Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2015, Vol. 23 ›› Issue (2): 422-425.DOI: 10.11733/j.issn.1007-0435.2015.02.031

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Effects of Nitrogen Addition on Competitive Ability and Productive Performance of Legume-Grass Mixture

ZHENG Wei1,2, Jiangaerguli1, TANG Gao-rong1, ZHU Jin-zhong1,2   

  1. 1. College of Pratacultural and Environmental Science, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China;
    2. Xinjiang Key Laboratory of Grassland Resources and Ecology, Urumqi, Xinjiang 830052, China
  • Received:2014-04-18 Revised:2014-12-09 Online:2015-04-15 Published:2015-03-25

氮素添加对豆禾牧草种间竞争力与生产性能的影响

郑伟1,2, 加娜尔古丽1, 唐高溶1, 朱进忠1,2   

  1. 1. 新疆农业大学草业与环境科学学院, 新疆 乌鲁木齐 830052;
    2. 新疆维吾尔自治区草地资源与生态重点实验室, 新疆 乌鲁木齐 830052
  • 作者简介:郑伟(1978-),男,湖北武汉人,博士,副教授,研究方向为草地生态及植物生态,E-mail:zw065@126.com
  • 基金资助:

    农业部公益性行业科研专项(201003023);中国科学院战略性先导科技专项“应对气候变化的碳收支认证及相关问题”(XDA05050405);新疆维吾尔自治区高校科研计划重点项目(XJEDU2012I19);新疆维吾尔自治区科技支疆项目(201191224)资助

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Abstract:

The influences of nitrogen (N) addition on the competitive ability and productive performance of legume-grass mixtures were analyzed in this paper. The results showed that the forage yield, CP yield and EE yield after adding N significantly increased. The productive performance of these patterns was significantly improved. The legume/grass yield, grass and legume relative density after adding N did not significantly changed, indicating that the ecological niche of legume and grass had differentiation. The competitive ability of legume decreased, whereas the competitive ability of grass increased. Therefore, the productive performance of legume-grass mixtures was improved, the competitive patterns of legume and grass was undermined after adding N.

Key words: Legume-grass mixture, Nitrogen addition, Mixed ratios of legume and grass, Productive performance, Competitive ability

摘要：

选择6种豆禾牧草和3个豆禾比进行5个N添加水平对混播牧草竞争力与生产性能影响的研究.分析2009—2011年牧草产量、营养物质产量、豆禾产量比、相对密度、相对产量总和与牧草竞争率.结果表明:牧草、粗蛋白与粗脂肪产量在添加N后显著上升,生产性能提高.豆禾产量比、相对密度在添加N后变化不明显.添加N后,豆禾牧草的生态位更加分化,豆科牧草竞争力下降,而禾草竞争力上升.添加N有利于豆禾混播草地生产性能提高,但不利于群落维持稳定的种间竞争格局.

关键词: 豆禾混播草地, N添加, 豆禾混播比例, 生产性能, 竞争力

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