黑龙江省嫩江地区,在中国自然区划中划归为温带半湿润地区草甸草原黑钙土地带。1977年,我们结合荒地资源考察,对该区自然条件及其分异规律进行了多学科调查,1978年,又针对该区自然带的分异问题进行补充考察。

Nenjiang area is located in western Heilongjiong province. According to compre-hensive physical regionalization of China (1959). this area is wholly delimited tem-perate subhumid region and meadow steppe-black earth zone. Yet, according to our own field investigation in 1977-1978, two natural regions and three natural zone have been identified.Firstly, based upon temperature and moisture condition, the area may be divided into temperate sub-humid and temperate semi-arid natural regions, secondly based upon vegetation-soil criteria, temperate sub-humid region may be sub-divided into two natural zones: forest-steppe-black earth zone and meadow-steppe-chernozem, zone; and temperate semi-arid region contains only one natural zone-steppe-chestnut soil zone.In regard to agricultural development, forest-steppe-black earth zone should be devoted mainly to agriculture, secondly to forestry and thirdly to pasture; meadow-steppe-chernozem zone mainly to agriculture, secondly to pasture and thirdly to forestry; while steppe-chestnut soil zone mainly to pasture, partly to agriculture and forestry.