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Remote Sensing
Volume 13
Issue 6
10.3390/rs13061179
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Article

Effects of Drought on Vegetation Productivity of Farmland Ecosystems in the Drylands of Northern China

by
Xiufang Zhu
1,2,3,
Ying Liu
3,*,
Kun Xu
3 and
Yaozhong Pan
3,4
1
State Key Laboratory of Remote Sensing Science, Beijing Normal University and Institute of Remote Sensing and Digital Earth of Chinese Academy of Sciences, Beijing 100875, China
2
Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education, Beijing Normal University, Beijing 100875, China
3
Faculty of Geographical Science, Institute of Remote Sensing Science and Engineering, Beijing Normal University, Beijing 100875, China
4
School of Geographical Sciences, Qinghai Normal University, Xining 810016, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2021, 13(6), 1179; https://doi.org/10.3390/rs13061179
Submission received: 2 February 2021 / Revised: 25 February 2021 / Accepted: 17 March 2021 / Published: 19 March 2021
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Abstract

Previous research on the effects of drought on vegetation productivity seldom distinguished the different responses of vegetation ecosystems to drought under different management practices and different land use systems. Studies investigating whether irrigation can buffer the negative impacts of drought on vegetation usually used discontinuous yield data in distribution. In this study, the trends in drought and vegetation productivity in farmlands in the drylands of northern China (DNC) from 2000 to 2018 were studied using the self-calibrated Palmer drought severity index (scPDSI) and enhanced vegetation index (EVI). The differences in the impact of drought on vegetation productivity in irrigated farmland, rainfed farmland, and natural vegetation areas were quantified. The results showed that the growing season scPDSI and EVI showed an increasing trend from 2000 to 2018. Significant correlations between drought anomalies and EVI anomalies were found in both arid drylands and semi-arid drylands. In addition, irrigation mitigated 59.66% of the negative impact caused by drought on irrigated farmland EVI in the growing season. The impact of drought on irrigated farmland EVI in the growing season was 19.98% lower than that on natural vegetation EVI. The impact of drought on natural vegetation EVI was 49.59% lower than that on rainfed farmland EVI. The results of this study refine the vegetation response to drought under different land management practices and land use patterns.
Keywords: drought; irrigation; farmland ecosystem; EVI drought; irrigation; farmland ecosystem; EVI
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MDPI and ACS Style

Zhu, X.; Liu, Y.; Xu, K.; Pan, Y. Effects of Drought on Vegetation Productivity of Farmland Ecosystems in the Drylands of Northern China. Remote Sens. 2021, 13, 1179. https://doi.org/10.3390/rs13061179

AMA Style

Zhu X, Liu Y, Xu K, Pan Y. Effects of Drought on Vegetation Productivity of Farmland Ecosystems in the Drylands of Northern China. Remote Sensing. 2021; 13(6):1179. https://doi.org/10.3390/rs13061179

Chicago/Turabian Style

Zhu, Xiufang, Ying Liu, Kun Xu, and Yaozhong Pan. 2021. "Effects of Drought on Vegetation Productivity of Farmland Ecosystems in the Drylands of Northern China" Remote Sensing 13, no. 6: 1179. https://doi.org/10.3390/rs13061179

APA Style

Zhu, X., Liu, Y., Xu, K., & Pan, Y. (2021). Effects of Drought on Vegetation Productivity of Farmland Ecosystems in the Drylands of Northern China. Remote Sensing, 13(6), 1179. https://doi.org/10.3390/rs13061179

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