[1]YANG Han,ZHOU Wei,SHI Peiqi,et al.Analysis of Temporal-Spatial Variations of NPP and Coupling Relationship with Hydrothermal Factors in Grasslands of Inner Mongolia[J].Research of Soil and Water Conservation,2019,26(02):234-240.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 02
Page number:
234-240
Column:
Public date:
2019-04-28
- Title:
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Analysis of Temporal-Spatial Variations of NPP and Coupling Relationship with Hydrothermal Factors in Grasslands of Inner Mongolia
- Author(s):
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YANG Han, ZHOU Wei, SHI Peiqi, HUANG Lu
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Department of Geography and Land Resources, College of Architecture and Urban Planning, Chongqing Jiaotong University, Chongqing 400074, China
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- Keywords:
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CASA model; the NPP of grassland; hydrothermal factors; Inner Mongolia
- CLC:
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Q948
- DOI:
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- Abstract:
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Based on satellite remote sensing data, ground meteorological observation data and other statistical data, the CASA model was used to estimate NPP of grassland in Inner Mongolia, and to analyze the temporal-spatial variation of NPP and its coupling with hydrothermal factors. The results showed that the average annual NPP of grassland in Inner Mongolia was 343.46 g C/(m2·a) from 2001 to 2016, and the distribution of NPP was characterized as increase from northeast to southwest; the average annual NPP value was about 0.218 Pg C and the total value was 3.483 Pg C in 16 years. In most districts, grassland NPP fluctuated upward with an average annual growth rate of 4.27 g C/(m2·a). The partial correlation coefficient between the NPP of grassland and annual mean temperature in Inner Mongolia was 0.306, the partial correlation coefficient between the NPP of grassland and annual total precipitation was 0.622; the NPP of grassland had the significant positive correlation with annual total precipitation in most areas, but not significantly related with the annual mean temperature.