氮肥运筹对高产春玉米茎节伤流强度的影响

Effects of Nitrogen Application on Root Bleeding Sap of Spring Maize

以金山27为试材,研究氮肥运筹对春玉米节间伤流强度的影响.结果表明:地上节间伤流强度在吐丝后随生育期的推移均呈下降的趋势,不同节间昼夜伤流强度表现为地上第二节>地上第四节>地上第六节;各处理间均以Opt N的伤流强度最大.相关分析得出,春玉米吐丝后31天,第二节位伤流强度与产量呈极显著正相关,第四和六节位伤流强度与产量呈显著正相关.

Jinshan 27 were used as the test material to study the effects of different nitrogen application management on the section bleeding sap of Spring Maize. The results showed that bleeding intensity in node at stem base were all the decreased trend with the advance of growing stage after silking. Bleeding intensity in different nodes were the second node at stem base〉 the fourth node at stem base〉 the sixth node at stem base the days. Bleeding intensity of Opt N was highest in different treatments. Correlation analysis showed that bleeding intensity of the second node of spring maize in 31 days after silking was very significantly and positively correlated with grain yield, bleeding intensity of the fourth node and the sixth node was significantly and positively correlated with grain yield.