Radial and vertical variation of wood nutrients in Bornean tropical forest trees
Radial and vertical variation of wood nutrients in Bornean tropical forest trees
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婆罗洲热带森林树木木材养分的径向和垂直变化
DOI：
10.1111/btp.13250
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发表时间：
2023
期刊：
影响因子：
2.1
通讯作者：
Inagawa T
中科院分区：
文献类型：
--
作者：
Inagawa T
木本组织中的氮、磷、钾、钙和镁浓度记录很少，但对于了解整棵树的营养利用和储存是必要的。在这里，我们报告木材常量营养素浓度变化径向和沿着树的长度为10个热带树种在沙巴，马来西亚。树皮养分浓度一直很高：2.9-13.7倍以上的心材取决于营养。与此相反，在木材的径向（边材与心材）和垂直（树干底部与树干中部）的变化是温和的。边材中相对于心材的较高浓度为边材衰老过程中木材养分再吸收提供了经验支持。龙脑香科树种的再吸收率分别为25.3 ± 7.1%（氮）、62.7 ± 11.9%（磷）和56.2 ± 12.5%（钾），而非龙脑香科树种的木材中没有营养再吸收的证据。这表明，虽然dipterocarps有较低的木材养分浓度，这个家庭是能够弥补这一点，利用木材养分吸收作为一种有效的养分保护机制。与其他营养物质相比，钙和镁倾向于在心材中积累。木材密度（WD）表现出很小的垂直变化沿着干。在整个物种（WD范围为0.33至0.94 mg/cm 3），WD与木材P和K浓度呈负相关，与木材Ca浓度呈正相关。由于我们的研究表明树皮中的营养物质浓度异常高，在伐木作业期间将收获的树木的树皮剥皮并留在现场，可以大大有助于保持森林生态系统中的营养物质。
Nitrogen, phosphorus, potassium, calcium, and magnesium concentrations in woody tissue are poorly documented, but are necessary for understanding whole‐tree nutrient use and storage. Here, we report how wood macronutrient concentrations vary radially and along the length of a tree for 10 tropical tree species in Sabah, Malaysia. Bark nutrient concentrations were consistently high: 2.9–13.7 times greater than heartwood depending on the nutrient. In contrast, within the wood both the radial (sapwood vs. heartwood) and vertical (trunk bottom vs. trunk middle) variation was modest. Higher concentrations in sapwood relative to heartwood provide empirical support for wood nutrient resorption during sapwood senescence. Dipterocarp species showed resorption rates of 25.3 ± 7.1% (nitrogen), 62.7 ± 11.9% (phosphorus), and 56.2 ± 12.5% (potassium), respectively, while non‐dipterocarp species showed no evidence of nutrient resorption in wood. This suggests that while dipterocarps have lower wood nutrient concentrations, this family is able to compensate for this by using wood nutrient resorption as an efficient nutrient conservation mechanism. In contrast to other nutrients, calcium and magnesium tended to accumulate in heartwood. Wood density (WD) showed little vertical variation along the trunk. Across the species (WD range of 0.33 to 0.94 mg/cm3), WD was negatively correlated with wood P and K concentration and positively correlated with wood Ca concentration. As our study showed exceptionally high nutrient concentrations in the bark, debarking and leaving the bark of the harvested trees on site during logging operations could substantially contribute to maintaining nutrients within forest ecosystems.
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影响因子：
2.9
作者：
Martin AR;Thomas SC;Zhao Y
通讯作者：
Zhao Y
马来西亚沙巴州热带雨林生态系统中植物养分的总分布
DOI：
--
发表时间：
1997
期刊：
影响因子：
--
作者：
N. Nykvist
通讯作者：
N. Nykvist
伐木会导致热带雨林生态系统严重缺钙：以马来西亚沙巴州为例
DOI：
--
发表时间：
1998
期刊：
影响因子：
--
作者：
N. Nykvist
通讯作者：
N. Nykvist
影响因子：
5.2
作者：
L. Poorter;Adam Mcneil;V. Hurtado;H. Prins;F. Putz
通讯作者：
L. Poorter;Adam Mcneil;V. Hurtado;H. Prins;F. Putz
影响因子：
3.7
作者：
Saner P;Loh YY;Ong RC;Hector A
通讯作者：
Hector A