干旱地区农业研究2011，Vol.29Issue(4)：19-22,28,5.
节水灌溉对小麦旗叶主要光合参数和水分利用效率的影响
Effects of water-saving irrigation on some photosynthetic functions and water use efficiency in wheat
摘要
Abstract
A field experiment for effects of water stress on photosynthetic functions was conducted in Jinan , Shandong , China (36 42 N . 117 04 E) for wheat growing seasons during 2007'^'2009 . There were four irrigation treatments . No irrigation (Wo ) , one irrigation at jointing stage (Wi) , two irrigations at jointing and anthesis stage (W2 ),three irrigations at over-wintering , jointing and anthesis (W3 ) . Each irrigation supplied water of 60 mm . The results showed that, during the period of grain filling (7 d after anthesis ) , the photosynthetic indexes of flag leaf including the maximum pho- tochemical efficiency (ft Ifm) , the actual photochemical efficiency of photosystem II ( (φ)>sn ) and the photochemical quenching coefficient (qp ) were obviously higher with adding irrigation and net photosynthetic rates were significantly in- creased . There were linear relationship between leaf stomatal conductance , intercellular CO2 concentration and transpiration rate . There were significant changes in the maximal efficiency of PS II photochemistry and apparent damages in PS II reaction centre , its oxidising and acceptor sides , or its antennae system for Wo . This was shown by the decrease in the efficiency of excitation energy capture by open PS II reaction centers and the quantum yield of PS II electron transport and a significant decrease in non-photochemical quenching . However , got the highest WUE in four treatments , while the dry matter accumulation and grain yield in W3 were higher than those in other treatments . Photosynthetic rate , transpiration rate and water use efficiency were significantly correlated .关键词
小麦/光合速率/蒸腾速率/水分利用效率Key words
wheat/ photosynthetic rate/transpiration rate/water use efficiency分类
农业科技引用本文复制引用
李升东,王法宏,司纪升,孔令安,张宾,冯波..节水灌溉对小麦旗叶主要光合参数和水分利用效率的影响[J].干旱地区农业研究,2011,29(4):19-22,28,5.基金项目
国家现代农业产业技术体系(CARS-3-1-21):公益性行业(农业)科研专项经费项目课题任务书(200903007-03) （CARS-3-1-21）
"小麦伟育种与栽培学"泰山学者岗位(GW200510011) （GW200510011）
农业科技成果转化资金项目(2008GB2c600165) （2008GB2c600165）
农业科技成果转化资金项目(05EFN213700156) （05EFN213700156）
