IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Nie Xiaojun1; Zhang Jianhui2; Gao Han1
Source Publicationpedosphere
AbstractDetermining how soil erosion affects enzyme activity may enhance our understanding of soil degradation on eroded agricultural landscapes. This study assessed the changes in enzyme activity with slope position and erosion type by selecting water and tillage erosion-dominated slopes and performing analyses using the ~(137)Cs technique. The ~(137)Cs data revealed that soil loss occurred in the upper section of the two eroded slope types, while soil accumulation occurred in the lower section. The invertase activity increased downslope and exhibited a pattern similar to the ~(137)Cs data. The spatial patterns of urease and alkaline phosphatase activities were similar to the ~(137)Cs inventories on the water and tillage erosion-dominated slopes, respectively. On both the eroded slope types, the invertase activity and soil organic carbon content were correlated, but no correlation was observed between the alkaline phosphatase activity and total phosphorus content. Nevertheless, the urease activity was correlated with the total nitrogen content only on the water erosion-dominated slopes. The enzyme activity-to-microbial biomass carbon ratios indicated high activities of invertase and urease but low activity of phosphatase on the water erosion-dominated slopes compared with the tillage erosion-dominated slopes. Both the invertase activity and the invertase activity-to-microbial biomass carbon ratio varied with the slope position. Changes in the urease activity-to-microbial biomass carbon ratio were significantly affected by the erosion type. These suggested that the dynamics of the invertase activity were linked to soil redistribution on the two eroded slope types, whereas the dynamics of the urease and alkaline phosphatase activities were associated with soil redistribution only on the water or tillage erosion-dominated slopes, respectively. The erosion type had an obvious effect on the activities of invertase, urease and alkaline phosphatase. Soil redistribution might influence the involvement of urease in the N cycle and alkaline phosphatase in the P cycle. Thus, enzyme activity-to-microbial biomass ratios may be used to better evaluate microbiological activity in eroded soils.
Document Type期刊论文
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Nie Xiaojun,Zhang Jianhui,Gao Han. soilenzymeactivitiesonerodedslopesinthesichuanbasinchina[J]. pedosphere,2015,25(4):489.
APA Nie Xiaojun,Zhang Jianhui,&Gao Han.(2015).soilenzymeactivitiesonerodedslopesinthesichuanbasinchina.pedosphere,25(4),489.
MLA Nie Xiaojun,et al."soilenzymeactivitiesonerodedslopesinthesichuanbasinchina".pedosphere 25.4(2015):489.
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