科研之友
微信
新浪微博
Facebook
分享链接
摘要
It is difficult for the subsurface drip irrigation wetting body to better match the root system water absorption at different growth stages. In order to solve the problem, some researchers have proposed a new type of subsurface drip irrigation, layered subsurface drip irrigation system. A combination of laboratory experiments and HYDRUS-2D numerical simulation was used. The two major grape-producing areas in Ningxia and Guanzhong were taken as examples to study the soil water movement law of layered subsurface drip irrigation, and the layered subsurface drip irrigation optimal placement depth was proposed. The research results show that the predicted value of HYDRUS-2D has a good agreement with the measured value. The depth of the drippers directly affects the distribution of soil moisture, and the soil volume within the optimal water content range under two types of soil increases with the increase of the distance between drippers. Appropriately increasing the depth of the shallow dripper and reducing the depth of the deep dripper can reduce the inefficient loss of water. In order to avoid inefficient consumption of water and improve the matching effect of wetting body and root system, it is recommended that the appropriate depth placement with a single dripper of grapes in Guanzhong area is 20 cm. The appropriate depth of dripper placement in Ningxia are 15 cm and 45 cm. ? 2021, Editorial Department of Journal of Drainage and Irrigation Machinery Engineering. All right reserved.
- 单位
