上阔下竹混交林对竹林土壤养分的影响

Effects of Phyllostachys edulis and broad-leaved mixed forest on soil nutrient content

以闽北地区不同比例的上阔下竹混交林Ⅰ(28.3%)、Ⅱ(22.5%)、Ⅲ(20.1%)和毛竹纯林Ⅳ(0)为研究对象,对竹林土壤养分进行分析。结果表明:相同坡位之间,类型Ⅳ土壤pH最低;类型Ⅰ、Ⅱ、Ⅲ竹林表层土壤有机质、水解氮、有效磷和有效硼含量均明显高于类型Ⅳ(P<0.05);土壤有效态养分含量之间也存在极显著相关性,各类型毛竹林土壤综合肥力顺序为Ⅰ>Ⅲ>Ⅱ>Ⅳ,表明上位阔叶林对毛竹林土壤肥力具有一定的改善作用。

By taking the different proportions moso bamboo and broad-leaved mixed forests[Ⅰ（28.3%）,Ⅱ（22.5%）,Ⅲ（20.1%）]and moso bamboo pure forest[Ⅳ（0）]in north of Fujian as test materials,the soil nutritional of the forests in different depths were analyzed.The results showed that the soil pH of type Ⅳ was the lowest,the surface soil organic matter and available N,P,and B content of typeⅠ,Ⅱ and Ⅲ were significantly higher than those in type Ⅳ（P ＆lt;0.05）;It was highly significant correlated between the soil nutritionals,and the order of integrated fertility index in different types of moso bamboo forests were Ⅰ ＆gt;Ⅲ ＆gt;Ⅱ ＆gt;Ⅳ,which showed that the upper broad-leaves forests had some improvements on the soil nutritional of the lower moso bamboo for-est.