ACTA AGRICULTURAE BOREALI-SINICA ›› 2011, Vol. 26 ›› Issue (5): 174-180. doi: 10.7668/hbnxb.2011.05.035

Special Issue: Corn Rice

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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

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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Cite this article

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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