红豆草在旱地土壤的生产性能和农化性状的研究

三年研究结果表明,在陇东黄土旱地春播红豆草(Onobrychis Viciaefolia Scop),第二年产量最高,地下部分生物量增加最多。不同生活年限的红豆草对土壤主要农化性状影响不同:第二年生活的红豆草对耕层土壤培肥效应较显著,土壤有机质和含氮量的净增值最大,土壤微生物总数增加,有益微生物的活动旺盛,土壤有效养分略有增加.

Studies on Productive Performance and Agrichemical Properties of the Onobrychis Viciaefolia Scop in Drought Area Soil

This study has been carried out for three years at drought region w ith yellow soil in east Gansu. The yield of the Onobrychis Viciaefolia Scop was the highest. and the incrcase of its underground biomass was the most in second year. The Onobrychis viciaefolia scop influenced differently on soil agrichemica1 properties in ■arious years of life during the second year growth. it influenced apparent1y on soil fertilization in cultivated horizon. The increase of organic matter and total nitrogen amount was markedly in soil. Both the total amount of microorganisms and useful microbial group increased and available nutrient in soil increased slightly.