辽宁农业科学Issue(3)：1-4,4.DOI:10.3969/j.issn.1002-1728.2018.03.001
种植密度对不同玉米品种干物质积累及产量的影响
Effects of Different Planting Densities on Dry Matter Accumulation and Grain Yield of Different Maize Varieties
摘要
Abstract
Setting up 5 planting densities of 4.5×104、6.0×104、7.5×104、9.0×104、10.5×104plant/hm2, using dense planting varieties: Zhengdan958, Xianyu335 and Liaodan588 as test materials, it analyzed the effects of the planting densities of maize on dry matter accumulation, leaf area index(LAI) and the agronomic traits, and studies the effecst of densities on maize yield and its composition factors to reveal the formation mechanism of maize yield.The results showed that,within the range of the experiment, with the increase of planting density, the grain yield of the different maize varieties increased at first and then decreased.The opti-mum planting density of Zhengdan958 and Xianyu335 was 6.0 ×104plant /hm2,and the Grain yield were 12 698 kg/hm2and 13 706 kg/hm2respectively.The optimum planting density of Liaodan588 was 9.0×104 plant /hm2and the Grain yield was 12 326 kg/hm2.The dynamic development trend of LAI of the different maize varieties showed a consistent trend of increasing at first and then decreasing during the whole growth pe-riod, reaching the maximum during the spinning period.With the increasing of planting densities, the dry weight of different? organs and total dry matter of single plant decreased.The dry matter weight of single plant of xianyu 335 decreased rapidly, while that of zhengdan 958 decreased slowly.关键词
玉米/种植密度/干物质/叶面积指数/产量Key words
Maize/Planting density/LAI/Dry matter/Yield分类
农业科技引用本文复制引用
邵帅,王国宏,樊勇,史磊..种植密度对不同玉米品种干物质积累及产量的影响[J].辽宁农业科学,2018,(3):1-4,4.基金项目
国家重点研发计划子课题(2017YFD0300701) （2017YFD0300701）
