Acta Agrestia Sinica

›› 2001, Vol. 9 ›› Issue (2): 79-82,86.DOI: 10.11733/j.issn.1007-0435.2001.02.001

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Effect of Grazing Pressure and Soil Fertility on Net Pasture Production of Subtropical Mountain

LI Xiang-lin, BAI Jing-ren, HAN Xue-song, GONG Zhen, HUANG Jing   

  1. 1. Institute of Animal Science, CAAS, Beijing 100094, China;
    2. Lichuan Bureau of Animal Husbandry, Hubei 445400, China
  • Received:2000-11-01 Revised:2001-02-08 Online:2001-05-15 Published:2001-05-15

牧压和肥力对亚热带山地牧草净生产的影响

李向林, 白静仁, 韩雪松, 龚真, 黄静   

  1. 1. 中国农业科学院畜牧研究所, 北京, 100094;
    2. 湖北省利川市畜牧局, 445400
  • 作者简介:李向林,(1961- ),男,甘肃人,研究员,分别于1981年1月和1985年1月在甘肃农业大学草原系获得草原专业学士和硕士学位,1996年6月在兰州大学生物系获得生态学专业博士学位.主要从事草地畜牧业研究与发展,发表论文42篇
  • 基金资助:
    “九五”国家科技攻关专题(96-016-02-02)研究内容之一

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Abstract: The effect of grazing and fertility on net pasture production(net herbage accumulation)was studied experimentally in a subtropical mountain area located in Western Hubei Province.The result of three years from 1997 to 1999 showed significant effect of post grazing residual and P level on seasonal and annual net production of the sown pasture under sheep rotational grazing.The pasture without any grazing disturbance had little net production after reaching a high level in summer.Net production was maximized by grazing management with a residual around in net production.Phosphorus applied annually at 36～60 kg/hm2 resulted in markedly increased pasture net production,particularly during late spring/early summer period when there is a high potential of pasture growth.The lowest production occurred where no fertilizer was applied.

Key words: Subtropics, Mountain, Grazing, Fertility, Net production

摘要： 在亚热带山地湿润环境条件下, 研究牧压和土壤肥力对人工草地净生产的影响。三年试验结果表明, 绵羊在轮牧下, 产草量和磷肥对全年及各月牧草净生产具有显著影响。禁牧时, 夏季地上生物量积累到一定程度后, 只有很少量的净生产。放牧时, 产草量在1000kgDM/hm2左右时, 净生产最大, 当产草量低于300kgDM/hm2以下时, 净生产量则降低。每年施一次 P2O536～ 60kg/hm2, 可以显著增加牧草净生产, 尤以春末夏初时施肥更为显著。最低产草量出现在不施肥处理

关键词: 亚热带, 山地, 牧压, 肥力, 净生产

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