However, when irrigation application decreased by 25% the salt accumulation in root zone will not be obvious and the subsurfacedrainage 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%。
2
Subsurface pipe drainage in drought-prone region is superior to surface drainage in draining off water and salt, controlling ground water-level, and increasing crop output, etc.