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在辽西建平县旱地上设置不同保水措施的田间试验。结果表明:在地下水位较低的旱田上,土壤水分变化主要受蒸腾、降水、蒸发的影响。0～100cm土层土壤水分变化主要与作物蒸腾有关,其次是降水和蒸发;0～30cm则主要受降水影响,其次是蒸腾和蒸发。覆膜对增加0～30cm土层土壤含水量有明显作用,但深层蓄水较低;镇压加深松处理在作物生长后期土壤水分贮存较多。各种保水措施都有不同程度的增产效果,玉米增产12～60％,向日葵增产9.2～4.7％。
Field experiment of different water conservation measures on dry land in Jianping County, western Liaoning. The results showed that the soil moisture change was mainly affected by transpiration, precipitation and evaporation in dryland with low groundwater level. Soil water content in 0 ~ 100cm soil layer was mainly related to crop transpiration, followed by precipitation and evaporation; 0 ~ 30cm was mainly affected by precipitation, followed by transpiration and evaporation. The mulching has a significant effect on increasing the soil water content of 0 ~ 30cm soil layer, but the deep water storage is lower. The soil moisture storage is more in later stage of crop growth by repression and deepening pine treatment. A variety of water conservation measures have different levels of yield increase, corn yield 12 to 60%, sunflower yield 9.2 to 4.7%.