试论根据土壤生产潜力及土地利用强度评价土地利用合理性问题——以加拿大渥太华市郊为例

土地利用的合理性取决于土地利用强度是否与土壤生产潜力相适宜。土地利用强度等级与土壤生产潜力级别的一致性是一地区土地利用合理性的标志。依据作物系统编制的农业土地利用系统图较传统的土地覆盖图有更大的实用性。可利用该图与土壤生产潜力图迭加制成的农业资源分区图来分析1978—1987年渥太华市郊土地利用的合理性。结果指出,渥太华市郊土地利用方式基本上是合理的,变化趋势也是适宜的,但同时有不足之处,建议当地市政当局对某些不合理的土地利用方式做相应调整。

ON THE RATIONALITY UTILIZATION OF LAND, WHICH EVALUATED WITH SOIL CAPABILITY AND LAND USE INTENSITY——TAKING OTTAWA URBAN FRINGE AS AN EXAMPLE

Presuming that due to land use intensity suitable to soil capability, map of land use systems have more validity over time than conventional "land cover" mapes and that land use intensity defined on the basis of cropping systems are more pragmatic and acceptable to planners and dicision makers. The present paper aims to recommand a new approach of evaluation of the lability of land use to soil capability in order to examine the spatial correspondence of land use intensity, using land use system and land the change as an example, in Ottawa Urban Fringe over the period 1978 to 1987.Outcome of analysing shows that the land use of Ottawa Urban Fringe is basically suitable to soil capability. But In sametime the govenment authorities should change a few not suitable combination of land use intensity with soil capability to keep a good ecological environment and to make the most of the soil capability.