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晋西黄土丘陵沟壑区 ,水是影响作物生长发育的主要限制因子 ,如何合理地开发利用有限的雨水资源 ,是发展农业生产的关键所在。 1 998年在王家沟流域梯田地进行了起垄宽、窄膜覆盖微集流单、双行栽培试验研究 ,结果表明 :在玉米种植密度 4.2万株 /hm2 的情况下 ,起垄宽膜覆盖优于起垄窄膜覆盖 ,单行种植优于双行种植。起垄宽膜单行栽培较平铺膜产量提高 3 4 .5% ,纯收入提高 6 5.2 % ;较无膜对照产量提高 58.1 % ,纯收入提高 71 .1 %。
Water is the main limiting factor to crop growth and development in the hilly and gully regions of the Loess Plateau in western Shanxi. How to develop and utilize the limited rainwater resources rationally is the key to the development of agricultural production. In 1998, a study on single-row and double-row cultivation with ridge width and narrow-width covered microchannels was carried out in the terraced fields of Wangjiagou Watershed. The results showed that in the case of corn planting density of 42,000 plants / hm2, Better than ridging narrow film coverage, single row planting is better than double row planting. Ridged monoculture film production increased by 34.5% compared with flat film production, while net income increased by 5.22%. Compared with no film control, the yield increased by 58.1% and net income increased by 71.1%.