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应用生态学报 ›› 2021, Vol. 32 ›› Issue (4): 1259-1268.doi: 10.13287/j.1001-9332.202104.005

• 研究论文 • 上一篇    下一篇

宁夏天然草地植被碳储量特征及构成

季波, 何建龙, 王占军, 蒋齐*   

  1. 宁夏农林科学院荒漠化治理研究所/宁夏防沙治沙与水土保持重点实验室, 银川 750002
  • 收稿日期:2020-09-21 接受日期:2021-01-24 发布日期:2021-10-25
  • 通讯作者: *E-mail: ycjqnx@163.com
  • 作者简介:季 波, 女, 1982年生, 副研究员。主要从事干旱半干旱区草地资源与草地生态研究。E-mail: nxjibo311@163.com
  • 基金资助:
    宁夏农林科学院科技平台建设提升项目(NKYP-19-06)和宁夏回族自治区全产业链创新示范项目(YES-2016-10) 资助

Characteristics and composition of vegetation carbon storage in natural grassland in Ning-xia, China.

JI Bo, HE Jian-long, WANG Zhan-jun, JIANG Qi*   

  1. Institute of Desert Manage, Ningxia Agriculture and Forestry Science Academy/Key Laboratory of Desertification Control and Soil & Water Conservation of Ningxia, Yinchuan 750002, China
  • Received:2020-09-21 Accepted:2021-01-24 Published:2021-10-25
  • Contact: *E-mail: ycjqnx@163.com
  • Supported by:
    Technology Platform Construction Promotion Program of Ningxia Agriculture and Forestry Science Academy (NKYP-19-06) and the Demonstration and Innovation of All-Industrial Chain Program of Ningxia (YES-2016-10).

摘要: 以宁夏广泛分布的温性草甸草原、温性草原、温性草原化荒漠和温性荒漠草原为研究对象,采用实地调查采样的方法,研究了宁夏天然草地植被总碳储量。结果表明: 宁夏天然草地地上植被、地下根系及主要灌木平均含碳率为0.40,枯落物平均含碳率为0.39。草甸草原、温性草原、草原化荒漠和荒漠草原的植被总碳储量分别为470.26、192.23、117.17和83.36 g·m-2,其中,地上植被碳储量分别为87.35、68.50、59.32和40.05 g·m-2,地下根系碳储量分别为344.29、108.83、50.65和30.29 g·m-2,枯落物碳储量分别为38.62、14.91、7.19和13.03 g·m-2,且均表现为草甸草原>温性草原>草原化荒漠>荒漠草原。地下根系碳储量是构成草甸草原和温性草原植被总碳储量的主体,地上植被碳储量是构成草原化荒漠和荒漠草原植被总碳储量的主体,且地下根系碳储量均随土层深度加深而递减。宁夏天然草地植被总碳储量空间分布呈现草甸草原和温性草原分布的南部区域碳储量明显高于荒漠草原和草原化荒漠分布的中北部区域。

关键词: 宁夏, 天然草地, 植被碳储量, 碳分布

Abstract: We measured the total vegetation carbon stock in the widely distributed natural grassland of meadow steppe (MS), warm steppe (WS), steppe desert (SD) and desert steppe (DS)] in Ningxia, using survey and sampling method. The results showed that the average carbon rate of vege-tation, shrubs and root were 0.40, and that of litter was 0.39. The total vegetation carbon density of meadow steppe, warm steppe, steppe desert and desert steppe (including aboveground vegetation, litter and roots) was 470.26, 192.23, 117.17 and 83.36 g·m-2, while that of aboveground vegetation was 87.35, 68.50, 59.32 and 40.05 g·m-2, and that of roots was 344.29, 108.83, 50.65 and 30.29 g·m-2, litter carbon storage was 38.62,14.91, 7.19 and 13.03 g·m-2, respectively. The order of those grassland types ranked as MS>WS>SD>DS. Root carbon storage contributed the most to carbon storage in meadow steppe and warm steppe, and aboveground vegetation carbon storage contributed the most to steppe desert and desert steppe. Root carbon storage showed a decreasing trend with the increases of soil depth within 40 cm soil layer. For the spatial distribution of total carbon stock, the southern part of meadow steppe and temperate steppe had obviously higher carbon stock than the middle and north part of desert steppe and steppe desert.

Key words: Ningxia, natural grassland, vegetation carbon storage, carbon distribution