作物学报 ›› 2011, Vol. 37 ›› Issue (07): 1301-1307.doi: 10.3724/SP.J.1006.2011.01301
刘伟1,张吉旺1,*,吕鹏1,杨今胜2,刘鹏1,董树亭1,李登海2,孙庆泉1
LIU Wei1,ZHANG Ji-Wang1,*,LÜ Peng1,YANG Jin-Sheng2,LIU Peng1,DONG Shu-Ting1,LI Deng-Hai2,SUN Qing-Quan1
摘要: 选用玉米品种登海661和农大108,设置不同种植密度,研究高产条件下种植密度对夏玉米产量及干物质积累与分配的影响。结果表明,种植密度增加后群体产量和干物质积累量显著增加,单株产量和干物质积累量反之。登海661在9万株 hm-2时充分发挥了生长潜能,可获高产。随种植密度的增加,开花期和乳熟期茎秆干物质积累量的降幅大于叶片,主要影响茎秆干物质积累;成熟期茎秆干物质积累量降幅小于叶片,主要影响叶片干物质积累。乳熟期以后茎秆和叶片的干物质输出率均随种植密度增加显著减少,茎秆的贡献率随种植密度增加显著减少,而叶片的贡献率,随种植密度增加显著增加。密度3~9万株 hm-2时茎秆对籽粒干物质积累量贡献率大,10.5~13.5万株 hm-2时叶片对籽粒库建成影响大。
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