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《China Rice》 2018-03
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Effects of Different Irrigation Methods on Yield and Water Use Efficiency of Rice in Different Soil Types

CHEN Mengyun;LI Xiaofeng;CHEN Yufei;REN Hongru;WANG Wei;JING Peipei;HUO Zhongyang;Yangzhou University/Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture/Jiangsu Province Key Laboratory of Crop Genetics and Physiology;  
In order to discuss the influence of different irrigation methods on yield and water use efficiency of rice, an experiment was conducted in loam, clay, sand, using japonica rice Nangeng 9108 as material. The results showed that compared with the water layer irrigation treatment(CK), mild water saving irrigation treatment(soil water potential -15 k Pa)and severe water saving irrigation treatment(soil water potential -25 kPa) significantly improved rice yield and water use efficiency in the condition of loam and clay, the grain yield of mild water saving irrigation treatment were increased by 13.89% and 10.96%, the grain yield of severe water saving irrigation treatment were increased by 7.02% and 6.61%, the water use efficiency of mild water saving irrigation treatment were increased by 32.0% and 26.0%, the water use efficiency of severe water saving irrigation treatment were increased by 29.0% and 26.0%, respectively; in the condition of sand, the yield of mild saving irrigation treatment and severe water saving irrigation treatment were significantly lower than CK, but the water use efficiency was improved, the yield of mild water-saving irrigation treatment was reduced by 5.67% compared with CK, water use efficiency was increased by 18.0%; the yield of severe water saving irrigation treatment was reduced by 11.22%, water use efficiency was increased by 21.0%. The results showed that in the condition of loam and clay, the mild water saving irrigation could increase the dry matter accumulation, photosynthetic potential, population growth rate and net assimilation rate of the aboveground population, eventually increase the grain yield.
【Fund】: 国家重点研发计划项目(2016YFD0200805);; 江苏“农业三新”工程项目(SXGC[2016]321);; 江苏农业科技攻关(BE2015340 BE2016351);; 江苏省农业科技自主创新项目(CX[15]1002)
【CateGory Index】: S274;S511
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