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中国沙漠 ›› 2023, Vol. 43 ›› Issue (1): 150-159.DOI: 10.7522/j.issn.1000-694X.2022.00116

• • 上一篇    

荒漠河岸林区3种典型植物群落下土壤碳氮含量特征

陈雨晴1,2(), 席海洋1(), 程文举1,2, 赵欣悦1,2   

  1. 1.中国科学院西北生态环境资源研究院,甘肃 兰州 730000
    2.中国科学院大学,北京 100049
  • 收稿日期:2022-08-04 修回日期:2022-09-21 出版日期:2023-01-20 发布日期:2023-01-17
  • 通讯作者: 席海洋
  • 作者简介:席海洋(E-mail: xihy@lzb.ac.cn
    陈雨晴(1997—),女,山东淄博人,硕士研究生,主要从事干旱区水土资源研究。E-mail: chenyuqing@nieer.ac.cn
  • 基金资助:
    中国科学院“西部交叉团队”重点实验室专项(xbzg-zdsys-202103);内蒙古自治区科技重大专项(zdzx2018057)

Characteristics of soil carbon and nitrogen change in three typical plant communities in desert riparian forest area

Yuqing Chen1,2(), Haiyang Xi1(), Wenju Cheng1,2, Xinyue Zhao1,2   

  1. 1.Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2022-08-04 Revised:2022-09-21 Online:2023-01-20 Published:2023-01-17
  • Contact: Haiyang Xi

摘要:

以黑河下游荒漠河岸林区3种典型植物(苦豆子(Sophora alopecuroides)、胡杨(Populus euphratica)、柽柳(Tamarix ramosissima))群落下的土壤为研究对象,分析了0~280 cm土层土壤碳氮含量特征,运用Pearson相关分析、通径分析方法揭示了土壤碳氮含量与其他理化性质的关系。结果表明:(1)苦豆子、胡杨、柽柳群落下的土壤平均碳含量分别为16.35、20.23、17.23 mg·g-1,平均氮含量分别为0.47、0.69、0.61 mg·g-1,植被类型导致的土壤碳氮含量的差异主要表现在0~10 cm表层。(2)荒漠河岸林区0~160 cm土壤碳储量柽柳(444.64 t·hm-2)>胡杨(398.60 t·hm-2)>苦豆子(368.95 t·hm-2),土壤氮储量柽柳(12.46 t·hm-2)>胡杨(11.88 t·hm-2)>苦豆子(10.60 t·hm-2)。(3)土壤有机质、总磷、速效磷、碱解氮、速效钾含量及电导率与土壤碳氮含量正相关(P<0.01),pH、容重与土壤碳氮含量负相关(P<0.01)。

关键词: 总碳, 总氮, 荒漠河岸带, 土壤理化性质, 通径分析

Abstract:

Taking the soils under the 3 vegetation types of desert riparian forest in the lower reaches of the Heihe River as the research object, the variation characteristics of soil carbon and nitrogen from 0-280 cm were analyzed by means of field sampling and laboratory analysis. Pearson correlation analysis and path analysis methods were used to reveal the relationship between soil carbon, nitrogen and physicochemical properties. The results showed that: (1) The average soil carbon content under the planting covers of Sophora alopecuroidesPopulus euphraticaTamarix ramosissima was 16.35, 20.23, 17.23 mg·g-1, respectively, and the average nitrogen content was 0.47, 0.69, 0.61 mg·g-1, respectively. The difference in soil carbon and nitrogen content due to vegetation type was mainly manifested in the surface layer of 0-10 cm. (2) Soil carbon storage in the desert riparian forest area of 0-160 cm was shown as Tamarix ramosissima (444.64 t·hm-2)>Populus euphratica (398.60 t·hm-2)>Sophora alopecuroides (368.95 t·hm-2), and soil nitrogen storage was Tamarix ramosissima (12.46 t·hm-2)>Populus euphratica (11.88 t·hm-2)>Sophora alopecuroides (10.60 t·hm-2). (3) The correlation analysis between soil carbon and nitrogen content and physical and chemical properties showed that organic matter, total phosphorus, available phosphorus, alkaline nitrogen, available potassium, conductivity and carbon and nitrogen content were positively correlated (P<0.01), and pH, bulk weight and carbon and nitrogen content were negatively correlated (P<0.01). The results of this study can provide a reference for the study of the spatial pattern of carbon and nitrogen in the desert riparian zone in arid areas.

Key words: total carbon, total nitrogen, desert riparian forests, soil physicochemical properties, path analysis

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