关键词: 沙地云杉, 沙地云杉, 青海云杉, 土壤水分胁迫, 水势, 自由水, 含水率

Abstract: Based on the methods of literature analysis, comparative analysis and comprehensive induction, we focused on the background and present situation, construction suitability evaluation, benefit evaluation and the influencing factors analysis of high-standard farmland, and compared and analyzed the setting of the evaluation index, the differences of main research methods in principle, advantages and disadvantages, applicability and so on; then, carried out the summary and outlook in the end. The results indicated that: the construction of high-standard farmland had obtained remarkable results, in the study of suitability evaluation before project construction, the orientation of the evaluation index was more inclined to the natural conditions of regional cultivated land; in the study of benefit evaluation after project construction, previous evaluation studies paid more attention to economic benefits, but at present the evaluation of economic, social and ecological benefits became equally important; in the study of influencing factors analysis, the current research was still weak, and there were still few explanations for the differences in the levels of benefit improvement in different construction regions. In view of the research methods, the advantages, disadvantages and applicability of different methods should be considered comprehensively in the future research. This study can provide reference for promoting high-standard farmland construction.