Abstract: In order to study the potential in the dry land of high-yield winter wheat, we create condit ions in dry land to study on the effects of different supplementary irrigation times on the flag leaf senescence in late growth stage at the vi-l lage of Fenggezhuang, Laiyang( ever many t imes made above 9 000 kg/ ha yield in dry land).The results showed obviously regulated the flag leaf senescence in dry land. With increasing of the times of supplementary irrigation, increased the leaf area index, on W2 level, delayed the decreasing of the content of chlorophyll, decreased the content of MDA, increased the content of the POD and CAT, delayed the senescence of the flag leaf and reached high yield level 9 310. 20 kg/ ha. Increased continuously the times of the supplementary irrigation, the activity of the SOD, CAT and POD had little rate of increase amplitude. In later grain filling stage, even had decreasing trend. In this treatment, the yield ofW2 was the highest. Increased continuously the times of the supplementary irrigation, the yield began to decrease, even lower than CK, it showed that the dry land had much more ability of the water storage and moisture conservation by a certain agronomic measures. Reach ??the dry land don??t drought?? on certain degree.

Key words: Wheat, Different supplement irrigation, Dry land, Senescence, Flag leaf

CLC Number: 

• S152.7