节水灌溉对玉米田间土壤水分的影响

通过设置充分灌溉、节水20％、节水40％3种灌溉方式对玉米田间土壤中水分含量及变化情况进行研究，结果表明，节水20％处理下土壤中的水分含量相对较高，利于玉米生长；且在各个处理的苗期，各层土壤中的水分变化不大，拔节期后，0―40cm土层变化剧烈，60―100cm则相对平缓，得出玉米的根系主要分布在0―40cm土层中。

Effect of Water Saving Irrigation on Soil Moisture in the cornfields

Full irrigation,water-saving 20%,and water-saving 40% irrigation methods were respectively set to study soil moisture content and changes in maize field.The results showed that water content in the soil was relatively high in water-saving 20% treatment ,which was conducive to the growth of the corn; the water con-tent in different layers of soil was not changed at the seedling stage ,the water content of 0―40 cm soil layer changed dramatically and that of the 60―100 cm was relatively flat after the jointing stage ,it indicated the maize root system was mainly distributed in 0―40cm soil layer.