摘要
[目的]在现有评价指标中增加气候因子以优化遂宁市耕地质量评价指标体系,为准确了解川中丘陵区耕地质量水平提供参考。[方法]采用层次分析法优化四川省遂宁市耕地质量评价指标体系,以10 m×10 m栅格为评价单元,空间量化表达指标并计算隶属度、权重以及耕地质量综合指数(integrated fertility index,IFI)。根据《耕地质量等级:GB/T 33469—2016》(以下简称国标法)的标准划分耕地等级,并将优化指标体系后获得的耕地质量等级评价结果与基于国标法的结果进行对比。[结果](1)各评价指标的权重依次为:立地条件>养分状况>剖面性状>耕层性状>土壤管理>气候条件>健康状况,降水和日照对耕地质量有明显影响;(2)研究区耕地质量以优良为主,IFI介于0.652~0.892之间,均值为0.801,且东西部较高、北部次之、南部较低;(3)优化指标体系后获得的IFI与利用实地调查资料获得的IFI结果相关性较高,R^(2)为0.722;(4)优化指标体系后获得的耕地质量等级评价结果与国标法的结果有较高的一致性,81%的验证点在2种评价结果中相差不超过1个等级,且优化后的评价结果更符合研究区耕地生产的实际情况。[结论]在评价指标体系中增加气候因子能更全面和客观地反映川中丘陵区耕地质量的影响因素,在此基础上基于栅格数据开展耕地质量评价有助于更准确掌握研究区的耕地质量动态。
[Purpose]The study aimed to optimize the current cultivated land quality evaluation system of Suining City by incorporating climatic factor,so as to provide a clear picture of the quality status of cultivated land in the hilly areas of central Sichuan Province.[Method]The quality evaluation index system of cultivated land was optimized by analytic hierarchy process,and the grid-based data(grid size 10 m×10 m)was used as the evaluation unit.The quality indicators were spatially quantified,and the degree of membership,weight and integrated fertility index(IFI)were calculated.whose results were further compared with the classification results generated by the national standard method following national cultivated land quality grade(GB/T 33469—2016).[Result](1)Weights of all indicators in a descending order were as follows:site condition>nutrient status>profile traits>physical and chemical properties of plough layer>soil management>climatic condition>health status.(2)The quality of the cultivated land studied was primarily good,with IFI ranging from 0.652 to 0.892,averaging at 0.801.Cultivated land with higher quality was concentrated in the east and west parts of the region,followed by the land in the north,while the quality of cultivated land in the south was most inferior.(3)IFI generated from the optimized evaluation index system was highly correlated with the IFI from field survey,with R^(2) reaching 0.722.(4)The classification results obtained from the optimized evaluation system were highly consistent with the results of the national standard method,and the discrepancies in land quality were less than 1 grade among 81% of the sites validated.More importantly,the optimized evaluation results were more in line with the actual cultivated land production capacity in the hilly area of central Sichuan.[Conclusion]The evaluation index system incorporating meteorological factors can demonstrate the influencing factors of cultivated land quality in the hilly areas of central Sichuan more comprehensively and objectively compared,which was contributed to a dynamic quality evaluation of cultivated land with higher precision on grid-based data.
作者
田鹏
冯文兰
秦鱼生
陈琨
卢晨媛
TIAN Peng;FENG Wenlan;QIN Yusheng;CHEN Kun;LU Chenyuan(College of Resources and Environment,Chengdu University of Information Technology,Chengdu,Sichuan 610225,China;Institute of Agricultural Resources and Environment,Sichuan Academy of Agricultural Sciences,Chengdu,Sichuan 610066,China)
出处
《亚热带农业研究》
2022年第2期123-130,共8页
Subtropical Agriculture Research
基金
国家重点研发计划课题(2016YFD0300907)
四川省农业科学院现代农业学科建设推进工程(2021XKJS015)。
关键词
耕地质量等级
层次分析法
气象因子
遂宁市
cultivated land quality grade
analytic hierarchy process
meteorological factor
Suining City
