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Genetic and Environmental Influences on First Rotation Shrub Willow ( Salix spp.) Bark and Wood Elemental Composition
BioEnergy Research ( IF 3.6 ) Pub Date : 2020-03-30 , DOI: 10.1007/s12155-020-10122-x
Eric S. Fabio , Lawrence B. Smart

The elemental composition of woody biomass has important consequences for both energy conversion processes and agronomic management of nutrient budgets. In this study, the largest shrub willow yield trial dataset in North America has been leveraged to evaluate the effects of cultivar, growing environment and their interaction on elemental concentrations and content in shrub willow. Stem samples from six commercial cultivars in four trial locations in the Northeastern USA were separated into bark and wood and analyzed for C, N, and H by combustion and for elemental composition by ICP-OES. A second set of samples in the form of whole biomass from the same six cultivars and from six additional trial locations were also analyzed, totaling to 252 total independent observations. A Salix purpurea cultivar had greater N, Mg, and Fe concentrations in bark, whereas S. miyabeana cultivars had high Ca concentrations in both bark and wood. Hybrids between these two species displayed intermediate values. Multivariate analyses of the broader suite of biomass samples showed strong environmental effects on elemental composition, but there were a number of significant cultivar × location interactions. Nutrient export rates at harvest were largely a function of yield. These results showed potential cultivar-specific differences in nutrient uptake, but more broadly the results provide a robust method for nutrient management planning. These findings suggest a capacity to exploit existing genetic resources for improving phytoremediation and excess nutrient management projects.

中文翻译:

遗传和环境影响的第一旋转灌木柳(柳属)树皮和木材元素组成

木质生物质的元素组成对能量转换过程和营养预算的农艺管理都具有重要意义。在这项研究中,已利用北美最大的灌木柳产量试验数据集来评估品种,生长环境及其相互作用对灌木柳中元素浓度和含量的影响。将来自美国东北部四个试验地点的六个商业品种的茎样品分为树皮和木材,并通过燃烧分析C,N和H,并通过ICP-OES分析其元素组成。还分析了来自相同六个品种和六个其他试验地点的第二组全生物质样品,总共进行了252次独立观察。一柳菊品种树皮中的N,Mg和Fe含量较高,而S. miyabeana品种在树皮和木材中的Ca含量较高。这两个物种之间的杂种表现出中间值。对更广泛的生物量样品进行多变量分析表明,其对元素组成具有很强的环境影响,但存在许多显着的品种×位置相互作用。收获时的养分出口率很大程度上取决于产量。这些结果表明了潜在的品种在养分吸收方面的差异,但是从更广泛的意义上来说,该结果为养分管理计划提供了一种可靠的方法。这些发现表明,有能力开发现有的遗传资源来改善植物修复和过量的养分管理项目。
更新日期:2020-03-30
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