Acta Agrestia Sinica ›› 2024, Vol. 32 ›› Issue (3): 827-837.DOI: 10.11733/j.issn.1007-0435.2024.03.019

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Changes in Soil Carbon,Nitrogen,Phosphorus Content and Stoichiometric Characteristics of Artificial Grassland Soils

A DI-ha-ze1,4, CHANG Tao1,4, QIN Rui-min1,4, WEIJing-jing1,2, SU Hong-ye1,4, HU Xue1,4, MA Li1, ZHANG Zhong-hua1, SHI Zheng-chen1,4, LI Shan1, YUAN Fang1, LI Hong-lin1,3, ZHOU Hua-kun1   

  1. 1. Qinghai Provincial Key Laboratory of Cold Regions Restoration Ecology, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai Province 810008, China;
    2. College of Geography Science, Qinghai Normal University, Xining, Qinghai Province 810016, China;
    3. College of Eco-Environmental Engineering, Qinghai University, Xining, Qinghai Province 810016, China;
    4. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2023-08-27 Revised:2023-12-18 Online:2024-03-15 Published:2024-04-03

人工草地土壤碳氮磷含量变化及化学计量特征研究

阿的哈则1,4, 常涛1,4, 秦瑞敏1,4, 魏晶晶1,2, 苏洪烨1,4, 胡雪1,4, 马丽1, 张中华1, 史正晨1,4, 李珊1, 袁访1, 李宏林1,3, 周华坤1   

  1. 1. 中国科学院西北高原生物研究所, 青海省恢复生态学重点实验室, 青海 西宁 810008;
    2. 青海师范大学, 青海 西宁 810016;
    3. 青海大学, 青海 西宁 810016;
    4. 中国科学院大学, 北京 100049
  • 通讯作者: 周华坤,E-mail:hkzhou@nwipb.cas.cn
  • 作者简介:阿的哈则(1997-),男,彝族,四川冕宁人,硕士研究生,主要从事恢复生态学研究,E-mail:2548414897@qq.com
  • 基金资助:
    国家自然科学基金联合基金项目(U21A20186);青海省自然科学基金创新团队项目(2021-ZJ-902);第二次青藏高原综合科学考察研究项目(2019QZKK0302-02)资助

Abstract: Artificial grassland establishment is an effective method for managing grassland degradation in the Sanjiangyuan area. This study analyzed the availability of soil nutrients and the mechanism of carbon,nitrogen,and phosphorus cycling and balancing by examining the content of key nutrient elements and their proportional relationships in soils sown with different pasture grasses in the Sanjiangyuan area. The finds suggest that the contents of soil organic carbon,total nitrogen,and total phosphorus in the artificial grassland were significantly higher than those in the degraded grassland. Additionally,the soil nutrient improvement effect of mixed-seeded artificial grassland was better than that of single-seeded artificial grassland. Further correlation analyses revealed that soil C:N was limited by carbon and nitrogen,soil C:P was limited by carbon,and soil N:P was limited by carbon and nitrogen. In summary,the main limiting nutrient elements in the region are carbon and nitrogen. Therefore,supplementing these nutrients appropriately can improve the soil quality of artificial grassland. This study's results provide an valuable reference forsoil quality improvement in the Sanjiangyuan area through rational pasture mixing.

Key words: Sanjiangyuan, Artificial grassland, Carbon,nitrogen and phosphorus, Stoichiometry characteristics

摘要: 人工草地建植是治理三江源地区草地退化最有效的方法之一。本研究以三江源地区不同牧草播种的土壤为研究对象,通过分析土壤中关键养分元素的含量及其比例关系,揭示了土壤养分的可获得性碳、氮、磷元素循环和平衡机制。研究结果显示,人工草地土壤有机碳、全氮和全磷含量明显高于退化草地;混播人工草地对土壤养分改善效果优于单播人工草地;进一步的相关性分析表明,土壤C:N比值受到碳素和氮素限制,土壤C:P比值受到碳素限制,土壤N:P比值受到碳素和氮素的限制。综上所述,碳和氮是该地区主要限制养分元素,因此可以适当添加碳氮养分来改善人工草地的土壤质量。研究结果对于三江源地区通过合理牧草混播方式改善土壤质量提供了重要参考依据。

关键词: 三江源, 人工草地, 碳氮磷, 化学计量特征

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