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首页> 外文期刊>Forest Ecology and Management >Decomposition of coarse woody roots and branches in managed Pinus radiata plantations in New Zealand - a time series approach.
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Decomposition of coarse woody roots and branches in managed Pinus radiata plantations in New Zealand - a time series approach.

机译：新西兰人工管理的辐射松人工林粗木根和树枝的分解-一种时间序列方法。

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A time series decay trial was used to determine the decay rate of Pinus radiata (D. Don) woody root and branch material in recently harvested or newly planted forests at eight locations covering a range of climate and soil types in New Zealand. Root and branch initial density was measured in live material and then annually over a period of 4 years. Changes in the density over time were used to estimate the decay rate constants using a single exponential model. Coarse roots decayed faster than branches at most sites. There was no diameter effect on decay rate with a diameter range for roots of 10-152 mm and branches 10-130 mm. Carbon concentration did not change with mass loss but there was a significant increase in nitrogen concentration. The mass of nitrogen in roots and branches was 1.2 times greater than the initial live nitrogen mass when 66-77% of the original live mass remained. Nitrogen mass decreased once mass loss exceeded this value. Exponential models based on mean annual temperature and decay time provided the best estimates of the decay rate of woody roots and branches arising from harvest activities.Digital Object Identifier http://dx.doi.org/10.1016/j.foreco.2011.12.030
机译：使用时间序列衰减试验来确定八种地点最近采伐或新种植的森林中辐射松（D. Don）木本根和分支材料的衰减率在新西兰。在活物质中测量根和分支的初始密度，然后在4年内每年测量一次。密度随时间的变化用于使用单个指数模型估算衰减率常数。在大多数地方，粗根的衰变快于分支。直径对10-152 mm的根和10-130 mm的分支的直径范围没有直径影响。碳浓度不随质量损失而变化，但氮浓度显着增加。当剩余原始活性物质的66-77％时，根和枝中的氮含量是原始活性氮含量的1.2倍。一旦质量损失超过该值，氮质量就会下降。基于年平均温度和衰减时间的指数模型提供了对收获活动引起的木根和树枝衰减速率的最佳估计。数字对象标识符http://dx.doi.org/10.1016/j.foreco.2011.12.030

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