Acta Agrestia Sinica

›› 2013, Vol. 21 ›› Issue (2): 236-242.DOI: 10.11733/j.issn.1007-0435.2013.02.005

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Potential Climatic Productivity of Natural Grassland in the Middle Arid Zone of Ningxia

MA Tian1,2,3, WANG Jun-bo4, ZHANG Zhi-hua5, XU Xiu-mei4   

  1. 1. College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China;
    2. Agriculture, Forestry and Animal Husbandry Technology Service Center of Ningxia Land Reclamation Bureau, Yinchuan, Ningxia 750021, China;
    3. Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;
    4. Key Lab for Restoration and Reconstruction of Degraded Ecosystem in Northwest China of National Key Laboratory Cultivation Base, Ningxia University, Yinchuan, Ningxia 750021, China;
    5. Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, Ningxia 750021, China
  • Received:2012-11-08 Revised:2013-01-20 Online:2013-04-15 Published:2013-04-23

宁夏中部干旱带天然草地气候生产潜力研究

马甜1,2,3, 王俊波4, 张治华5, 徐秀梅4   

  1. 1. 宁夏大学农学院, 宁夏 银川 750021;
    2. 宁夏农垦农林牧技术服务中心, 宁夏 银川 750021;
    3. 中国科学院植物研究所北方资源植物重点实验室, 北京 100093;
    4. 宁夏大学西北土地退化与生态 恢复国家重点实验室培育基地, 宁夏 银川 750021;
    5. 宁夏农林科学院, 宁夏 银川 750021
  • 通讯作者: 徐秀梅,takeyanaoe@163.com
  • 作者简介:马甜(1984-),女,湖南衡阳人,博士研究生,农艺师,研究方向为牧草栽培与利用,E-mail:mars1989@163.com
  • 基金资助:
    全球环境基金项目(NX-GEF-200901)资助

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Abstract: The annual potential productivity of grassland in the middle arid zone of Ningxia during 1975 to 2006 was estimated according to the ten-day period temperature and precipitation of these years (1975-2010) recorded by 10 meteorological observatories using Miami model and Thornthwaite Memorial model. The objects were to analyze the change regulation of the potential climatic productivity and provide a theoretical basis for improving grassland and increasing vegetation. Results showed that the climate in the middle arid zone of Ningxia had a change tendency toward "warm dry". The inter-annual variation range of the grassland potential climatic productivity was 2668.56～7499.53 kg·hm-2·a-1 and the potentiality was large. The grassland potential climatic productivity increased or decreased 58.68 kg·hm-2·a-1 with the maximum temperature increasing or decreasing 1℃. The grassland potential climatic productivity increased or decreased 18.64 kg·hm-2·a-1 with the annual precipitation increasing or decreasing 1 mm. The annual precipitation and potential climatic productivity in the middle arid zone of Ningxia had an extremely significant linear correlation and the correlation coefficient was 0.984～0.997, whereas the average annual temperature and potential climatic productivity did not have a significant correlation. Therefore, the natural tolerance, namely potential climatic productivity of the natural grassland of the area, should be considered when planting.

Key words: Potential climatic productivity, Middle arid zone of Ningxia, Miami model, Thornthwaite Memorial model

摘要： 依据宁夏中部干旱带同心县、盐池县等10个代表性气象台站36年(1975-2010年)逐旬气温、降水资料,基于Miami模型和Thornthwaite Memorial模型对宁夏中部干旱带1975-2006年间草地生产潜力作估算,并分析其变化规律,旨在为改良草地、植被恢复提供理论依据。结果表明:宁夏中部干旱带气候具有向"暖干化"变化的趋势,草地气候生产潜力年际变化范围为2668.56～7499.53 kg·hm-2·a-1,气候生产潜力较大。当最高温度每升高或降低1℃,草地气候生产潜力增加或降低58.68 kg·hm-2·a-1;年降水量每增加或降低1 mm,草地气候生产潜力增加或降低18.64 kg·hm-2·a-1。宁夏中部干旱带各区域年降水量与气候生产潜力相关系数为0.984～0.997,成极显著线性相关,而年均气温与气候生产潜力无显著相关性。在进行天然草地补种植物时,应考虑该地的自然承受力,即天然草地气候生产潜力。

关键词: 气候生产潜力, 宁夏中部干旱带, Miami模型, Thornthwaite Memoria模型

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