硝酸稀土在优良牧草生产中的应用研究

稀土是牧草生产中一种重要的生长促进剂,在一定的有效浓度范围内对种子萌发、植株生长以及豆科牧草根瘤发育有明显的促进效果。通过以硝酸稀土(纯度为38％)为试验材料的研究表明,在河南省自然气候条件下,对禾草有效的稀土浓度为500 mg/kg,平均增产幅度为8.5％;对豆科牧草有效的稀土浓度为500-600mg/kg,平均增产幅度为8.8％,施用方法以浸种法最佳。

Study on Productive Effects of RE Applied to Fine Perennial Grasses and Legumes

Rare Earth (RE) is one of very important growing promoter in forage production, which canpromote seed germination, plant growth and nodule bacteria proliferation in certain concentrations. Of all REconcentrations, 500 mg/kg is is most suitable to grasses production and can increase biomass by 7.5%;500-600 mg/kg are most suitable optimum range for RE promote legumes production and rise biomass byabout 7.2%. Seed-soaking is best for forage production in all three RE application methods.