Effects of Different Irrigation Quotas on Soil Salt Transport in Maize Field under the Shallow Buried Drip Irrigation
The effects of irrigation quota on soil salt distribution in 0-60 cm soil layer under shallow buried drip irrigation of maize were studied in Xiliaohe plain between 2019 and 2020,the irrigation quotas were estab-lished at 40％(W1),50％(W2)and 60％(W3)of the conventional border irrigation amount.The soil salt content in 0-10 cm soil layer under shallow buried drip irrigation decreased with the increase of irrigation quota,and the differ-ences between treatments increased with the development of growth period.In the vertical direction of drip irrigation belt,the difference between treatments reached a significant level at 25 cm away from the drip head.In the parallel direction of drip irrigation belt,the difference between W1,W2 and W3 reached a significant level in the middle of two drops.In the vertical direction of soil salt distribution,the content of soil salt in 0-30 cm soil layer increased first and then decreased with the increase of irrigation quota,and the content of soil salt in soil below 40 cm soil lay-er increased with the increase of irrigation quota.Under shallow buried drip irrigation,the salt in the soil layer above 30 cm tended to migrate upward to the surface and accumulate.Increasing irrigation quota caused the surface salt to migrate further in the horizontal direction and deeper in the vertical direction.
NETL
NSTL
万方数据
