劲丰与多效唑对小麦抗倒性及产量的影响

Effects of Jinfeng and Paclobutrazol on Lodging Resistance and Yield of Wheat

小麦田间对比试验结果表明:在始穗期施用劲丰可以显著地降低小麦的株高,缩短穗茎节和倒二节的长度,增加各节间的粗度和壁厚,使小麦植株重心下移,从而提高小麦植株的抗倒伏能力;还可以增加每穗粒数和千粒重,从而比对照增产7.01%。在拔节期施用多效唑,其降低株高的效果不明显,但可以缩短基部节间的长度,增加基部节间的粗度和壁厚,使植株的重心下移,但比对照减产10.71%;劲丰在拔节期应用、多效唑在始穗期应用对小麦的株高、节间长度、节间粗度、节间壁厚度、产量等均没有显著的影响。

The results of comparative experiments in wheat field showed that applying Jinfeng at the initial heading stage could significantly decrease the plant height of wheat, shorten the length of ear - stem hurl and converse second burl, increase the width and wall thickness of each hurl, shift clown the barycenter of wheat plants, thus enhance the lodging resistance of wheat plants ; it could al- so increase the grain number per ear and 1000 - grain weight, therefore obtain 7.01% more yield than CK. Applying Paclobntrazol at the jointing stage had no obvious effect on reducing the plant height, but it could shorten the length of basal stem burls, increase the width and wall thickness of basal stem burls, move down the center of gravity of wheat plants, but acquire 10.71% less yield than CK. Both the application of Jinfeng at the jointing stage and the application of Paclobutrazol at the initial heading stage did not have obvious influences on plant height, burl length, burl width, burl wall thickness and yield of wheat.