作物学报 ›› 2014, Vol. 40 ›› Issue (01): 181-189.doi: 10.3724/SP.J.1006.2014.00181
• 研究简报 • 上一篇
白伟1,2,孙占祥1,*,郑家明1,侯志研1,刘洋1,冯良山1,杨宁1
BAI Wei1,2,SUN Zhan-Xiang1,*,ZHENG Jia-Ming1,HOU Zhi-Yan1,LIU Yang1,FENG Liang-Shan1,YANG Ning1
摘要:
改变玉米田间种植模式是提高玉米单产的重要措施之一。本文在大田试验条件下, 以耐密品种(郑单958)和中密品种(沈玉21)研究了三比空密疏密、大垄双行和等行距(CK) 3种种植模式对春玉米产量形成及其生长发育特征的影响。结果表明, 田间种植形式的改变可以显著影响玉米群体产量及其生长发育特征。耐密品种以大垄双行种植模式为宜, 可以增加玉米的株高、茎粗, 提高叶面积和光能利用率, 促进干物质积累, 两年平均产量为8882.36 kg hm-2, 比对照增加6.51%, 增产的原因是百粒重和穗行数的显著提高; 中密品种以大垄双行和三比空种植模式为宜, 两种种植模式均可增加玉米的株高、茎粗, 提高叶面积和光能利用率, 促进干物质积累, 且与耐密品种表现不同, 两年平均产量分别为8294.58 kg hm-2和8188.30 kg hm-2, 比对照增加21.36%和19.81%, 增产的原因是行粒数的显著增加。因此, 笔者认为在辽西地区特定的自然条件下大垄双行是提高玉米单产的最佳种植模式。
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