关键词: 黄河三角洲, 土地质量评价, 模糊数学

Abstract: In view of the complexity of the land itself and the characteristics of the blur existing in land quality evaluation, this paper applies the method of "multistage fuzzy synthetical judgement" in fuzzy mathematics to evaluate the land quality.The quality of the land in the Yellow River Delta can be divided into eight grades and thirteen classes. The result of the evaluation shows that the proportion of high-class land is relatively small, the general quality of the land is relatively low, but the land has potential superiority. In terms of the multi-porpose agriculture, considering the suitability of the land and its coordination with other natural resources we can say that the region possesses the conditions for setting up powerful bases of farming, animal husbandry and fishery.As an exploration of the evaluation method, after analysing and checking the evaluation results, this paper considers that the "fuzzy remark" contains rich quality messages which can well reflect the all-round quality and the main restricting factors, and that the evaluation results have relatively high accuracy. Therefore it is scientific and feasible to use the method of fuzzy mathematics in evaluating the land quality.

Key words: the Yellow River Delta, evaluation of land quality, fuzzy mathematics