[1]YANG Ruihong,WANG Xinjun.The Vertical Distribution of Vegetation Patterns and Soil Properties at the Northern Slope of Ili River Valley[J].Research of Soil and Water Conservation,2016,23(06):32-39,44.
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The Vertical Distribution of Vegetation Patterns and Soil Properties at the Northern Slope of Ili River Valley
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 06
Page number:
32-39,44
Column:
Public date:
2016-12-28
- Title:
- The Vertical Distribution of Vegetation Patterns and Soil Properties at the Northern Slope of Ili River Valley
- CLC:
- S153.6;Q948
- DOI:
- -
- Abstract:
- Based on a survey of sample plots in the study area, DCA, Pearson and principal component were used to analyze the relationships between diversity indices and soil properties, which were located on the north slopes of the Iri Valley, Xinjiang, China. The results are as follows. (1) The vegetation types were divided into coniferous forest, mountain meadow, broadleaved deciduous forest and desert steppe according to the vegetation habitats and soils along the elevation. The species richness and Simpson index first increased and then decreased, then increased with the increasing elevation, which had the significant difference in different elevations (p < 0.05), and Shannon-Wiener index increased and then decreased with the increasing elevation and Pielou evenness index decreased and then increased then decreased. (2) Soil organic matter and available nitrogen content increased with the increase of elevation with the sequence of coniferous forest > mountain meadow > broadleaved deciduous forest > desert steppe, which had a significant difference in different elevations (p < 0.05), while the content of available phosphorus had no significant difference in different elevations (p > 0.05), and the content of available potassium first increased and then decreased with the increase of elevation. (3) The soil pH gradually decreased with the increase of elevation with the sequence of desert steppe > mountain meadow > broadleaved deciduous forest > coniferous forest, and the soil conductivity, contents of salt and total salt first increased and then decreased with the sequence of mountain meadow > broadleaved deciduous forest > desert steppe > coniferous forest. (4) The principal component analysis showed that the first principal components were total salt, electric conductivity, soil total salt, which might be referred to as the soil salinity factor, and the second principal components were soil effective nitrogen, organic matter and pH value, respectively, which might be referred to as soil fertilizer factors. (4) DCA sorting results indicated that with the gradual decrease of elevation, the soil organic matter, available nitrogen and available potassium decreased gradually, while pH and conductivity increased in the first axis of DCA, and the soil total salt increased gradually, and the soil available phosphorus gradually reduced in the second axis of DCA. (5) To sum up, these patterns were formed by the synthetic action of a variety of environmental factors among which elevation played an important role, and the vertical distribution of vegetation patterns and soil properties were not same indicating that there was the potential lag.
- References:
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1900-01-01