Key message

The diameter at breast height of the largest sprout per coppiced stool proved to be accurate for the total sprout biomass estimates at stand level.

Abstract

Traditional coppicing is one of the oldest silvicultural systems for biomass production. However, a quick and simple biomass estimate methodology across the entire growth period is lacking. The objective of this study was to find the sprout parameters that need to be measured for accurate sprout estimates as well as to find a necessary minimum number of sprouts for these estimates. Using data from 20 sample Turkey oak multi-stem trees, we modelled sprout biomass as a function of an increasing number of sprouts in interaction with different sprout parameters in a later post-resprouting period. Results showed that the DBH of only two of the largest sprouts per stump proved to be accurate estimators of the total sprout biomass of the individual stool. For sprout biomass estimates at stand level, we recommend measuring the DBH of the largest sprout within each stool in a plot and then calculating and summing the estimated sprout biomasses of the individual stools. This study illustrates that the biomass can simply be estimated by easily measured parameters of sprouts; therefore, the multi-stemmed trees can be easily included into the yield or ecosystem studies of woody vegetation with less time-consuming measurements.

中文翻译：

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有效测定橡树科植物中的生物量

关键信息

事实证明，每只粪便最大发芽的胸高直径对于林分水平的总发芽生物量估计是准确的。

抽象

传统的育种是用于生物质生产的最古老的造林系统之一。但是，缺乏在整个生长期的快速简单的生物量估算方法。这项研究的目的是找到准确进行芽估计所需的芽参数，以及为这些估计找到必要的最小芽数量。使用来自20个土耳其橡木多茎树样品的数据，我们在较新的后期繁殖期中将发芽生物量建模为与不同发芽参数相互作用的发芽数量增加的函数。结果表明，每个树桩中只有两个最大的新芽的DBH被证明是单个粪便总新芽生物量的准确估计值。对于林分水平的新芽生物量估算，我们建议测量图中每个粪便中最大芽的DBH，然后计算和求和各个粪便的估计芽生物量。这项研究表明，可以通过容易测量的新芽参数简单地估算生物量。因此，多茎树木可以轻松地纳入木本植物的产量或生态系统研究中，而耗时较少。