华北农学报 ›› 2013, Vol. 28 ›› Issue (2): 180-185. doi: 10.3969/j.issn.1000-7091.2013.02.032

所属专题: 玉米

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玉米不同冠层结构下产量及水氮利用效率分析

吕丽华1, 贾秀领1, 梁双波1, 王璞2   

  1. 1. 河北省农林科学院 粮油作物研究所, 河北 石家庄 050035;
    2. 农业部作物栽培与耕作学重点实验室, 中国农业大学 农学与生物技术学院, 北京 100094
  • 收稿日期:2012-10-27 出版日期:2013-04-28
  • 通讯作者: 王璞(1957-),男,山西朔州人,教授,博士生导师,主要从事作物高产与资源高效利用研究。贾秀领(1964-),女,河北正定人,研究员,博士,主要从事作物栽培生理研究。
  • 作者简介:吕丽华(1977–),女,河北景县人,助理研究员,博士,主要从事作物高产与资源高效利用研究。
  • 基金资助:
    农业部公益性行业专项(201203100);河北省财政项目(2012055002);河北省科技支撑计划项目(11220201Z;11220202D)

Yield, Water and Nitrogen Use Efficiency under Different Canopy Structure

Lü Li-hua1, JIA Xiu-ling1, LIANG Shuang-bo1, WANG Pu2   

  1. 1. Institute of Cereal and Oil Crops, Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang 050035, China;
    2. Key Laboratory of Crop Cultivation and Farming System, Ministry of Agriculture, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100094, China
  • Received:2012-10-27 Published:2013-04-28

摘要: 研究了种植密度对夏播玉米(CF008、郑单958和金海5号)冠层、产量及水氮利用效率的影响,通过密度调控,构建高效冠层,发挥品种潜力,实现高产和高水氮效率同时提高。结果表明,低中密度条件下冠层结构合理,穗位层透光率较高,植株LAI发展符合中稳、后衰慢的动态,穗粒数和产量较高。耗水量随密度增加而增加,而水分利用率(WUE)随密度增加而先升后降,为中密度下较高。地上部总氮量、氮素吸收效率和氮肥利用率与种植密度并不呈正比,3个品种夏玉米各项氮效率指标均为低或中密度处理较高。可见,适当增加种植密度可以提高产量和水氮利用效率,但密度增加有一定的上限范围,过高反而不利于产量和水氮效率的提高。

关键词: 夏玉米, 密度, 产量, 水分利用效率(WUE), 氮效率

Abstract: The experiment was employed with main plot of plant density(low,medium,and high respectively),sub-plot of cultivar(CF008,Zhengdan 958,Jinhai 5 respectively),studied the effect of different density on canopy structure,yield,water use efficiency(WUE) and recovery of N fertilizer(RNF). The objective to obtain high yield,high water and N efficiency simultaneously through regulating canopy structure under suitable planting density. The main results showed that the high-yielding canopy structure was obtained under both low and medium densities of the three cultivars. Percent transmission of ear layer leaf was high,and LAI developmental dynamic were rational,andgrain yield andgrain number per ear were high because of the even light distribution within canopy under both low and medium densities. Water consumption increased with the increase in density,but WUE was higher under medium density. Shoot N,N uptake efficiency(NUPE),N use efficiency(NUE),and RNF were significantly higher under low or medium densities for three cultivars. Our results confirmed that proper higher planting density can in-creasegrain yield and efficiency of water and N,and proper planting density of CF008,Zhengdan 958 and Jinhai 5 were below 11. 25×104,9.75×104,8. 25×104plants/ha respectively.

Key words: Summer maize, Density, Grain yield, WUE, Nitrogen efficiency

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引用本文

吕丽华, 贾秀领, 梁双波, 王璞. 玉米不同冠层结构下产量及水氮利用效率分析[J]. 华北农学报, 2013, 28(2): 180-185. doi: 10.3969/j.issn.1000-7091.2013.02.032.

Lü Li-hua, JIA Xiu-ling, LIANG Shuang-bo, WANG Pu. Yield, Water and Nitrogen Use Efficiency under Different Canopy Structure[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(2): 180-185. doi: 10.3969/j.issn.1000-7091.2013.02.032.

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