces and cities nationwide, and achieved remarkable results. Experiments show that rare earth on grass growth, development has a significant role in promoting, can increase hay production 19.0%. But also stimulates Leguminosae Rhizobium, which can increase rhizobia activity and increase nitrogen fixation, which has a significant effect on increasing soil fertility and enhancing legume biomass. In addition to the rare earth seed dressing, but also spray, through the stem and leaf surface infiltration and stomatal function, direct absorption and utilization by forage good.