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种植密度对甜高粱冠层结构光合特性和产量形成的影响

Effects of Plant Density on Photosynthetic Characteristics of Canopy Structure and Yield of Sweet Sorghum

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【作者】 邓志兰王振国崔凤娟李岩李默徐庆全于春国

【Author】 DENG Zhi-lan;WANG Zhen-guo;CUI Feng-juan;LI Yan;LI Mo;XU Qing-quan;YU Chun-guo;Tongliao Academy of Agricultural Sciences;

【通讯作者】 徐庆全;

【机构】 通辽市农业科学研究院

【摘要】 为筛选出适宜通辽地区甜高粱的种植密度,对内蒙古首个甜高粱品种通甜1号在5个不同种植密度下对叶面积指数、单株干物质积累、冠层结构性状、冠层叶片叶绿素含量、光合速率冠层结构光合特性和产量的影响进行了研究。结果表明:同一生育期内,群体叶面积随着密度的增加而增加,抽穗期以后高密度处理下的叶面积指数下降迅速,低密度处理下的叶面积指数下降较为缓慢。整个生育期内以密度为9.0万株·hm-2,干物质的积累量最大,各器官的同化物分配量最高,有利于生物产量的积累。高密度冠层顶部叶倾角小,叶向值大,叶片相对挺直。

【Abstract】 In order to select the suitable planting density of sweet sorghum in Tongliao area,the effects of five densities treatments on leaf area index,dry matter accumulation,canopy structure traits,chlorophyll content,photosynthetic rate and yield formation of Tongtian No.1,the first sweet sorghum cultivar in Inner Mongolia,were studied.The results showed that canopy leaf area were increased with planting density during the same growth stage.After the heading stage,leaf area index rapidly descend at high densities,and leaf area index slowly descend at low densities.When the plant density was at the ranges of 90 thousands plants·hm-2,accumulation of dry matter have reached a higher level,the homogenization of each organ was the highest,and conducive to the accumulation of biological production.Small leaf angle,large leaf to value and blade is comparatively erect at canopy top.

  • 【文献出处】 黑龙江农业科学 ,Heilongjiang Agricultural Sciences , 编辑部邮箱 ,2019年03期
  • 【分类号】S566.5
  • 【被引频次】8
  • 【下载频次】222
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