中文摘要：

依据蒸渗仪试验资料，分析了稻田灌排耦合调控下水稻需水量变化规律。结果表明，灌排耦合模式的水稻全生育期需水量变化差异显著（p〈0．05）。与浅湿灌溉＋大田地下水埋深模式相比较，控制灌溉＋适宜地下水埋深的水稻需水量减少25．3％，控制灌溉＋控制地下水埋深模式的水稻需水量减少34．4％；灌排耦合模式的水稻阶段需水强度均有不同程度下降，以拔节孕穗期和分蘖中期降低幅度较明显；需水量模比系数呈前期小、中期大、后期又小的变化规律。不同地下水埋深对水稻需水量变化的影响未达到显著水平，以控制灌溉＋控制地下水埋深模式水稻全生育期需水量较小。

英文摘要：

Based on the lysimeter experimental data, the effect of irrigation and drainage coupling management on the variation of rice water requirement was analyzed. The results show that the irrigation and drainage coupling management has a significant influence on rice water requirement （p〈0.05）. Compared the controlling irrigation patlerns with the conuentional sufficient irrgation pattern, the water clemand of the whole rice growth in the cares of suitable or contralled groundwater table were reduced 25.3% and 34.4%, respec- tively. The rice water requirement intensity also declined, obviously at shooting-booting and mid-tillering stage. The water requirement coefficients varied from small to large, then large to small in the whole rice growth. The contrast of water requirement between the irrigation and drainage coupling management modes shows little difference between different groundwater depth, and rice need less water under the controlled mode.