种植密度对不同株型玉米生理特性及光合产物的影响  

Effect of Density on Physiological Characteristics and Accumulation of Photosynthesis Product of Different Maize Plant Type

作　　者：唐建华[1] 齐华[1] 张卫建[2] 于吉琳[1] 宋振伟[2] 刘颖[1] 郑成岩[2] 

机构地区：[1]沈阳农业大学农学院,沈阳110161 [2]中国农业科学院作物研究所,北京100081

出　　处：《沈阳农业大学学报》2013年第1期13-19,共7页Journal of Shenyang Agricultural University

基　　金："十二五"国家科技支撑计划项目(2011BAD16B14;2012BAD04B03);国家重点基础研究发展计划(973计划)项目(2009CB118601)

摘　　要：研究了种植密度对紧凑型玉米品种(郑单958和先玉335)和平展型玉米品种(丹玉39和沈单16)光合产物积累以及生理特性的影响。结果表明:4个品种随着密度的增加,叶向值、叶面积指数呈上升的趋势,而净光合速率、干物质积累及SPAD则呈下降的趋势,说明高密度群体造成光分布不合理,叶片衰老快。不同品种对密度的反应不同,紧凑型玉米品种在种植密度为67500株.hm-2下获得高产,其郑单958和先玉335的产量分别为12159.85 kg.hm-2、11134.734 kg.hm-2;平展型玉米品种在种植密度为45000株hm-2下获得高产,其丹玉39和沈单16的产量分别为8514.483 kg.hm-2、8428.35 kg.hm-2,表明在高密度条件下,紧凑型玉米品种干物质积累及最大增长速率均大于平展型玉米品种。The effect of planting density of Compact Maize（Zhengdan958 and Xianyu335） and Peace Maize （Danyu39 and Shendanl6）on accumulation of photosynthetic products and the physiological characteristics. The results showed that with the density increasing the leaf orientation value, leaf area index of the four varieties had upward trend, net photosynthetic rate, dry matter accumulation and SPAD showed a downward trend. In high density groups light was caused by unreasonable distribution, leaf senescence was quick. Different varieties of the density response were different, the compact type was more suitable for high density planting. In the case of high density, dry matter accumulation and maximum growth rate were larger than that of the fiat type maize varieties.

关 键 词：玉米 密度 株型 光合产物 生理特性 

分 类 号：S513.047[农业科学—作物学]