The purpose of this study is to review the existing research on the protected agriculture-induced farmland transition,offer guidance for future research,and develop a theory of protected agriculture-driven farmland transition.Methods of documentation and induction analysis were employed.The research results show that(1)The transition of farmland caused by protected agriculture is a rational decision for farmers who want to use greenhouse technology to address the scarcity of land resources.Its fundamental procedure entails increasing the intense margin relying on agricultural technology improvement.(2)The current research continues to use the classic measuring techniques for farmland transition indicators,concentrating on scale and structure indicators in the dominant morphology and giving more attention to input,output,price,etc.in the recessive morphology.(3)Due to data gathering limitations and other issues,a precise description of the spatiotemporal protected agriculture-induced farmland transition is currently missing from the standpoint of spatiotemporal evolution.In the absence of micro-scale investigations,the majority of current research examines the macro-scale protected agriculture-induced farmland change using remote sensing or statistical data.Its environmental and socio-economic factors have been extensively studied using econometric approaches,and mechanism analysis is still done at the macroregional level.(4)There is a lack of a complete investigation of its multifaceted consequences from a comprehensive perspective,and the analysis of its economic or environmental repercussions is frequently constrained to a single perspective of agricultural economics or environmental science.This paper concludes that future research should expand on the micro-mechanism of protected agriculture's influence on farmland transition,innovate"environmental-economic"benefit trade-off analysis theories and methods,and investigate ways to transform farmland use in a sustainable and intensive manner.It should also support sustainable farmland use.
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