氮肥运筹对玉米苏玉19产量形成的作用  

Nitrogen menagement on yield formation of corn cultivar Suyu 19

作　　者：薛林 陆卫平[2] 陆虎华 黄晓兰 印志同 

机构地区：[1]江苏省沿江地区农业科学研究所,江苏如皋226541 [2]扬州大学江苏省作物遗传生理重点实验室,江苏扬州225009

出　　处：《扬州大学学报（农业与生命科学版）》2006年第1期58-61,共4页Journal of Yangzhou University：Agricultural and Life Science Edition

基　　金：国家自然科学基金资助项目(30270831)

摘　　要：在总施氮量为270kg·hm^-2、基苗肥与穗肥比为1：2的条件下，基苗肥设基施、4叶展施2个处理，穗肥设8叶、10叶和12叶展施3个处理，研究氮肥运筹对苏玉19产量形成的作用。结果表明：基施配合穗肥8叶展施处理产最最高，比其他处理极显著增产．增产幅度为13．03％～30．19％，其中施基肥处理比施苗肥处理增产15．14％；穗肥8叶展施比穗肥10叶、穗肥12叶展施分别增产7．44％和15．90％。增产主要归因于促进壮苗早发、堵壮茎秆、增加气生根数和总粒数、提高粒叶比，从而提高群体的物质积累量和籽粒产量。The objective of this study was to investigate the effect of nitrogen management on yield formation of corn eultivar Suyu 19. 270 kg N per hectare was appiled and the ratio of basal or seedling to ear nitrogen fertilizer was 1 ： 2. Basal or seedling fertilizer was applied as basal and at leafage 4, and ear fertilizer was applied at leafage 8, 10 and 12, respectively. Resultsshowed that basal combined with ear fertilizer at leafage 8 significantly increased grain yield and the overall yield increase was 13.03%-30. 19%, compared to that in other treatmens. Grain yield was 15.14% higher in treatment with nitrogen applied as basal than that with nitrogen applied at leafage 4. Nitrogen applied at leafage 8 increased grain yield by 7.44% and 15. 14%, compared to nitrogen applied at leafage 10 and 12, respectively. More vigorous seedlings, stronger stalk, more brace roots and kernels, higher ratio of grain to leaf and improved dry mater accumulation contributed to the yield enhancement when nitrogen applied as basal and at leafage 8.

关 键 词：玉米 氮肥运筹 产量 

分 类 号：S513.048[农业科学—作物学]