塞罕坝国家级自然保护区土壤类型分布与演变

该自然保护区土壤包括6大土类,11个亚类,18个土属,32个土种;各土类中以棕壤类含土种最多,其次为灰色森林土类,最少的为黑土类。自然保护区中土壤垂直分布(由低到高)顺序是:棕壤—灰色森林土—黑土;水平分布是:东部为黑土,中部为灰色森林土,西部为风沙土。该保护区土壤演变趋势为:棕壤向灰化棕壤过渡,风沙土向灰色森林土方向发育,灰色森林土向风沙土方向转变,草甸土和沼泽土有向地带性土壤演变的趋势。

Soil Types Distribution and Evolution of Saihanba National Nature Reserve

There are 6 main soil types,11 soil subclass and 32 soil species in the national nature reserve.The brown soil type contained the most soil species,the greyforest soil was second and the black soil was least.The sequence of vertical distribution of soils from the low to the high was brown soilgrey forestsoil-black soil and that of Horizontal distribution of soil was the black soil in the east,grey forest soil in the middle area and wind-sand soil in the west.The soil evolution tendency was as follows as that the brown soil was changing into grey-brown soil,the wind-sand soil was developing to the grey forest soil which was turning to the wind-sand soil.The meadow soil and bog soil were evolving towards the zonal soils.