Welcome to Journal of Agriculture,

Journal of Agriculture ›› 2025, Vol. 15 ›› Issue (9): 21-29.doi: 10.11923/j.issn.2095-4050.cjas2024-0123

Previous Articles     Next Articles

Quality Evaluation of Cultivated Land and Soil Nutrient Status in Ningjinpo-Daluze Low Plain Area

SUN Yuqiang1(), FANG Zhu1(), XIAO Hui1, ZHANG Jianfa2, JIA Ying2, LI Danlin3, ZHAO Yanna4   

  1. 1 Hebei Province Cultivated Land Quality Monitoring and Protection Center, Shijiazhuang 050010
    2 Cultivated Land Quality Monitoring and Protection Station of Xingtai Agricultural Service Center, Xingtai Hebei 054001
    3 Shenzhou Agriculture and Rural Bureau, Shenzhou Hebei 053800
    4 Hebei GEO University, Shijiazhuang 050030
  • Received:2024-06-24 Revised:2024-09-06 Online:2025-09-17 Published:2025-09-17

Abstract:

Through the 2022 Hebei Province Farmland Quality Evaluation Project, data from farmland quality monitoring points in eight counties of the Ningjinbo-Daluze low plain area were summarized and analyzed to evaluate the quality of farmland and soil nutrient status in the region. Using the grid method to evenly arrange sample evaluation units, the five-point method was adopted to collect cultivated soil samples from the surface layer (0-20 cm), and laboratory tests were conducted according to the soil testing series standards. Referring to the National Farmland Quality Grade Evaluation Index System of the Ministry of Agriculture and Rural Affairs, the weight of the indicators was determined. For numerical indicators of organic matter, total nitrogen, available phosphorus, and available potassium, the membership degree was determined by establishing functional relationships. For other conceptual indicators, the Delphi method expert scoring was used to give the membership degree, and the cumulative method was used to calculate the comprehensive index of arable land quality to obtain the arable land quality grade. The results showed that the average quality grade of cultivated land in the area was 3.51, with the main cultivated land grades being third and fourth grade. The third grade cultivated land was the main body, with an area of 140191 hm2, accounting for 49.44% of the total cultivated land area in the area. The overall level of nutrients in the cultivated land in this area was relatively high, all of which were above level three. Nutrients were evenly distributed within the region, and the maximum values of organic matter, total nitrogen, available phosphorus, and available potassium appeared around the ancient Daluze marsh land. By analyzing the factors affecting the quality evaluation of cultivated land, such as irrigation guarantee, the texture and configuration of the plow layer, and the reserve of organic matter content, measures and suggestions for maintaining the quality level of cultivated land in the region were proposed, providing reference for soil nutrient monitoring, improving cultivated land quality, protecting ecological balance, and maintaining sustainable agricultural development in other low plain areas in Hebei Province.

Key words: Ningjinbo-Daluze, low plain area, quality of cultivated land, soil nutrient, comprehensive index