烯效唑延缓小麦成熟期间叶片衰老的效应

１９８９～１９９２年田间与盆栽试验，研究烯效唑对小麦成熟期间旗叶及下二叶等三片功能叶衰老的延缓作用和增产效果。研究表明：１．烯效唑延缓小麦成熟期间功能叶片的衰老，表现在叶片细胞电解质渗漏率降低，超氧物歧化酶活性增高，丙二醛积累减少；２．烯效唑对离休旗叶片有保绿作用；于小麦齐穗期喷施２０～４０×１０－６，烯效唑药液７５０ｋｇ／ｈｍ２，可提高小麦千粒重３～４ｇ，增产１２％～１６％。

Retarding Effect of S-07 on Wheat Leaf Senescence During Ripening Stage

In pot and field experiment in 1989-1992,the retarding effect of S-07 on senescence of wheat leaves (flag leaf, No 2 leaf, N0. 3 leaf )during ripening stage, and the yield increasing effect were studied. The results were as follows: 1. The leaf senescence during ripening stage was associated with increases of electrolytic leakage and MDA content of leaves, and also related with decreases of chlorophyll content and SOD activities. The physiological changes were retarded when neated by S-07. 2. The rate of chlorophyll degradation of flag leaf floated on S-07 solution was delayed under dark condition. 3. The photosynthesis rate of wheat plants was enhanced when treated by S-07 spraying. 4. The grain yield was increased around 12-16 % and 1000-grain weight increased 3-4g, when 20-40ppm S-07 solution was sprayed at heading stage with 750kg/ha.