华北农学报 ›› 2011, Vol. 26 ›› Issue (5): 174-180. doi: 10.7668/hbnxb.2011.05.035

所属专题: 玉米 水稻

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不同种植密度对超高产稻田春玉米产量性状及光合生理特性的影响

李小勇1, 唐启源1, 李迪秦1, 李维科2, 李海林2, 蔡庆红1   

  1. 1. 湖南农业大学农学院, 湖南长沙, 410128;
    2. 广西农业科学院水稻研究所, 江苏南宁, 530007
  • 收稿日期:2011-06-23 出版日期:2011-10-28
  • 通讯作者: 唐启源( 1964-) ,男,湖南洞口人,教授,博士,博士生导师,主要从事作物超高产理论与技术研究。
  • 作者简介:李小勇( 1975-) ,男,湖南永州人,博士研究生,主要从事作物高产与资源高效利用理论与技术研究。
  • 基金资助:
    国家“十一五”科技支撑计划(2006BAD02A13-4)

Effects of Different Plant Densities on the Photosynthetic-Physiological Characters and Yield Traits in Spring Maize Grown on Super-High Yielding Paddy Field

LI Xiao-yong1, TANG Qi-yuan1, LI Di-qin1, LI Wei-ke2, LI Hai-lin2, CAI Qing-hong1   

  1. 1. College of Agronomy, Hunan Agricultural University, Changsha 410128, China;
    2. Rice Research Institution, Guangxi Academy of Agriculture Sciences, Nanning 530007, China
  • Received:2011-06-23 Published:2011-10-28

摘要: 通过不同种植密度对"紧凑型"品种超试1号的群体光合生理性能及产量性状进行研究。结果表明,在6.75~9.75万株/hm2密度范围内,随着种植密度的增加,群体叶面积指数(LAI)显著增大,光合势(LAD)增加,冠层的光合有效辐射(PAR)的截获率增大,但叶片叶绿素相对含量(SPAD)降低和比叶重(SLW)下降;在灌浆期穗位叶PSⅡ反应中心光化学淬灭系数(qP)和非光化学淬灭系数(qN)随密度的增加而提高,但在高密度(D3)条件下PSⅡ光合量子产量(EQY)降低和电子传递速率(ETR)较低,表明其光能转化效率降低,而单株干物质积累速率随密度的增加则呈现降低趋势;但在群体干物质积累量(QDMC)表现为升高趋势,产量随密度的加大而提高,但同时导致每穗粒数和千粒重下降。

关键词: 种植密度, 春玉米, 产量性状, 光合生理特性

Abstract: This study was conducted for the purpose in detecting the effects of different plant densities on photosynthetic-physiological characters and yield traits of the "compact-type" maize variety Chaoshi No.1 grown in spring season on a super-high yielding paddy field.The results showed that in the range of plant densities from 67 500-97 500 plants/ha,with increasing of plant density,population leaf area index(LAI),leaf area duration(LAD),and capture efficiency of photo-synthetically active radiation(PAR)of canopy increased correspondingly;the relative chlorophyll content(SPAD)and spicel leaf weight(SLW)decreased on the contrary;and the photo-chemical quenching(qP)and non-photo-chemical quenching(qN)of ear-nod leaf at grain filling stage increased,too.Under high plant density(D3)condition,the effective quantum yield(EQY)of ear-nod leaf and the electron transport rate(ETR)showed low,indicating slow-down of the sunlight energy transformation efficiency;the speed of dry matter accumulation(DMC)of a single plant decreased,but the population DMC and grain yield increased;the grain No.per ear and 1000-grain weight decreased.

Key words: Plant density, Spring maize, Yield characters, Photo-physiological character

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引用本文

李小勇, 唐启源, 李迪秦, 李维科, 李海林, 蔡庆红. 不同种植密度对超高产稻田春玉米产量性状及光合生理特性的影响[J]. 华北农学报, 2011, 26(5): 174-180. doi: 10.7668/hbnxb.2011.05.035.

LI Xiao-yong, TANG Qi-yuan, LI Di-qin, LI Wei-ke, LI Hai-lin, CAI Qing-hong. Effects of Different Plant Densities on the Photosynthetic-Physiological Characters and Yield Traits in Spring Maize Grown on Super-High Yielding Paddy Field[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2011, 26(5): 174-180. doi: 10.7668/hbnxb.2011.05.035.

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