苗木生长必须不断地从土壤中吸取N、P、K等各种养分。为保持土壤养分平衡,使土壤肥力不致于衰竭,必须向土壤中施入失去的各种养分。即在不同的土壤条件下确定最佳施肥种类、施肥量、比例、次数及施用方法,以保持土壤的肥沃度。为此,我们在带岭苗圃,对小兴安岭的主要更新造林树种之一的云杉苗木,进行了为期3年的施肥效应研究,现将结果报告如下。 Seedling growth must continue to learn from the soil N, P, K and other nutrients. In order to maintain the balance of soil nutrients, so that soil fertility will not be exhausted, the soil must be applied to lose a variety of nutrients. In different soil conditions to determine the best type of fertilizer, fertilizer, the proportion of, frequency and application methods to maintain soil fertility. For this reason, we conducted a three-year fertilizer effect study on spruce seedlings, one of the major rejuvenating tree species in the Xiaoxing’an Mountains, in Taling Ridge Nursery, and the results are reported below.