喷施不同复方调节剂对小麦后期衰老生理的影响

在冬小麦生育中后期喷施不同复方调节剂调节地上、地下部生理活性,复方Ⅰ、复方Ⅳ显著提高了小麦的根系活力、叶片的叶绿素含量和SOD活性,降低了叶片中的MDA含量,推迟了丙二醛高峰的出现,与对照相比,复方Ⅰ推迟叶片变黄2～3d,复方Ⅳ推迟3～4d,延缓小麦后期的生理衰退速率,使千粒重和产量增加。

Effects of Spraying Different Compound Regulators on Senescence Physiology of Wheat During Middle to Late Stages

Different compound regulators were sprayed during middle to late stages to winter wheat to regulate physiology activity of the underground and aboveground.The compoundⅠ,Ⅳraised obviously the activity of the root system,the content of chlorophyll,the SOD activity and dropped the content of MDA and delayed the emergence of the peak of MDA.Comparing with con-trol,the compoundⅠand the compoundⅣdelayed the time that leaves changed to yellow for2～3d and3～4d respectively.The two compounds cound decrease the rate of physiology senescence during late stage and increased the1000-grain-weight and the yield.