Modeling long-term yield trends of Miscanthus×giganteus using experimental data from across Europe
Modeling long-term yield trends of Miscanthus×giganteus using experimental data from across Europe
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使用欧洲各地的实验数据模拟芒草的长期产量趋势
DOI：
10.1016/j.fcr.2013.05.004
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发表时间：
2013
影响因子：
5.8
通讯作者：
Lesur C
中科院分区：
文献类型：
--
作者：
Lesur C
芒草是一种多年生禾本科植物，被认为具有很高的生物能源生产的原料潜力。然而，对这一潜力的评估与作物产量及其在作物寿命期间的变化密切相关，预计作物寿命将超过20年。众所周知，甘蔗有一个建立阶段，在此期间，年产量随着作物年龄的增加而增加，然后是一个上限阶段，其持续时间未知。我们建立了一个数据库，包括16个欧洲长期实验（i）描述建立和天花板阶段的产量演变和（ii）以确定是否M。最高阶段之后是下降阶段，收益率逐年下降。通过一组统计增长模型之间的比较来分析数据。最适合实验数据的模型包括一个下降阶段。下降强度和其他几个模型参数的值，如在天花板阶段或建立阶段的持续时间达到的最高产量，是高度可变的。最高的最大产量在位于南部的研究区域的实验和建立阶段的持续时间是密切相关的建立方法。由于充满活力的生存能力和盈利能力的M。尽管这些结果对产量的影响很大，但可以将这些结果纳入进一步的评估工作。
Miscanthus×giganteusis a perennial grass that is considered to have a high feedstock potential for bioenergy production. Assessment of that potential is however highly related to the crop yields and to their change through the crop lifetime, which is expected to be longer than 20 years.M. giganteusis known to have an establishment phase during which annual yields increased as a function of crop age, followed by a ceiling phase, the duration of which is unknown. We built a database including 16 European long-term experiments (i) to describe the yield evolution during the establishment and the ceiling phases and (ii) to determine whetherM. giganteusceiling phase is followed by a decline phase where yields decrease across years. Data were analyzed through comparisons between a set of statistical growth models. The model that best fitted the experimental data included a decline phase. The decline intensity and the value of several other model parameters, such as the maximum yield reached during the ceiling phase or the duration of the establishment phase, were highly variable. The highest maximum yields were obtained in the experiments located in the southern part of the studied area and the duration of the establishment phase was strongly related to the establishment method. Since energetic viability and profitability ofM. giganteushinge critically on yields, these results could be integrated in further assessment works.