Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (9): 1-14.DOI: 10.11686/cyxb2020398
Xin YANG1(), Wen-xia CAO1, Xiao-jun YU1, Hai-bin WANG2, Yuan-yuan HAO1()
Received:
2020-08-24
Revised:
2020-12-14
Online:
2021-08-30
Published:
2021-08-30
Contact:
Yuan-yuan HAO
Xin YANG, Wen-xia CAO, Xiao-jun YU, Hai-bin WANG, Yuan-yuan HAO. Dynamic monitoring of grassland resources and their responses to environmental factors in Qinghai Province based on analyses of daily MODIS NDVI data from the past 20 years[J]. Acta Prataculturae Sinica, 2021, 30(9): 1-14.
类别Class | 类型Type | NDVI值NDVI value |
---|---|---|
Ⅰ | 冰雪覆盖 Cryoconite cover | -1.0~0 |
Ⅱ | 无植被区No vegetation area | 0~0.1 |
Ⅲ | 退化草地Depleted grassland | 0.1~0.4 |
Ⅳ | 普通草地Ordinary grassland | 0.4~0.7 |
Ⅴ | 优质草地High quality grassland | 0.7~1.0 |
Table 1 Growth status of grassland vegetation in Qinghai Province
类别Class | 类型Type | NDVI值NDVI value |
---|---|---|
Ⅰ | 冰雪覆盖 Cryoconite cover | -1.0~0 |
Ⅱ | 无植被区No vegetation area | 0~0.1 |
Ⅲ | 退化草地Depleted grassland | 0.1~0.4 |
Ⅳ | 普通草地Ordinary grassland | 0.4~0.7 |
Ⅴ | 优质草地High quality grassland | 0.7~1.0 |
区名 District name | 退化 Deterioration | 轻度退化 Mild deterioration | 稳定 Stablilzation | 轻度改善 Mild improvement | 改善 Improvement |
---|---|---|---|---|---|
青海省Qinghai Province | 15.79 | 28.54 | 12.97 | 29.94 | 12.75 |
环湖及祁连山区Around the lake and Qilian Mountains | 9.91 | 29.19 | 13.31 | 34.49 | 13.10 |
柴达木盆地Qaidam Basin | 27.84 | 24.17 | 5.92 | 22.68 | 19.39 |
青南高原Southern Qinghai Plateau | 11.09 | 30.88 | 15.66 | 32.80 | 9.57 |
东部农业区The eastern agricultural region | 3.28 | 29.93 | 27.88 | 35.02 | 3.89 |
Table 2 Grassland change trends in various regions of Qinghai Province from 2000 to 2019 (%)
区名 District name | 退化 Deterioration | 轻度退化 Mild deterioration | 稳定 Stablilzation | 轻度改善 Mild improvement | 改善 Improvement |
---|---|---|---|---|---|
青海省Qinghai Province | 15.79 | 28.54 | 12.97 | 29.94 | 12.75 |
环湖及祁连山区Around the lake and Qilian Mountains | 9.91 | 29.19 | 13.31 | 34.49 | 13.10 |
柴达木盆地Qaidam Basin | 27.84 | 24.17 | 5.92 | 22.68 | 19.39 |
青南高原Southern Qinghai Plateau | 11.09 | 30.88 | 15.66 | 32.80 | 9.57 |
东部农业区The eastern agricultural region | 3.28 | 29.93 | 27.88 | 35.02 | 3.89 |
Fig.11 Correlation and partial correlation coefficients between grassland vegetation NDVI and precipitation or temperature in Qinghai Province from 2000 to 2015
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