[1]ZHANG Peng,WANG Guoliang.Changes of Soil Enzyme in Robinia pseudoacacia Forest Along Environmental Gradient on the Loess Plateau[J].Research of Soil and Water Conservation,2020,27(01):161-167.
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Changes of Soil Enzyme in Robinia pseudoacacia Forest Along Environmental Gradient on the Loess Plateau
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 01
Page number:
161-167
Column:
Public date:
2020-02-20
- Title:
- Changes of Soil Enzyme in Robinia pseudoacacia Forest Along Environmental Gradient on the Loess Plateau
- CLC:
- S718.5
- DOI:
- -
- Abstract:
- Soil enzymes play an important role in the material cycling, information exchange and energy flow of underground ecosystems, and are one of the hotspots of current ecology research. However, the mechanism of soil enzymes change along environmental gradient is still unclear. Therefore, Robinia pseudoacacia Forests in four areas(Chunhua, Ansai, Suide and Shenmu)from the north to the south of the Loess Plateau were selected as the research samples. Soil nutrients, microbial biomass and enzyme activities were measured, and the relationship between enzyme activity and its stoichiometry, climate, soil nutrients and microbial biomass were analyzed. The results showed that:(1)from north to south, the activities of beta-1,4-glucosidase(BG), beta-N-acetylglucosaminidase(NAG), leucine aminopeptidase(LAP)and alkaline phosphatase(AP)were 28.72～110.66, 1.60～3.32, 6.84～10.25 and 14.17～32.60 nmol/(g·h), respectively; LAP showed an increasing trend; BG, NAG and AP increased at first, then decreased and then increased;(2)microbial biomass carbon(MBC), microbial biomass nitrogen(MBN)and microbial biomass phosphorus(MBP)ranged between 23.08～95.04 mg/kg, 2.86～7.95 mg/kg and 0.53～0.92 mg/kg, respectively;(3)BG/(LAP+NAG), BG/AP,(LAP+NAG)/AP were between 3.15～6.46, 1.5～2.96 and 0.41～0.70, respectively; BG/(LAP+NAG)decreased at first, then increased, which was the highest in Chunhua; BG/AP decreased at first, then increased, which was the highest in Shenmu; and(LAP+NAG)/AP showed a continuous decreasing trend;(4)through redundancy analysis, the total explanatory rate of environmental factors to soil enzymes and microbial biomass reached up to 57.36%; among them, the annual average rainfall and N/P had the greatest influence and positive correlation, explaining rates were 36.60% and 14.80%, respectively; the total explanatory rate of environmental factors to soil enzymes and microbial quantification was 72.18%, soil available phosphorus had the greatest impact on soil total nitrogen, and had a positive correlation, the interpretation rates were 30.5% and 19.1%, respectively; microbial community is relatively stable, and there is no significant relationship between microbial quantification and soil nutrient differentiation, soil enzymatic stoichiometric ratio is not stable along the environmental gradient and depends on the stoichiometric ratio of available nutrients and soil nutrient differentiation.
- References:
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Last Update:
2020-02-25