不同经营类型毛竹林营养元素的空间分布

Distribution of nutrient elements in different organs of Phyllostachys pubescens under different managements

对不同经营类型毛竹Phyllostachys pubescens氮、磷、钾、钙、镁等5种营养元素的质量分数和林地土壤的样品进行分析。结果表明:氮、磷、钾、钙、镁等5种营养元素在不同经营类型毛竹的不同器官中质量分数大小均表现为叶>枝>秆;在叶中各营养元素质量分数大小顺序为:氮>钾>镁>钙>磷;在枝中为:钾>氮>镁>磷>钙;在秆中为:钾>氮>镁>钙>磷。毛竹叶、枝、秆中部分营养元素质量分数与土壤养分质量分数的相关性达显著或极显著水平。在集约经营下,毛竹林地上部分5种营养元素贮藏总量为519.60 kg.hm-2,粗放经营下为422.44 kg.hm-2。

The contents of N, P, K Ca and Mg in different organs of Phyllostachys pubescens and soil nutrients under different managements were analyzed in July 2002. The results showed that the contents of five nutrient elements in leaf is more than those in branch, and those in stem is lowest. And the content order of nutrient elements from high to low is N, K, Mg, Ca, P in leaf, K, N, Ma, P, Ca in branch, K, N, Mg, Ca, P in stem. Some nutrient elements in Ph. pubescens have a good relation to soil nutrients. Total storage of five nutrient elements in above-ground Ph. pubescens woods was 519.60 kg·hm^-2 under intensive management, and 422.44 kg · hm^-2 under extensive management. [ Ch, 4 tab. 13 ref. ]