The subsurface irrigation and drip irrigation decreased significantly the irrigation rate and increased significantly water use efficiency.
采用滴灌和渗灌栽培的灌水量显著减少，极大地提高了水分生产率。
A mathematical model whose variable is water head can simulate the effects of water head and properties of subsurface irrigation pipe on irrigation.
以压力水头为因变量的数学模型可以模拟供水压力和灌水器特性对灌溉效果的影响。
However, when irrigation application decreased by 25% the salt accumulation in root zone will not be obvious and the subsurface drainage flow will decrease by 31.4%.
现状灌溉用水量减少25%时，作物根区没有产生明显的积盐，地下排水量减少31.4%。
Subsurface drip irrigation (SDI) is one of the water saving irrigation system, with its obvious advantages and some disadvantages.
地下滴灌系统是很重要的一种节水灌溉系统 ，有其显著的优点 ，也存在许多缺点。
Subsurface drip irrigation water-salt transport influent cotton biology character and yield, whether biology yield or economy yield is higher than drip under film.
地下滴灌水盐运移对棉花生理性状及产量都有较大影响，无论是生物学产量还是经济产量均比膜下滴灌的高。
Subsurface drip irrigation water-salt transport influent cotton biology character and yield, whether biology yield or economy yield is higher than drip under film.
地下滴灌水盐运移对棉花生理性状及产量都有较大影响，无论是生物学产量还是经济产量均比膜下滴灌的高。
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