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FOREST RESOURCES WANAGEMENT ›› 2023, Vol. 0 ›› Issue (4): 71-79.doi: 10.13466/j.cnki.lyzygl.2023.04.009

• Scientific Research • Previous Articles     Next Articles

Characteristics and Influence Factors of Aoil Urease in a Typical Monsoon Evergreen Broad-Leaved Forest in Southern Yunnan

YANG Zhi1(), LI Xiaoying2(), YUAN Yong1, YU Hu1, LI Jinxi1   

  1. 1. Faculty of Modern Agricultural Engineering,Kunming University of Science and Technology,Kunming 650500,China
    2. School of Ecology and Environment,Southwest Forestry University,Kunming 650224,China
  • Received:2023-05-30 Revised:2023-07-06 Online:2023-08-28 Published:2023-10-16

Abstract:

The characteristics ofsoil urease and its relationship with soil physical and chemical properties in typical monsoon evergreen broad-leaved forest in southern Yunnan were systematically analyzed by field investigation and indoor analysis.The results showed that:1)The urease activity in 0~<10 cm soil layer[2.23 mg/(g·24 h)]was higher than that in 10~20 cm soil layer[1.69 mg/(g·24 h)],but there was no significant difference between the two soil layers.2)Soil urease activity in typical monsoon evergreen broad-leaved forest in southern Yunnan was significantly positively correlated with soil natural water content,total porosity,saturated water holding capacity,organic carbon content,hydrolyzed nitrogen content,total nitrogen content and total phosphorus content (P<0.01),and significantly negatively correlated with soil bulk density,pH value and total potassium content(P<0.01).3)The key influencing factors of soil urease activity were soil moisture,structural factors(soil water content,saturated water holding capacity,bulk density and total porosity)and soil carbon and nitrogen factors(soil organic carbon,hydrolyzed nitrogen and total nitrogen),followed by carbon nitrogen ratio(C/N).More attention should be paid to soil moisture,structure management and soil carbon and nitrogen regulationin the forest management in southern Yunnan.This study can lay the foundation for further study of soil material cycle process and provide reference for the formulation of forest resources management measures.

Key words: soil enzyme, material cycle, soil water, soil nutrient, carbon nitrogen ratio

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