松嫩平原北部农牧复合区耕地地力质量评价

为了获取黑龙江省松嫩平原北部农田精确质量评价结果,采用ARCGIS平台、DELPH(特尔斐)模型与AHP结合专家经验对选取的1988个土壤样本进行了质量评分,并根据累计曲线法划分地力等级。结果表明:研究区1级耕地占总面积的5.13%;2级耕地占22.45%;3级耕地占44.98%;4级耕地占22.62%;5级耕地占4.82%。为准确地反映了该研究区域耕地土壤质量的差异。

Evaluation on Quality of Farmland in Farming-Pastoral Zone in the North of Songnen Plain

Delph model and AHP method,together with the expert experience,were applied to the quality evaluation of farmland in the north of Songnen Plain in Heilongjiang Province in order to acquire accurate evaluation results of the quality of farmland.A total of 1988 typical soil samples were used to carry out this evaluation.The quality of the farmland was classified by the accumulation curve method.Results show that the first-class to the fifth-class of the arable land in the study area account for 5.13%,22.45%,44.98%,22.62% and 4.82% of the total area of cultivated land,respectively.The working efficiency could be improved when the data were managed by GIS system and the data of field samples were automatically classified into different evaluation units.It proves that the accuracy reached 94.8%.The evaluation method could accurately reflect the difference in soil quality of farmland in Songnen Plain.