化控技术对玉米植株抗倒伏性状、农艺性状及产量的影响

以不同抗倒伏性的2个品种为材料,研究了化控技术对玉米植株抗倒伏性状、农艺性状及产量的影响。结果表明,化学调节剂能降低植株高度、穗位下部节间长度、穗高系数,节间直径、茎粗系数、干重、干物质百分比、单位茎长干物重、粗纤维含量、气生根和总根数显著增加。茎秆抗倒伏性状与农艺性状密切相关,化控处理降低了空秆率和秃尖长,提高了行粒数和穗粒重,最终提高了产量。化控处理对非抗倒伏品种郑单958的产量增加尤为明显。

Effects of Chemical Regulator on the Lodging Resistance Traits,Agricultural Characters and Yield of Maize

Effects of chemical regulator on the lodging resistance, agriculture characters and yield of maize were investigated using two maize cultivars differing in lodging resistant ability, Jinhai No.5(the lodging resistant), Zhengdan958(the lodging). Two treatments were imposed, chemical regulator and CK. The result showed that spraying Yuhuangjin, plant height, the length of internodes below ear, ear height index were shortened, would cause significant increases in internode diameter, stem diameter index, dry weight, percentage of dry matter, ratio of dry matter weight to length of internode, crude fibre content, brace root and total No. of root. The stalk lodging resistance traits were highly correlated with the agronomic characteristics. In addition, because of the decrease of no-ear plant rate and length of bare ear and the increase of kernel number per row and kernel weight per ear, the yield was increased, and significant of Zhengdan958.