Research on the spatial distribution characteristics of arable land economic quality composite grade and ecology environment in Yunnan Province, China

ABSTRACT

ABSTRACT Understanding the distribution characteristics of arable land in Yunnan Province is of significant importance to make scientific decisionsto use and improve the quality of arable land. In this study, the distribution characteristics of the arable land grade including 129 counties were analyzed based on the accomplishment of cultivated land classification in Yunnan Province. The results showed that the average economic quality composite grade was 2.9, in a range of 1 to 13, which means that the economic quality of arable landof Yunnan Province is relatively lower. In excellent zone, the grade ranges from 1 to 10, and the average grade is 2.4. In good zone, it ranges from 1~13, and the average grade is 3.1. In medium zone, it ranges from 1~12, and the average value is 3.2. In poor zone, it ranges from 1~11, and the average is 3. In worse zone, it ranges from 1~10, and the average is 2.2. The middle and poor arable land has the largest area, which concentrated in the middle and poor zones and dominantly influenced the average grade in the whole province. This research will serve as a reference forarable landpolicy making in the future, especiallyon apace arrangement optimization, quality improvement and ecology environment protection in Yunnan Province.