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采用田面平整精度Sd 作为定量指标评价土地平整程度 ,根据不同田面平整精度处理得到的作物畦灌试验资料 ,确定畦田平整精度对灌溉效率、灌水均匀度、用水效率和作物产量的影响 .结果表明畦灌系统性能和作物产量随田面平整状况的改善而明显提高 .为达到改进畦田灌水质量、节水增产的目的 ,Sd 值以不大于 2cm最佳 ,为此需采用激光控制下的土地精细平整技术实现这个地面平整标准
The field flatness was evaluated by field flatness Sd as a quantitative index to evaluate the effect of flattening accuracy on irrigation efficiency, irrigation uniformity, water use efficiency and crop yield based on field irrigation data obtained from different field flattening precision treatments. The results showed that irrigation system Performance and crop yield with the formation of the formation of the field conditions significantly improved.To achieve the quality of irrigation and improve water quality, water-saving production, Sd value of not more than 2cm best, for which the use of laser-controlled land leveling technique to achieve this Ground leveling standards