Acta Agrestia Sinica

›› 1997, Vol. 5 ›› Issue (1): 48-53.DOI: 10.11733/j.issn.1007-0435.1997.01.008

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Contributions of Sward Population Structure to Herbage Production in Two Growth Stages

Yang Jinzhong1, Deng Kuanhu1, Xia Jinxin2, C. Matthew3, J. Hodgson3   

  1. 1. Shanxi Agricultural University, Taigu 030801;
    2. China Agricultural University, Beijing 100094;
    3. Massey University, Private Ban 11222, New Zealand
  • Online:1997-02-15 Published:1997-02-15

不同生长阶段群体数量特征对产草量作用的分析

杨锦忠1, 董宽虎1, 夏景新2, C. Matthew3, J. Hodgson3   

  1. 1. 山西农业大学, 山西太谷 030801;
    2. 中国农业大学, 北京 100094;
    3. 梅西大学, 新西兰

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Abstract: Quantitative relationships between herbage production and sward population structure factors were studied for tall fescue in the vegetative growth stage and perennial ryegrass inthe reproductive growth stage, under same greenhouse conditions of light, temperature, irrigationand soil fertility.In vegetative stage, variability in these traits were smaller than in reproductivestage.Factor ranks in direct contributions of the factors to herbage production of swards were asfollows: leaf area index>sward height > tiller density in vegetative stage, and sward height > leafarea index> til1er density in reproductive stage.Patterns of direct and indirect contributions dif-ferent in two growth stages.All the difference above should be taken into consideration whensward production is evaluated, so that complete understandings into grassland performance mayreach.

Key words: Herbage production, Vegetative growth, Reproductive growth, Sward population characters, Path analysis

摘要： 在相同的光、温、水、肥条件下,同时对营养生长期的高羊茅和生殖生长期的多年生黑麦草人工草地的产草量和群体数量特征的定量关系进行研究。在营养生长期,参数的变异程度小于生殖生长期。营养生长期各因子对产草量直接作用的程度排序为:叶面积指数>草丛高度>分蘖密度;生殖生长期为:草丛高度>叶面积指数>分蘖密度。因子的直接作用和间接作用的格局则因生长阶段而异。上述各种差异在评价草地状况时应加以充分考虑,以获得对草地系统的全面认识。

关键词: 牧草产量, 营养生长, 生殖生长, 群体数量特征, 通径分析