在我国东北的北部,黑龙江省北安县五大莲池地区,纵横四十多里,分布着两百多年前火山喷出的熔岩和在熔岩上发育着的各种不同发育阶段的土壤,它们和植被有着密切的关系,大概可分为三种类型:1.熔岩上在地衣、苔藓复盖下刚开始发育的原始土壤。2.在山顶柞树、榛材复盖下轻度发育的生草土。3.在 In the northern part of northeast China, the Wudalianchi area in Bei’an County, Heilongjiang Province, is more than 40 miles vertically and vertically, with lava emanating from volcanic eruptions over 200 years ago and soils of various developmental stages developed on lava Vegetation is closely related, probably can be divided into three types: 1. Lava in the lichens, moss covered the beginning of the initial development of the soil. 2. On the top of oak tree, hazelwood covered under the mild development of grassland. At