%0 Journal Article
%T 密度对不同株型夏玉米光合特性与群体冠层结构的影响<br>Effect of Plant Density on Photosynthetic Characteristics and Canopy Structure of Different Plant Types of Summer Corn
%A 邬小春
%A 苏文楠
%A 韩清芳
%A 王兴义
%A 孟祥萍
%A 丁瑞霞
%A 王子煜
%J 西北农业学报
%D 2016
%R 10.7606/j.issn.1004-1389.2016.12.008
%X 为探明高产夏玉米群体光合生理基础及群体光合效率，选用紧凑型品种‘郑单958’与半紧凑型品种‘强盛101’，设置6.75×10 hm-2（D1）、8.25×10 hm-2（D2）、9.75×10 hm-2（D3）3个种植密度，研究密度对不同株型玉米光合特性、群体冠层特征与产量的影响。结果表明，夏玉米叶面积指数（LAI）与产量（Y）均随密度的增加而升高，透光率（LT）、净光合速率（Pn）、气孔导度（Gs）、PSⅡ最大光化学效率（Fv/Fm）和PSⅡ实际量子产量（YE）随密度的增加而降低，其中‘强盛101’的Fv/Fm和YE小于‘郑单958’，其他各项指标均大于‘郑单958’，在生育后期能够保持较大绿叶面积，利于有机物的积累。2个株型品种同一密度下的产量并无显著差异，同一品种不同密度下均是D1的产量显著低于D2和D3。<br>In order to explore the photosynthetic physiological basis and population photosynthetic efficiency of high-yielded summer corn, a field experiment was conducted using summer maize(Zea mays L.)‘Zhengdan 958’(a compact cultivar) and ‘Qiangsheng 101’(a semi-compact cultivar) grown at the plant densities of 6.75×10 hm-2(D1),8.25×10 hm-2(D2),9.75×10 hm-2(D3) to study the effects of plant density on photosynthetic characteristics, canopy structure and yield. The results showed that LAI and yield increased as plant density increased, while Pn, Gs, LT, Fv/Fm and YE were decreased when it was painted under high density. Fv/Fm and YE of ‘Qiangsheng 101’ were less than those of ‘Zhengdan 958’, while other indicators of ‘Qiangsheng 101’ were higher, there were larger LAI in late growth stages, which was helpful to the accumulation of organic matter. There were no significant difference in the yield of the two plant types under same density, while among three densities, the yield of D1 was significantly lower than that of D2 and D3.
%K 玉米 密度 株型 光合特性 冠层结构 产量&lt
%K br&gt
%K Corn Plant density Plant type Photosynthetic characteristics Canopy structure Yield
%U http://xbnyxb.alljournals.cn/ch/reader/view_abstract.aspx?file_no=20161208&flag=1