松阳县毛竹林土壤养分贫瘠化评价

Evaluation of Soil Nutrient Depletion in Phyllostachys heterocycla cv. pubescens Stand in Songyang

摘要: 2014年12月至2015年1月采集浙江省松阳县5个乡镇18个村144个样点的毛竹（Phyllostachys heterocycla cv. pubescens）林0 ~ 30 cm土壤，对其pH、有机质、全氮、碱解氮、全磷、有效磷、速效钾6个指标进行了测试分析及贫瘠化评价。结果表明：松阳县毛竹林土壤pH值范围在3.90 ~ 5.60，处在毛竹适生范围（pH4.5 ~ 7.0）；表层土壤有机质含量较高，平均为42.94 g/kg，全氮含量平均2.15 g/kg，碱解氮平均含量为159.79 mg/kg，有效磷平均含量为2.27 mg/kg，速效钾平均含量为61.28 mg/kg。松阳县毛竹林土壤养分存在富氮低磷缺钾的现象，不同乡村间毛竹林土壤养分失调的种类和程度有较大变化。

Abstract: Determinations were conducted on pH, organic substances content, total N, available N, total P, available P, and available K of soil at 0-30cm from 144 sample plots of Phyllostachys heterocycla cv. pubescens stand in 18 villages of 5 towns in Songyang, Zhejiang province from December of 2014 to January of 2015. The results showed that pH ranged 3.90-5.60, while pH 4.5-7.0 is suitable for bamboo growth, mean organic substances content was 42.94g/kg, total N 2.15g/kg, available N 159.79mg/kg, available P 2.27mg/kg, available K 61.28mg/kg. Evaluations demonstrated that soil N at bamboo stand in Songyang was too much, P and K was strongly depleted, and there were difference of soil nutrient depletion among different villages.