对安吉县港口乡不同生产力水平毛竹林地土壤理化性质作分析比较 ,得出大片中低产林的土壤肥力障碍因子为土层薄 ( <60cm) ,含石量高 (粒径大于 1mm石砾达 45%～50 %) ,土壤偏实 (容重为 1 2 0～ 1 34g·cm-3 ) ,土壤养分总贮量低 ,养分不平衡 ,氮多磷少 ,尤其是 2 0～ 40cm土层有效磷严重缺乏。以上因子综合影响毛竹的生长。表 4参 9 Analyzed soil physical and chemical properties of Phyllostachys pubescens forest at different productivity levels in Port Township, Anji County, and concluded that soil fertility obstacle factors are thin (<60cm) and high stone content (larger than 1mm gravel) % ~ 50%), soil partiality (bulk density of 120 ~ 134g · cm-3), low total nutrient storage, nutrient imbalance, less nitrogen and phosphorus, especially in 20 ~ 40cm soil available phosphorus severely lacking. The above factors affect the growth of bamboo. Table 4 Participation 9