A Novel Phenology-Based Index for Plastic-Mulched Farmland Extraction and Its Application in a Typical Agricultural Region of China Using Sentinel-2 Imagery and Google Earth Engine

Xinyu Dong, Jiaguo Li (), Ning Xu, Junjie Lei, Zhen He and Limin Zhao
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Xinyu Dong: College of Surveying and Planning, Shangqiu Normal University, Shangqiu 476000, China
Jiaguo Li: Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
Ning Xu: College of Surveying and Planning, Shangqiu Normal University, Shangqiu 476000, China
Junjie Lei: College of Surveying and Planning, Shangqiu Normal University, Shangqiu 476000, China
Zhen He: College of Surveying and Planning, Shangqiu Normal University, Shangqiu 476000, China
Limin Zhao: Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

Land, 2024, vol. 13, issue 11, 1-23

Abstract: Plastic-mulching technology has a crucial role to play in modern agriculture by optimizing crop growth environments and enhancing yields. Accurately detecting and mapping the distribution of plastic-mulched farmlands (PMFs) is essential for improving both agricultural management and production efficiency. By analyzing the temporal spectral characteristics of PMFs and crop phenological information, we developed a phenology-based plastic-mulched farmland index (PPMFI). This index, when combined with Sentinel-2 imagery and an automated high-precision extraction process via the Google Earth Engine platform, effectively distinguishes PMFs from other land cover types, especially in complex agricultural landscapes. Validation across areas varying in their background complexity and PMF coverage demonstrated that the proposed PPMFI consistently achieves an overall accuracy rate that exceeds 90%, showcasing its robust performance and significantly outperforming other comparative extraction methods. Applying the PPMFI to the Yudong agricultural region of Henan Province, China, further confirmed its capability for large-scale PMF monitoring, thereby offering critical technical support for sustainable agricultural management and environmental protection.

Keywords: plastic-mulched farmland; GEE; Sentinel-2 MSI; phenology; extraction; Yudong agricultural region; PPMFI (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2024
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