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[1]MA Li-hong,HUANG Xue-ju,QIN Ji-hong,et al.Impacts of Litter and Snow Cover on Topsoil Urease Activity Dynamics of Subalpine Forest in Southwestern China in the Cold Season[J].Research of Soil and Water Conservation,2013,20(02):60-65.

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Impacts of Litter and Snow Cover on Topsoil Urease Activity Dynamics of Subalpine Forest in Southwestern China in the Cold Season

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 02 Page number: 60-65 Column: Public date: 2013-04-28

Title:: Impacts of Litter and Snow Cover on Topsoil Urease Activity Dynamics of Subalpine Forest in Southwestern China in the Cold Season

Author(s):: MA Li-hong¹, HUANG Xue-ju², QIN Ji-hong³, SUN Hui¹, LI Sha¹; 1. Department of Environmental Science and Engineering, Sichuan University, Chengdu 610065, China;
2. Sichuan Research Academy of Environmental Science, Chengdu 610041, China;
3. College of Rural and Urban Construction, Chengdu University, Chengdu, 610106

Keywords:: subalpine forest; cold season; soil urease activity; cover; cold ecosystem

CLC:: S714.3;S154.2

DOI:: -

Abstract:: Urease activity is often used as one of biochemical indices to assess soil organic nitrogen transformation and mineralization because of its vulnerability and sensitivity to soil temperature, surface cover, moisture dynamics. In order to determine impacts of litter and snow cover on topsoil urease activity dynamics of subalpine forest in southwestern China in the cold season, based on homogenized soil columns incubated in situ under four treatments (i.e., bare soil without snowcover, bare soil with snowcover, litter without snowcover, and litter with snowcover), soil of 0—10 cm and 10—20 cm layers of the four treatments were sampled in October, December, January, February, March and May, respectively, and their urease activities were analyzed. The results showed that: (1) urease activities were relatively higher in subalpine forest soil during the cold season from November to May, and it increased gradually in the initial period, then reduced sharply, and reached to the summit by the end of the cold season; (2) soil urease activities were impacted significantly by litter and snow cover in 0—10 cm and 10—20 cm layers during the cold season, and interaction of snow cover and litter cover on URE activity were significant. Soil urease activity could be used as one of soil biochemical indicators of short-term response to environment changes in subalpine cold ecosystems.

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