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Changes of Radiation Use Efficiency of Spring Maize under Different Plant Densities in Xinjiang
Author(s): 
Pages: 2166-2172
Year: Issue:  12
Journal: Xinjiang Agricultural Sciences

Keyword:  spring maizeradiation use efficiencyplant densityleaf area indexyield;
Abstract: [目的]研究新疆春玉米不同种植密度下光截获率的变化,探讨通过改进栽培措施,提高作物光能利用率进而提高产量的技术途径.[方法]选用新疆当地推广玉米品种新玉41号、较耐密性品种中单909为材料,设置3个种植密度处理,分别为4.5 ×104、7.5 ×104和10.5×104株/hm2;分别在玉米生长的拔节期、抽雄期、吐丝期、乳熟期、蜡熟期测定不同密度下玉米冠层光截获率、生物量累积等,计算光能利用率.[结果]随种植密度的增加,玉米叶面积指数增大,冠层光截获率增加,玉米光能利用率增加.在适宜种植密度范围内,光能利用率与作物生长率、籽粒产量呈线性关系.[结论]冠层有效光截获量是影响玉米干物质积累的主要因素,玉米叶面积指数对光能利用率和作物群体生长率有一定的影响,通过增加种植密度提高玉米的光能利用率及籽粒产量.
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