春季灌溉次数对小麦光合特性的影响

Effect of Irrigation Times on Photosynthetic Characteristics of Winter Wheat in Spring

以春季灌溉次数为主处理,以当地主栽冬小麦品种为副处理,探讨了不同水分处理对小麦叶面积、光合速率和叶绿素含量的影响。结果表明:叶面积以3水处理最大,随浇水量的增加,各品种在灌浆后期均能保持相对较大的叶面积,且旗叶光合速率和SPAD值较高。综合各小麦品种的光合特性,认为2008年以浇2水较为经济。

The effects of irrigation times on the leaf area,photosynthetic rate and chlorophyll content on the main winter wheat varieties were studied in Hengshui.The results showed that the leaf area was the largest with irrigation three times.With the increase of irrigation frequency,all varieties could maintain relatively larger leaf area at the late of filling stage,and higher photosynthetic rate of the flag leaf and SPAD value.Considering the photosynthetic characteristics of the tested varieties,irrigation two times was more economical in 2008.