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Forests 2016, 7(6), 112; doi:10.3390/f7060112

Soil Enzyme Activities in Pinus tabuliformis (Carriére) Plantations in Northern China

1
Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China
2
USA Department of Agriculture, Forest Service, Rocky Mountain Research Station, 1221 South Main Street, Moscow, ID 83843, USA
3
College of Plant Science and Technology, Tarim University, Alar Xinjiang 843300, China
*
Author to whom correspondence should be addressed.
Academic Editors: Philip J. Polglase and Timothy A. Martin
Received: 3 March 2016 / Revised: 23 May 2016 / Accepted: 23 May 2016 / Published: 26 May 2016
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Abstract

Changes in forest stand structure may alter the activity of invertase, urease, catalase and phenol oxidase after thinning Pinus tabuliformis (Carriére) plantations in Yanqing County of Beijing, China. We examined changes in these soil enzymes as influenced by time since thinning (24, 32, and 40 years since thinning) for 3 seasons (spring, summer and autumn) following harvesting at two depths in the mineral soil (0–10 cm and 10–20 cm). Invertase and urease increased significantly with time since thinning. Catalase activity was highest in the 24-year-old stand and there were no statistically significant differences between the 32- and 40-year-old stands. In addition, maximum invertase, urease, catalase, and phenol oxidase activities occurred during the summer; minimum activities occurred in autumn. Invertase and urease were positively correlated with each other, as were catalase and phenol oxidase. Most soil enzyme activity was higher in the 0–10 cm layer than at the 10–20 cm depth. As time from thinning increased, differences among soil depth became less significant. These results suggest that seasonal changes of these enzymes have different roles, as the time since thinning and thinning treatments may have both short- and long-term impacts on soil microbial activity. View Full-Text
Keywords: invertase; urease; catalase; phenol oxidase; forest thinning invertase; urease; catalase; phenol oxidase; forest thinning
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MDPI and ACS Style

Wang, W.; Page-Dumroese, D.; Lv, R.; Xiao, C.; Li, G.; Liu, Y. Soil Enzyme Activities in Pinus tabuliformis (Carriére) Plantations in Northern China. Forests 2016, 7, 112.

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