干旱区研究

• 天气与气候 • 上一篇    下一篇

近20 a云雾山草地生产力对气候变化的响应

 罗瑞敏1 , 郭梁2* , 程积民1,2,3   

  1. (1. 西北农林科技大学动物科技学院,陕西 西安 712100;2. 西北农林科技大学水土保持研究所,陕西 西安 712100;3.中国科学院水利部水土保持研究所,陕西 西安 712100)
  • 收稿日期:2017-01-18 修回日期:2017-02-23 出版日期:2018-01-15 发布日期:2018-02-06
  • 通讯作者: 郭梁. E-mail:guoliang2014@nwsuaf.edu.cn
  • 作者简介:罗瑞敏(1992-),女,硕士研究生,主要从事气候变化与草地生态系统响应研究. E-mail:luo271929@126.com
  • 基金资助:

    国家自然科学基金(41701606),中国博士后科学基金(2016M590974),国家重点研发计划(编号:2016YFC0500704)陕西省自然科学基础研究计划(2017JQ3015) 资助

Responses of grassland productivity to climate variability at Yunwushan during the past 20 years

 Luo Rui-min1 , Guo Liang2 , Cheng Ji-min1,2,3   

  1. (1. College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China;2. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi, 712100, China;3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resource, Yangling, Shaanxi, 712100,China)

  • Received:2017-01-18 Revised:2017-02-23 Online:2018-01-15 Published:2018-02-06

摘要: 研究云雾山典型草原生产力与气候变化的关系,制定合理应对措施,是云雾山植被重建和生态环境恢复的重要保障。本文基于1992-2011年气候数据和相应的草地生产力调查资料,分析了云雾山草地生产力、气候生产潜力变化特征及其与温度和降水变化的关系。结果表明:1近20a来研究区年平均气温显著升高,冬春季增温高于夏季;年降水呈下降趋势,但未达显著水平,仅7月降水量显著下降。2夏季增温及干旱导致云雾山草地生产力及气候生产潜力下降,此外,冬季增温也抑制草地生产力的提高。3研究区气候资源利用率为53%,尚有一半的生产潜力有待开发;适度利用、改良草场,增加人工草场培育是进一步提高草地生产力的有效途径。

关键词: 宁夏云雾山自然保护区, 草地生产力, 气候生产潜力, 气候变化

Abstract: Studying the relationship between grassland productivity and climate variation plays an important role on the countermeasure draft, and vegetation and ecological restoration at Yunwushan. Based on long- term climatic data and productivity records of Yunwushan grassland on the Loess Plateau during 1992-2011, grassland productivity, potential climate productivity trends and their correlations with climate variation were analyzed. The results indicated that: 1) During the past 20 years, annual mean temperature increased significantly, with higher increases of temperature in winter and early spring than in summer. Annual precipitation did not show a statistically significant trend, however, rainfall decreased significantly in July. 2) Warming and drought in summer decreased the productivity and potential climate production of grassland, while temperature increases in winter also decreased them. 3) The ratio between grassland productivity and potential climate productivity was 53% which indicated another half increasing chance for grassland production. Proper use and improvement of natural grassland, and development of artificial pastures will further increase the productivity for grassland on the Loess Plateau.

Key words: Ningxia yunwushan nature reserve, grassland productivity, potential climate productivity, climate change