The study about the effects of ridge and furrow rainfall harvesting system (RFRH) on Elymus sibiricus yield was carried out in Bashang agro-pastoral region during 2009 to 2010 years. The aim was to maintain and increase perennial grassland yields. The soil hydrothermal conditions and roots biomass distribution and yield of E. sibiricus was measured. The results showed that RFRH system could improved soil hydrothermal condition, including increase of soil surface volumetric water content by 9.67%-26.94%, and the soil water storage of 30 cm depth by 13.38%-24.92%, and the soil surface daily minimum temperature, which improved soil surface roots biomass distribution, promoted yields increase by 98%-230%. Treatment of MR60 with 60cm-ridge and 30 cm-furrow had the highest yield 5.34 t/hm2. Compared with the control with the yield of 1.62 and 1.18 t/hm2 of the two year respectively, the average yield of MR60 with 5.34 and 2.79 t/hm2 of the two year increased by 230% and 136%, respectively. RFRH system could significantly increase and maintain E. sibiricus growth and yields under rainfall decreasing and erratic distribution conditions.%为探索和解决干旱半干旱区多年生牧草持续性生产问题,在坝上农牧交错区对垄沟集雨栽培措施下老芒麦草地的生长状况进行了研究.测定比较了垄沟集雨处理和平作对照的土壤水热条件,地下生物量分布以及不同阶段的产草量.结果表明:垄沟集雨使种植区土壤表层体积含水率幅度增加9.67％～26.94％,生长季土壤表层0～30 cm贮水量提高13.38％～24.92％,土壤表层最低温度提高1.02～2.08℃;土壤水热条件的改善增加了表层0～10 cm根系的分布,提高产草量98％～230％.垄宽60 cm沟宽30Cm的处理的产草量最高为5.34t/hm2,2 a年平均产量为5.34和2.79 t/hm2分别比对照1.62和1.18 t/hm2提高了230％和136％.垄沟集雨措施对降雨量较少,分布不均匀的干旱半干旱区的人工草地种植具有明显的稳产增产作用.
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