Effects of Different Irrigation Quotas on Water Consumption Characteristics and Water Production Efficiency of Rice under Film Drip Irrigation

【Objective】 To study the effects of different water treatments on water consumption characteristics and water production efficiency of rice under film drip irrigation. 【Methods】 Five irrigation quotas were set in 2017 to compare rice yield and water consumption in different growth stages under different water treatments. 【Results】 The yield of W₅ treatment (Irrigation quota 910.00 mm) was increased by 21.95%- 458.43% compared with other treatments. The water consumption intensities of five water treatments were 3.75 - 7.14 mm /d in the whole growth period of rice under mulch drip irrigation. With the decrease of irrigation amount, the leaf area attenuation index increased gradually, the leaf showed premature senescence characteristics, and the plant height was inhibited by irrigation. Compared with other water treatments, the productivity of 7.61%-193.00% was increased. The change rule of water consumption intensity in growth stage was jointing and booting stage > heading and flowering stage > filling stage > tillering stage > mature stage > seedling stage. 【Conclusion】 Considering the water-saving and high-efficiency planting of drip irrigation rice, the suitable irrigation quota for the whole growth period of rice is 910.00 mm, which can meet the water demand of rice in the two key water demand periods of jointing booting stage and tillering stage.