ABSTRACT

To examine the potential for natural regeneration of Picea glehnii, seeds and current-year seedlings were evaluated at a scarification site. Three surface-soil treatments of different scarification intensity were used: removed, organic soil was mostly removed from the site; remained, some soil remained at the site; and replaced, the soil was removed but replaced. Seeds were sown in the fall, and samples were collected in the following spring to examine the rot rate by fungi. Germination, mortality, growth, and mycorrhiza formation rate of the seedlings were recorded in the first growing season. The seed rot rate was generally low, and no significant differences among surface-soil treatments were observed. The germination rate was higher in the removed treatment than in the other treatments, but seedling survival was lower, and the final seedling density was similar to that in the replaced treatment. Seedling total weight and ectomycorrhizal formation rate were higher in the replaced treatment than in the removed treatment, suggesting that the higher amount of organic soil at the site led to better growth at least in the first growing season. Correlation analysis indicated that a high soil moisture content associated with the presence of organic soil contributed to survival and growth.

摘要

检查云杉云杉天然更新的潜力，在疏松地点评估种子和当年幼苗。使用了三种具有不同疏松强度的表面土壤处理方法：去除土壤，去除土壤中的有机土壤；去除土壤有机质。仍然存在，一些土壤仍然留在现场；并替换，土壤被去除但被替换。秋季播种，第二年春季收集样品，检查真菌的腐烂率。在第一个生长季节记录幼苗的发芽，死亡率，生长和菌根形成率。种子腐烂率通常较低，并且在表面土壤处理之间未观察到显着差异。移出处理的发芽率高于其他处理，但幼苗存活率较低，并且最终幼苗密度与替代处理相似。替代处理的幼苗总重量和外生菌根形成率高于移除处理，这表明该部位较高的有机土壤量至少在第一个生长季节导致更好的生长。相关分析表明，高土壤水分与有机土壤的存在有关，有助于生存和生长。