河南省中低产田区占全省耕地面积的 64 .2 0 %。要保证 2 1世纪粮食的安全供给 ,除了靠扩大面积外 ,根本出路在于改造中低产田 ,提高粮食单产。阐述了河南省中低产田的概况 ;分析了形成中低产田的 5个原因 ;首次用模糊聚类法对河南省中低产田进行分析 ,对区域农业宏观管理决策提供了科学依据 The middle and low-yielding fields in Henan Province account for 64.2% of the cultivated area of ​​the province. To ensure the supply of food security in the 21st century, apart from expanding its area, the fundamental way out lies in transforming middle and low-yield fields and raising grain yields. The general situation of low and middle-yielding fields in Henan Province is described. Five reasons for the formation of middle- and low-yielding fields are analyzed. For the first time, the fuzzy clustering method is used to analyze the middle and low yielding fields in Henan Province, which provides a scientific basis for the regional macro-