新疆砾石地葡萄滴灌带合理设计及布设参数的数值分析

Numerical analysis of layout parameters and reasonable design of grape drip irrigation system for stony soil in Xinjiang Uighur Autonomous Region

为了摸清新疆含砾石复杂土壤条件下土壤水分运动规律,优化葡萄滴灌系统设计中的各项设计参数及合理布设,该文通过田间交汇试验确定合适的滴头间距为30cm,并借助Hydrus-2D数值模型确定了土壤水力参数,同时运用该数值模型模拟了不同滴头流量和滴灌带水平间距布设形式下地表滴灌土壤水分分布特征。根据土壤湿润体特征结合葡萄根系分布规律,确定新疆砾石地葡萄滴灌系统合理的滴头流量为2.5～3.0L/h,滴灌带水平间距为60cm。该结果可为新疆砾石地复杂土壤葡萄滴灌系统的科学设计和田间合理布设提供参考。

In order to understand the laws of soil water movement under complex stony soil condition and optimize the design parameters and layout parameters of grape drip irrigation system in Xinjiang Uighur Autonomous Region,field experiments were carried out to determine the appropriate distance between the emitters should be 30 cm. Hydrus-2D numerical model was performed to estimate the hydraulic parameters of stony soil and simulate the soil water distribution characters of surface drip infiltration under different emitter discharge rates and lateral pipeline layout distance styles. According to the simulated wetted body feature and grape root distribution character,the rational discharge rates should be between 2.5 L/h and 3.0 L/h,and the reasonable lateral spacing of drip irrigation pipeline should be 60 cm. The results can provide some guidelines for scientific design and rational filed layout of grape irrigation system under stony soil.