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首页> 外文期刊>International Journal of Forestry Research >Effect of Thinning and Harvest Type on Storage and Losses of Phosphorous inPinus taedaL. Plantations in Subtropical Argentina
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Effect of Thinning and Harvest Type on Storage and Losses of Phosphorous inPinus taedaL. Plantations in Subtropical Argentina

机译：间伐和收获类型对taeda松磷贮藏和损失的影响。亚热带阿根廷的人工林

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摘要

The aim of this study was to evaluate the effect of thinning intensity and different harvest types on ecosystem P conservation in 20-year-oldPinus taedaplantation ecosystems at Misiones province, Argentina. The plantation was established in 1985, thinned at three intensities—0, 33, and 66% of basal area of control plots removed by thinning—and harvested in 2005. The nutrient content at harvest was determined for tree, shrub, and herb layers, the forest floor and upper mineral soil. Two harvest types were simulated: stem only and whole tree. Total P content was 56.8, 46.8, and 38.6 kg· ha−1for 0, 33, and 66% thinning, respectively. Total P exported by harvest was different among treatments, the highest at 0% thinning treatment. Phosphorus stability index values indicated that the P most conservative management option is 66% thinning, harvest of stem only and retention of forest floor, understory, and harvest residues.
机译：这项研究的目的是评估稀疏强度和不同收获类型对阿根廷米西奥内斯省20岁的针叶林种植生态系统中磷素养护的影响。人工林成立于1985年，在3种强度下进行稀疏，即通过稀疏去除对照样地的基础面积的0％，33％和66％，并于2005年收获。在收获时确定了树木，灌木和草本层的营养成分，森林地面和上层矿物土壤。模拟了两种收获类型：仅茎和整棵树。总磷含量分别为0、33和66％稀薄，分别为56.8、46.8和38.6 kg·ha-1。不同处理之间，收获物输出的总磷不同，间伐处理0％时最高。磷稳定指数值表明，最保守的磷管理方案是减薄66％，仅收获茎和保留林木，林下和收获残留物。

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