ACTA AGRICULTURAE BOREALI-SINICA

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Accumulation and Distribution of Dry Matter under the Conditions of Saturated Irrigation in Maize Varieties Released in Different Eras

XIU Wen-wen1, CHEN Chuan-xiao1, TIAN Xiao-dong1, LIU Xin1, ZHANG Yi-ming1, LI Shao-kun2, ZHANG Feng-lu1   

  1. 1. Key laboratory of Crop Growth Regulation of Hebei Province,College of Agronomy,Agricultural University of Hebei,Baoding 071001,China;
    2. Institute of Crop Sciences,Chinese Academy of Agriculture Sciences,Beijing 100081,China
  • Received:2012-07-30 Published:2012-12-31

Abstract: Experiment was conducted in glasshouse in Agricultural University of Hebei during 2010 - 2011 .The characters of dry matter accumulation and distribution of varieties from different eras were studied under saturated irrigation conditions, with 6 maize cultivars released from 1950s Baihe, Jidan 101 , Zongdan 2, Yedan 13 ,Zhengdan 958 and Xianyu 335. The result showed that: Modern varieties had higher dry matter accumulation due totheir late leaf senescence. With the replacement of varieties, translocation of photosynthate was increased and dryweight and allocation proportion of ear in maturing stage was also gradually increased. Root weight increased from1950s to 1980s but decreased for modern maize varieties. Relative small root decreased the root redundancy andlowered the photosynthate consumption on roots. Compared with the early varieties the modern maize possess highLAI and lower redundancy waste so the high harvest index was reached, The study is of great importance in makingclear the mechanism of the high yielding for modern maize and realizing good quality, high yield and high efficiencyof maize production.

Key words: Maize, Accumulation and distribution of dry matters, Varieties of different eras, Root-shoot ratio

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Cite this article

XIU Wen-wen, CHEN Chuan-xiao, TIAN Xiao-dong, LIU Xin, ZHANG Yi-ming, LI Shao-kun, ZHANG Feng-lu. Accumulation and Distribution of Dry Matter under the Conditions of Saturated Irrigation in Maize Varieties Released in Different Eras[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.3969/j.issn.1000-7091.2012.z1.035.