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在晋西黄土丘陵沟壑区的梯田上 ,采用地膜覆盖微集流雨水耕作措施 ,通过对其土壤水分测试结果的分析表明 ,在极干旱年份 ,对土壤水分影响较大的层次为 0 cm～ 10 0 cm土层 ,10 0 cm～ 2 0 0 cm可被吸收利用的有效水分较少。地膜覆盖在极干旱年份可提高土壤水分的利用率。梯田地玉米最佳栽培模式为 :起垄覆膜单行以 3.0万株 / hm2 、起垄覆膜双行以 4 .2万株 / hm2～ 4 .8万株 / hm2 栽培 ,其土壤供水能力强 ,水分利用率高 ,增产作用显著 ,可比常规栽培法提高产量数十倍
On the terraces of the hilly and gully regions in the western Shanxi Province, the mulching with micro-catchment rainwater harvesting was adopted. Based on the analysis of the soil moisture test results, it was found that in the extremely dry years, the soil moisture level is 0 cm ~ 10 0 cm soil layer, 10 0 cm ~ 2 0 0 cm can absorb less effective water utilization. Mulching improves soil moisture utilization in very dry conditions. The best cultivation pattern of terraced maize is as follows: Ridge filming single line with 30,000 plants / hm2, Ridge film double lines with 42,000 / hm2 ~ 48,000 / hm2 cultivation, the soil water supply ability , High water use efficiency, a significant increase in production, than conventional cultivation methods to improve the yield of dozens of times