Plastic film mulching significantly boosts crop production and water use efficiency but not evapotranspiration in China

Liangang Xiao, Xi Wei, Chunying Wang and Rongqin Zhao

Agricultural Water Management, 2023, vol. 275, issue C

Abstract: It is a huge challenge for China to produce enough food on its own croplands to feed a population of over 1.4 billion. Plastic film mulching technology has been applied widely in the past decades and China represents a major player in terms of plastic film use in the world. So far, a series of field experiments have been conducted across the croplands to investigate the effects of plastic film mulching on crop productivity. This offers an opportunity to comprehensively identify the crop yield and water use improvement potential and their key drivers based on local environmental conditions. Here, a synthetic analysis was conducted to illustrate the overall effects of plastic film mulching on relative changes in crop yield, water use efficiency (WUE), and evapotranspiration (ET), as well as the key impacting factors behind the changes. The results showed that plastic film mulching significantly increased crop yield by 39.5% and WUE by 37.9%, whereas the increase of ET under plastic film mulching (1.9%) was insignificant. The crop yield improvement under traditional film was significantly higher than that under degradable film, whereas the difference of crop yield improvement between film colours was not significant. Furthermore, crop yield and WUE improvements varied among different cropping regions and crop species, and were influenced by mean annual precipitation (MAP), mean annual temperature (MAT), elevation, and soil organic carbon (SOC) concentration. Generally, the performance of plastic film mulching in sustaining crop production was better in regions with poor environmental conditions, including low temperature and precipitation, high elevation, and poor SOC content. Unlike the significant increases of yield and WUE in most cases, the changes in ET varied among groups, ranging from significant decline to insignificant change to significant increase. The results of this study illustrate that plastic film mulching plays a critical role in terms of promoting crop production, improving water use, increasing farmers’ income and securing food security. The successful application of plastic film mulching in China may have important implications for other developing regions in the world to overcome the severe problems of food shortage. However, the adverse effects on environment must be properly addressed by upgrading mulching film materials in the future.

Keywords: Food security; Plastic film mulching; Crop yield, Water use efficiency; Evapotranspiration; China (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378377422005704
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:275:y:2023:i:c:s0378377422005704

DOI: 10.1016/j.agwat.2022.108023

Access Statistics for this article

Agricultural Water Management is currently edited by B.E. Clothier, W. Dierickx, J. Oster and D. Wichelns

More articles in Agricultural Water Management from Elsevier
Bibliographic data for series maintained by Catherine Liu ().