不同灌排模式下水稻水分利用效率分析

Analysis of Water Use Efficiency under Different Irrigation and Drainage Modes

【目的】探寻不同灌排模式下水稻水分利用效率。【方法】采用不同灌排模式下的水稻田间试验,研究了浅湿灌溉、控制灌溉、控制灌排3种不同灌排模式下水稻需水规律。【结果】不同灌排模式下水稻需水量变化较大,浅湿灌溉的需水总量分别比控制灌溉和控制灌排多5.72%和8.66%。不同灌排模式对水稻产量及水分利用效率有明显影响,控制灌溉与控制灌排和浅湿灌溉相比,产量分别增加6.59%和5.57%。【结论】控制灌排在保证水稻高产的同时,灌溉水分利用效率高,节水效果好。

【Objective】Explore the water use efficiency of rice under different irrigation and drainage modes. 【Method】According to the field experiment, three different irrigation and drainage modes was studied, including shallow wet irrigation, controlled irrigation, and controlled irrigation and drainage.【Result】The water requirement of rice under different irrigation and drainage modes changed greatly, the total amount of water needed for shallow wet irrigation was 5.72% and 8.66% more than that of the control irrigation and control irrigation. Different irrigation and drainage models had significant effects on rice yield and water use efficiency. Controlled irrigation, compared with controlled irrigation and drainage and shallow wet irrigation, the yield increased by 6.59% and 5.57%, respectively.【Conclusion】Irrigation and drainage control in ensuring high yield of rice, irrigation water use efficiency, water-saving effect is good.