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[1]PEI Bing,ZHU Longfei,FENG Zhipei,et al.Seasonal Dynamics of Soil Enzyme Activities Under Five Different Ages of Platycladus orientalis Artificial Forest in the Southern Taihang Mountains[J].Research of Soil and Water Conservation,2018,25(02):170-175,182.

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Seasonal Dynamics of Soil Enzyme Activities Under Five Different Ages of Platycladus orientalis Artificial Forest in the Southern Taihang Mountains

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 02 Page number: 170-175,182 Column: Public date: 2018-04-03

Title:: Seasonal Dynamics of Soil Enzyme Activities Under Five Different Ages of Platycladus orientalis Artificial Forest in the Southern Taihang Mountains

Author(s):: PEI Bing, ZHU Longfei, FENG Zhipei, JIANG Yumeng, YANG Xitian, KONG Yuhua; College of Forestry, Henan Agricultural University, Zhengzhou 450002, China

Keywords:: Platycladus orientalis artificial forest; soil sucrase; soil urease; stand age; seasonal dynamic

CLC:: S714

DOI:: -

Abstract:: We studied seasonal dynamics and spatial transformation of soil sucrase and urease activity as well as their relations with other soil properties under 20, 30, 40, 50 and 60-year-old Platycladus orientalis plantation in mountainous region of southern Taihang Mountains by using the method of time-space mutual substitution. The results showed that both soil enzyme activities had clear seasonal dynamics, with highest value in hot summer and lowest value in cold winter. The trend of soil sucrase activity followed the order:summer > autumn > spring > winter, while the trend of soil urease activity decreased in the order:summer > spring > autumn > winter. Soil sucrase and urease activity appeared significant decrease with the depth of soil layer (p < 0.01), and the decreasing rates of both soil enzymes from the surface layer (0-10 cm) to the deep layer (30-40 cm) were more than 46%. Correlation analysis showed that both soil enzymes had positive correlation with soil water content and dissolved organic carbon concentration, and soil sucrase had a positive correlation with soil urease (p < 0.01), while the main influencing factors for both enzymes were different. Stepwise regression analysis showed that the main influencing factors on soil sucrase activity were soil water content and sand volume fraction, which could explain 71.2% of variation. The main influencing factors on urease activity were dissolved organic nitrogen, soil water content, NO₃^--N and soil bulk density, which could explain 71.5% of variation, indicating that temperature and soil moisture may be the main controlling factors on soil biological activity in this area.

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