Contents of Soil Nutrients and Characteristics of Enzyme Activities in Different Vegetation Types of the Yuanyang Terraces

• Published in: Guangdong nong ye ke xue Vol. 49; no. 3; pp. 86 - 95
• Main Authors: Liutong WU, Zhihao ZHANG, Guoling XIE, Xueyan DI, Hao SHI, Youbo SU
• Format: Journal Article
• Language: English
• Published: Guangdong Academy of Agricultural Sciences 01-03-2022
• Subjects: correlation analysis; soil enzyme activity; soil nutrient; vegetation type; yuanyang terrace
• ISSN: 1004-874X
• DOI: 10.16768/j.issn.1004-874X.2022.03.010

【Objective】The soil nutrient contents and soil enzyme activities of different vegetation types of the Yuanyang terraces were investigated.【Method】Six vegetation types (cudweed, green bamboo, Melastoma candidum, China fir, Anlnus nepalensis, and camphor wood) were selected in the core area of the Yuanyang terraces and sampled at 0-20 cm and 20-40 cm soil layer. The physicochemical properties (pH, organic carbon, total nitrogen, alkaline nitrogen, total phosphorus, available phosphorus, total potassium and available potassium) and soil enzyme activities (sucrase, urease, protease and catalase) were determined for each soil layer, and correlations between soil nutrients and soil enzyme activities were analyzed.【Result】Soil nutrients and soil enzyme activities of different vegetation types showed a decreasing trend with the increase of soil depth, and the phenomenon of soil nutrient surface-aggregation was obvious. There were highly significant correlations between soil enzyme activities and significant and highly significant correlations between soil nutrients. There were highly significant correlations between soil alkaline nitrogen, protease, catalase and sucrase, and significant correlations with urease. In the 0-40cm soil of each vegetation type, soil sucrase and urease were both highest in China fir soil (58.42 mg/g·24h and 58.21 mg/g·24h respectively), protease was highest in Anlnus nepalensis soil (247.79 mg/g·h) and catalase was highest in green bamboo soil (3.76 mg/g·24h). Organic carbon content was highest in Melastoma candidum soil (24.35 g/kg), total and alkaline nitrogen contents were highest in Melastoma candidum and cudweed soils (2.24 g/kg and 112.46 mg/kg, respectively), and total and available phosphorus contents were highest in Anlnus nepalensis and cudweed soils (0.82 g/kg and 75.10 mg/kg, respectively).【Conclusion】Different vegetation types influence soil nutrient content and soil enzyme activity, which show vertical distribution characteristics.