Abstract:

To analyze the quantitative characteristics, spatial distribution and limiting factors of different types of cultivated land in Luohe City, Henan Province, and put forward specific protection measures, a comprehensive evaluation system with 17 selected indexes was constructed. By means of analytic hierarchy process and membership function method, the weight value and membership degree of each index were studied. The authors calculated the comprehensive indexes and grades according to natural breakpoint method. The results showed that: (1) the quality of cultivated land decreased from northeast to southwest in Luohe City, among which the quality of cultivated land in Linying County, Yancheng District, Yuanhui District and most of Zhaoling District was relatively high, and the quality of cultivated land in southwest Wuyang County and northern Zhaoling District was relatively poor; (2) the proportion of superior land, higher land, middle land and lower land in Luohe City was 12.48%, 39.28%, 38.58% and 9.67%, respectively, and the quality level of cultivated land needs to be further improved; (3) according to the main restrictive factors such as soil nutrient status, farmland infrastructure construction and soil barrier factors, the corresponding improvement measures were implemented. This study provides effective references for strengthening cultivated land quality construction and enhancing agricultural production capacity in Luohe City.

Key words: cultivated land quality, indicator system, hierarchical analysis, classification, comprehensive evaluation, protection measures