Alkaline phosphatase activity in ornithogenic soils in polar tundra  

作　　者：MA DaWei ZHU RenBin DING Wei SUN JianJun LIU YaShu SUN LiGuang 

机构地区：[1]Institute of Polar Environment, University of Science and Technology of China, Hefei 230026, China

出　　处：《Advances in Polar Science》2011年第2期92-100,共9页极地科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant no.41076124);the KnowledgeInnovation Project of Chinese Academy of Sciences (Grant no.KZCX2-YW-QN510);the Fundamental Research Funds for the Central Universities(Grant no. WK2060190007);the Open Research Foundation of SOA Key Laboratory for Polar Sciences (Grant no.KP2008004)

摘　　要：Phosphatase plays an important role in the microbial liberation of phosphorus in soil systems. In this study, alkaline phosphatase activity （APA） was investigated from tundra ornithogenic soil profiles in Antarctica and Arctic. The organic carbon （TOC）, total nitrogen （TN）, and phosphorus fractions and pH were also analyzed in these soils. The correlation between APA and soil chemical properties is discussed. In almost all the soil profiles, APA showed the same variation patterns. The maximum APA appeared in the surface layers, and decreased with soil depth. The APA ranged from 1.00 ppm to 1 403.5 ppm with an average of approximately 408.3 ppm. The APA showed a significant positive correlation with TOC （r =0.70, p 〈0.001）, TN （r =0.43, p =0.002）, total phosphorus （r =0.39, p 〈0.05）and inorganic phosphorus （r =0.40, p =0.037）, indicating that they were predominant factors affecting APA in the polar tundra soils. In addition, APA showed a significant negative correlation with Cu and Zn concentrations in the soils, indicating that Cu and Zn may inhibit APA. Our results showed that APA could be used as an important indicator for soil fertility in polar tundra ecosystems.Phosphatase plays an important role in the microbial liberation of phosphorus in soil systems. In this study, alkaline phosphatase activity （APA） was investigated from tundra ornithogenic soil profiles in Antarctica and Arctic. The organic carbon （TOC）, total nitrogen （TN）, and phosphorus fractions and pH were also analyzed in these soils. The correlation between APA and soil chemical properties is discussed. In almost all the soil profiles, APA showed the same variation patterns. The maximum APA appeared in the surface layers, and decreased with soil depth. The APA ranged from 1.00 ppm to 1 403.5 ppm with an average of approximately 408.3 ppm. The APA showed a significant positive correlation with TOC （r =0.70, p 〈0.001）, TN （r =0.43, p =0.002）, total phosphorus （r =0.39, p 〈0.05）and inorganic phosphorus （r =0.40, p =0.037）, indicating that they were predominant factors affecting APA in the polar tundra soils. In addition, APA showed a significant negative correlation with Cu and Zn concentrations in the soils, indicating that Cu and Zn may inhibit APA. Our results showed that APA could be used as an important indicator for soil fertility in polar tundra ecosystems.

关 键 词：Tundra ornithogenic soil alkaline phosphatase organic carbon total nitrogen PHOSPHORUS 

分 类 号：S858.252.5[农业科学—临床兽医学] Q151.6[农业科学—兽医学]