糯玉米鲜穗采收期主要群体性状分析

Analysis of Chief Group Properties During Harvesting Time of Waxy Corn’s Fresh Ear

糯玉米群体的双穗率、空秆率、倒伏率、穗位高等主要群体性状均受种植密度和施氮量的显著影响。随种植密度的增加,糯玉米双穗率显著降低、空秆率明显增加、倒伏率极显著提高、穗位高有所增加;随施氮量的增加,糯玉米双穗率先增后降、空秆率显著增加、倒伏率明显增大、穗位高表现一定的增加趋势;种植密度和施氮量对主要群体性状的影响表现出明显的交互效应;进一步的相关分析表明,除种植密度与双穗率呈极显著负相关、施氮量与穗位高的相关性不显著外,种植密度、施氮量与糯玉米主要群体性状均呈极显著正相关关系。

Both planting density and amount of nitrogen fertilization have significant effect on chief group properties of two-ear rate, blank-stem rate, lodging percentage and ear＇ s height. With increasing planting density, two-ear rate yields a significant decrease while blank-stem rate, lodging percentage and ear＇ s height go up to perspective degrees. With increasing amount of nitrogen fertilization, two-ear rate decreases after initial increase while blank-stem rate, lodging percentage and ear＇ s height go up to perspective degrees. There＇ s a significant interaction effect on chief group properties between planting density and amount of nitrogen fertilization. The further study indicates that planting density and two- ear rate have a significant negative correlation; amount of nitrogen fertilization and ear＇ s height have no significant correlation; planting density, amount of nitrogen fertilization and chief group properties of waxy corn have a significant positive correlation.