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农田微集水种植技术是提高旱区农田作物生产力的一项重要的技术选择,带型(沟垄的宽度比例和数值)的优化设计是其研究和开发所面临的关键问题之一。该研究利用模拟降水等方法,通过降水在沟垄间的分配比例、在沟土中水平分布的不均匀程度,在沟内的最大下渗深度及在沟内的垂直分布特征值4个描述降水在沟垄间分布特征参数对同一沟垄宽度比例的不同宽度值处理对农田水分调控的效果进行了比较分析。结果表明:各种降水处理下,对同一沟垄宽度比值,随着带型的窄化(宽度变窄),降水向垄中的侧渗作用增强,在沟内水平分布的不均匀性降低,在沟内的垂直下渗略有减弱;在蓄水保墒效果上,窄带型要优于同一沟垄比值下的宽带型。
Cropland micro-catchment planting technology is an important technical choice to improve farmland productivity in arid areas. The optimized design of strip type (width and width of ridge and furrow) is one of the key problems in its research and development. This study used simulated precipitation and other methods to describe the precipitation by describing the distribution ratio of precipitation in the ditch and ridge, the horizontal distribution in the ditch soil, the maximum infiltration depth in the ditch and the vertical distribution eigenvalue in the ditch The effects of different width distributions of ditch and ridge distribution width on the water regulation of farmland were compared and analyzed. The results show that under the different precipitation treatments, the ratio of the width of the same furrow and furrow increases with the narrowing of the belt type (narrowing of the width), the lateral infiltration of precipitation into the ridge, the decrease of the horizontal distribution in the furrow, Vertical infiltration in the trench slightly weakened; in the water retention effect, narrow-band type is better than the same width under the ridge-ridge ratio.