南方地区非充分灌溉稻田水稻根系吸水模型研究

Root Water Uptake Models of Inadequately Irrigated Rice in South China

作物根系吸水是土壤 -植物 -大气连续体水分传输问题研究中的一个重要部分 ,同时又是根区土壤水分动态模拟必不可少的资料。本试验对非充分灌溉稻田水稻根系分布特征进行研究 ,对水稻分蘖期根系吸水进行动态模拟 ,得到非充分灌溉水稻的根系吸水模型 ,并用实测资料对模型进行验证。结果表明 。

The specificity of water uptake by plant roots is an important content in the research on water transportation in the soil-plant-atmosphere continuum,and is the necessary information for soil moisture dynamic simulation in plant root layer. The characteristics of rice roots distribution in inadequate irrigation were studied.The state of rice root absorbing water in tillering stage was simulated dynamically, the root uptake model of rice in inadequate irrigation was gained and was tested with the practical data. The results indicated that the model reflects the law of rice root uptake in tillering stage basically.