干旱区不同沼泽湿地类型土壤有机碳分布特征及其影响因素

doi:10.14088/j.cnki.issn0439-8114.2020.18.011

摘要/Abstract

摘要： 以干旱区湿地为研究对象,对草本沼泽、季节性咸水沼泽和内陆盐沼3种类型湿地的土壤有机碳分布特征及其影响因素进行了研究。结果表明,草本沼泽、季节性咸水沼泽以及内陆盐沼0~100 cm土层的土壤有机碳含量分别为1.19~49.03、1.62~101.14、2.61~23.77 g/kg,其中,季节性咸水沼泽有机碳含量显著高于草本沼泽;草本沼泽土壤有机碳含量与土壤水分、全氮、N/P呈显著正相关,季节性咸水沼泽湿地土壤有机碳含量与土壤水分、容重、全氮和N/P均呈显著正相关,与pH呈极显著负相关,内陆盐沼土壤有机碳含量与全氮呈极显著正相关。结合主成分分析,3种湿地类型主成分F₁贡献率最高,且与土壤水分高度相关。证明土壤水分是影响土壤有机碳积累的关键主导因素。

关键词: 干旱区湿地, 土壤有机碳, 分布特征, 土壤水分, 沼泽湿地

Abstract: Taking wetlands in arid areas as the research object, the distribution characteristics and influencing factors of soil organic carbon in three types of wetlands： Herb marshes, seasonal salt-water marshes and inland salt marshes were studied. The results showed that the soil organic carbon content of the 0~100 cm soil layer of herbaceous marsh, seasonal saltwater marsh and inland salt marsh were 1.19~49.03, 1.62~101.14, 2.61~23.77 g/kg, respectively. The organic carbon content of seasonal saltwater marshes was significantly higher than that of herbaceous marshes; The soil organic carbon content of herbaceous marshes was significantly positively correlated with soil moisture, total nitrogen, and N/P. Seasonal saltwater the soil organic carbon of marsh wetlands was significantly correlated with soil moisture, bulk density, total nitrogen and N/P, and pH showed a very significant negative correlation. Inland salt marsh soil organic carbon was significantly correlated with total nitrogen was extremely significant positive correlation. Combined with the principal component analysis, three types of wetland F₁ contribution rate was highly correlated with soil moisture. It was proved that soil moisture was the key leading factor affecting the accumulation of soil organic carbon.

Key words: arid wetland, soil organic carbon, distribution characteristics, soil moisture, marsh wetland

中图分类号:

S153.6

陈涛. 干旱区不同沼泽湿地类型土壤有机碳分布特征及其影响因素[J]. 湖北农业科学, 2020, 59(18): 54-62.

CHEN Tao. Distribution characteristics of soil organic carbon and its influencing factors in different swamp wetland types in arid region[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(18): 54-62.

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