Effects of Different Irrigation Amounts on Physiological Indexes and Water Use Efficiency of Rice at the Jointing-booting Stage  

不同灌水量对拔节孕穗期水稻生理及水分利用率的影响（英文）

作　　者：李轲 景元书[2,3,4] 谭孟祥 薛杨[2,3,4] 

机构地区：[1]徐州市气象局,江苏徐州221000 [2]气象灾害预报预警与评估协同创新中心,江苏南京210044 [3]江苏省农业气象重点实验室,江苏南京210044 [4]南京信息工程大学应用气象学院,江苏南京210044

出　　处：《Agricultural Science & Technology》2017年第11期2014-2018,2025,共6页农业科学与技术（英文版）

摘　　要：[Objective] This study was conducted to investigate the effects of different irrigation amounts on rice leaf physiology and water use efficiency. [Method] The irrigation test with three different treatments was carried out in the Agrometeo- rological Experimental Station of Nanjing University of Information Science ＆ Technology. [Reset] Under flood irrigation, the rice leaf temperature was lower than wet irrigation by 0.4-0.7 ℃; when the strength of photosynthetically active radiation was in the range of 800-1 800 gmol/（m^2·s）, the average stomatal conductance of rice leaves under flood irrigation was higher than that of the wet irrigation treatment by 0.123-0.183 mol H2O/（m^2·s）, and the leaf water use efficiency was higher than that of the wet irrigation treatment by 0.24 g/kg; after 10：00 every day, the water use efficiency under flood irrigation was always higher than that of the wet irrigation treatment; and compared with the wet irrigation treatment, the rice of the flood irrigation treatments had higher leaf water use efficiency, and final yields were also remarkably improved by 5.89%-13.97%. [Conclusion] This study will provide a practical reference basis for field management.[目的]研究不同灌水量对水稻叶片生理及水分利用率的影响。[方法]在南京信息工程大学农业气象试验站进行了3个不同处理的灌溉试验。[结果]淹灌处理下的水稻叶温比湿润灌溉低0.4~0.7℃;当光合有效辐射强度的范围在800~1 800μmol/(m^2·s)时,淹灌处理下的水稻叶片平均气孔导度比湿润灌溉大0.123~0.183 mol H_2O/(m^2·s),叶片水分利用率高0.24 g/kg;每天10:00之后淹灌的水分利用率始终高于湿润灌溉处理;与湿润灌溉处理相比,淹灌处理的水稻不仅叶片水分利用率较高,而且最终产量也有比较明显的提升,其水稻增产量达5.89%~13.97%。[结论]该研究为田间管理提供了实际参考依据。

关 键 词：Stomatal conductance RICE Water use efficiency YIELD 

分 类 号：S511[农业科学—作物学]