集约经营毛竹林土壤养分空间变异特征初探

Spatial variability of soil nutrients for an intensively managed Phyllostachys pubescens forest

利用地统计学方法初步分析了浙江省安吉县河干村经过20 a集约经营的毛竹Phyllostachys pubescens林土壤养分变异情况。结果表明:①安吉县河干村毛竹林土壤中pH值、全氮、碱解氮、有效磷、速效钾、有机质属于中等变异。②在本研究采样尺度下,土壤中碱解氮和速效钾的变异主要受自然因素的影响,但全氮和有机质的变异受到随机性因素和结构性因素共同影响。③土壤养分的分数维值(D)大小排列顺序为碱解氮(D=1.969)>速效钾(D=1.958)>有机质(D=1.798)>全氮(D=1.787)。

This research used geostatistics method to analyze the spatial characteristics of a 20-year, intensively managed, moso bamboo （Phyllostachys pubescens） forest in Hegan of Anji County. Results showed that 1） organic matter, pH, total nitrogen（TN）, rapidly available nitrogen（N）, available phosphorus（P） and rapidly available potassium （K） of the bamboo forest soil were moderately variant; 2） natural factors mainly caused spatial variability in N and K, but random and natural factors together caused spatial variability of TN and organic matter; 3） the order of fractal values for the moso bamboo forest was P 〉 N 〉 K 〉 organic matter 〉 TN. [Ch, 3 tab. 11 ref.]