[1]LI Yi,YANG Zisong.Soil Nutrients and Soil Microbial Characteristics and Their Relationships Under Different Land Use Types in Minjiang River Basin[J].Research of Soil and Water Conservation,2020,27(01):33-38,46.
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Soil Nutrients and Soil Microbial Characteristics and Their Relationships Under Different Land Use Types in Minjiang River Basin
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 01
Page number:
33-38,46
Column:
Public date:
2020-02-20
- Title:
- Soil Nutrients and Soil Microbial Characteristics and Their Relationships Under Different Land Use Types in Minjiang River Basin
- CLC:
- Q154
- DOI:
- -
- Abstract:
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The variation characteristics of soil microbial community diversity in different land use patterns(abandoned lands, secondary forests, shrubs, orchards and cultivated lands)in minjiang river basin from 2014 to 2018 were studied by using classical statistical analysis and sequencing analysis, and the relationship between them and soil nutrients and soil microbial quantity was discussed. The results showed that:(1)the pH value of the soil ranged from 6.13 to 7.02, and the pH values of the abandoned lands increased in the order: secondary forest
0.05), and soil pH of the cultivated land was the highest (p<0.05); the levels of soil organic carbon, total nitrogen, total potassium, available phosphorus and available potassium decreased in the order: secondary forests>shrubs>orchards>cultivated land>abandoned lands; the differences of available phosphorus and available potassium in different land uses were significant (p<0.05), while the differences of total phosphorus in different land uses were not significant (p>0.05);(2)the number of soil microorganisms was the largest, accounting for more than 90%; the total number of soil bacteria, fungi, actinomycetes and microorganisms decreased in the order: secondary forests>shrubs>orchards>cultivated land>abandoned lands;(3)species richness index(H), evenness index(E), dominance index(Ds)and carbon source utilization richness index(S)of soil microbial community were calculated according to AWCD value at 100 h; the soil microbial diversity index decreased in the order: secondary forests>shrubs>orchards>cultivated land>abandoned lands, no significant difference in the evenness index(E)and dominance index(Ds)was found (p>0.05);(4)correlation analysis showed that soil nutrients and soil microbial quantity were significantly correlated with soil microbial community diversity (p<0.05), among which soil microbial quantity contributed the most to microbial community diversity(with the largest absolute value of correlation coefficient);(5)redundancy analysis showed that soil microbial community diversity was positively correlated with soil nutrient contents; along the first sequencing axis of RDA, with the increase of significant influencing factors(soil nutrient indexes), the microbial richness index gradually increased, and the microbial richness index was negatively correlated with pH value; organic carbon and total nitrogen had the largest correlation with richness index, therefore, organic carbon and total nitrogen were the main factors affecting the diversity distribution of soil microbial community in this area.
- References:
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Last Update:
2020-02-25