试论吉林省东部山地的盆谷地土壤生态系统

ON BASIN—VALLEY SOIL ECOSYSTEMS OF EASTERN MOUNTAIN AREA IN JI LIN PROVINCE

吉林省东部山地中的盆谷地土壤生态环境的垂直分化,导致了盆谷地土壤生态系统按地形从低到高依次分化为不同的盆谷地土壤生态单元:盆谷地河漫沼泽土生态单元;盆谷地阶地草甸土生态单元;盆谷地台地白浆土生态单元;盆各地低山丘陵暗棕壤生态单元;盆谷地中山棕色针叶林土生态单元。盆谷地土壤生态系统的各个土壤生态单元分别具有各自的地方气候、地形条件、土壤类型和资源优势,因此它们有着不同的经营方向。这正是对盆谷地自然资源立体开发的客观依据。农、林、牧综合发展,互相促进,是充分发挥盆谷地土壤生态系统的生态功能,获得最大经济效益的途径。

The vertical changes of basin-valley soil ecological environm- ents of eastern mountain area in Jilin Provinde lead to the soil ecosystems' changes,that make them appear as different soil ecological unitis according to the relief's difference from the low region to the high region.They are the basin-valley flood plain bog soil ecological unit,the basin-valley terrace meadow soil ecological unit,the basin-valley platform Bai Jiang soil eco- logical unit,the basin-valley Low mountain and dark brown for- est soil ecological unit and the basin-valley medium mountan brown coniferous forest soil ecological unit. Each soil ecological unit of the basin-valley soil ecosystems has its own particular local climates,relief conditions,soil typ- es and resource advantages,therefore,it has a different develop- ing direction from the others'.This is just the objective basis that can be used to vertically developments and mutual improv- ements among agriculture,forestry and animal husbandry are the way to make fully use of the ecological functions of the basin- valley soil ecosystems and get the highest economic profits.