草地学报

草地学报 ›› 2022, Vol. 30 ›› Issue (4): 818-824.DOI: 10.11733/j.issn.1007-0435.2022.04.006

• 生态与草原修复 • 上一篇    

若尔盖地区主要覆被类型浅层土壤持水量和有机碳关系研究

付琳玉1,2, 孙永玉1,3, 胥汝宇1, 刘文斗1, 廖声熙1, 唐国勇1,3,4   

  1. 1. 中国林业科学研究院高原林业研究所, 云南 昆明 650233;
    2. 南京林业大学, 江苏 南京 210037;
    3. 国家林业局 云南元谋荒漠生态系统定位观测站, 云南 昆明 650233;
    4. 国家林业局云南建水荒漠生态系统定位观测站, 北京 100083
  • 收稿日期:2021-09-09 修回日期:2021-11-07 发布日期:2022-04-25
  • 通讯作者: 唐国勇,E-mail:tangguoyong1980@caf.ac.cn
  • 作者简介:付琳玉(1996-),女,汉族,安徽太和人,硕士研究生,主要从事西南草地生态系统养分循环研究,E-mail:fumeiyuzi@163.com
  • 基金资助:
    中央级公益性科研院所基本科研业务费专项资金(CAFYBB2020ZA004);国家自然科学基金(31670613)资助

Study on the Relationship Between Water Holding Capacity and Organic Carbon in Shallow Soil of Main Plant Cover Types in the Zoige Region

FU Lin-yu1,2, SUN Yong-yu1,3, XU Ru-yu1, LIU Wen-dou1, LIAO Sheng-xi1, TANG Guo-yong1,3,4   

  1. 1. Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming, Yunnan Province 650233, China;
    2. Nanjing Forestry University, Nanjing, Jiangsu Province 210037, China;
    3. Yuanmou Desertification Ecosystem Research Station, State Forestry Administration of China, Kunming, Yunnan Province 650233, China;
    4. Jianshui Desertification Ecosystem Research Station, State Forestry Administration of China, Beijing, 100083, China
  • Received:2021-09-09 Revised:2021-11-07 Published:2022-04-25

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摘要： 为探究若尔盖地区浅层土壤持水量和有机碳关系,以若尔盖地区主要覆被类型(沼泽化草甸、非沼泽化草甸和天然林地)浅层(0~20 cm)土壤为研究对象,分析其有机碳和水分特征,探究土壤有机碳含量和最大持水量关系。结果表明:3种覆被类型浅层土壤总孔隙度、最大持水量和有机碳含量均存在明显差异,其中,沼泽化草甸土壤最大持水量最高(2 592.46 g·kg-1),是非沼泽化草甸和天然林地的4.0和1.9倍;沼泽化草甸土壤有机碳含量(416.11 g·kg-1)约为非沼泽化草甸和天然林地的4.2和2.7倍;若尔盖地区浅层土壤最大持水量与有机碳含量呈极显著正相关关系(R2=0.92,P<0.01),每一种覆被类型土壤水碳也均呈极显著正相关关系;3种覆被类型浅层土壤水碳拟合曲线斜率范围为4.11~7.43,天然林地最大,依次为非沼泽化草甸和沼泽化草甸。研究揭示该地区天然林地土壤最大持水量对有机碳含量变化最敏感,沼泽化草甸土壤水碳关系相对稳定。研究结果对科学判断全球变化背景下区域碳水功能评估提供数据基础。

关键词: 若尔盖地区, 土壤持水量, 土壤有机碳, 拟合曲线斜率

Abstract: In order to explore that relationship between water holding capacity and organic carbon of shallow soil in the Zoige region,in this study,the shallow soils (0~20 cm) of main plant cover types (swamp meadow,non-swamped meadow and natural forest) in the Zoige Region were collected and analyzed the characteristics of organic carbon and water moisture to explore the relationships between soil organic carbon content and maximum water holding capacity.The results showed that:there were obvious differences in total porosity,maximum water holding capacity and organic carbon content of shallow soil among the three cover types.Among them,the maximum water holding capacity of swamped meadow soil was the highest (2592.46 g·kg-1),which was 4.0 and 1.9 times that of non-swamped meadow and natural forest.The content of soil organic carbon in swamped meadow (416.11 g·kg-1) was about 4.2 and 2.7 times that of in non-swamped meadow and natural forest.There was a very significant positive correlation between the maximum water holding capacity of shallow soil and organic carbon content in the Zoige region (R2=0.92,P<0.01),while there was also a very significant positive correlation between soil water and carbon of each plant cover type.The slope of fitting curve of water and carbon in shallow soil of three types of cover ranges from 4.11 to 7.43,and the natural forest land is the largest,followed by non-swamped meadow and swamped meadow.The study revealed that the maximum water holding capacity of natural forest soil in this area is the most sensitive to change of organic carbon content,and the relationship between water and carbon in swamped meadow soil is relatively stable.The results provide data basis for scientific judgment of regional carbohydrate functional evaluation under the background of global change.

Key words: Zoige Region, Soil water holding capacity, Soil organic carbon, Slope of curve fitting

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