Natural variation of biomass yield and nutrient dynamics in Miscanthus
Natural variation of biomass yield and nutrient dynamics in Miscanthus
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芒草生物量产量和养分动态的自然变化
DOI：
10.1016/j.fcr.2013.07.001
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发表时间：
2013-09
影响因子：
5.8
通讯作者：
Hua Zhao
中科院分区：
文献类型：
--
作者：
Lei Yu;Guangda Ding;Zexun Huai;Hua Zhao
由于其潜在的生物质生产潜力，它已被评为最有前途的生物能源作物之一。稻草作为生物能源原料的可持续生产在一定程度上取决于在生产生物质方面养分利用效率高的品种。本研究于2010年3月初在武汉建立了23份来自不同地理区域的麦角种质资源，中国。在2010年11月下旬和2011年底(生理成熟期)对原料进行采样以进行养分浓度测定，并在2011年2月初和2012年初(霜冻过后)进行收获，以评估生物量产量、养分浓度和去除量。在这两年中，生物量产量与原始采集点的纬度呈负相关。与第一个生长年相比，几乎所有的稻种在第二个生长年度的生物量都有显着的增加。MS267和MS321在2010年的产量分别为1.32万吨/公顷−1和1.91百万吨/公顷−1，但生物量产量在2011年大幅增加到11.23万吨/hm2和22.76万吨/公顷−1，导致最终收获时养分的去除更多，因此在接下来的几年里需要更多的肥料。MS92、MS145、MS262、MS436和MS438的生物量较低，头两年平均产量为1万亿吨/公顷−1，这表明它们可能不适合在目前的环境下种植。成熟期和霜冻后的养分浓度差异显著。不同品种间霜冻和除盐后的养分浓度存在显著差异。此外，这一显著差异为获得具有显著生物量和收获时相对养分去除的理想品种提供了可能性。MS434、MS461和MS296具有较高的生物产量和较低的养分去除能力，是一种理想的低投入生物能作物。研究结果对指导养分管理的农艺实践和养分利用效率的遗传改良，以低化肥投入增加生物量生产具有重要意义。
Miscanthushas been rated as one of the most promising bioenergy crops due to its potential for biomass production. The sustainable production ofMiscanthusfor bioenergy feedstock partly depends on the varieties that are efficient in terms of nutrient use for the production of biomass. In this study, 23Miscanthusaccessions, collected from wide range of geographic regions, were established early in March 2010 in Wuhan, China. The feedstock was sampled for nutrient concentration determination late in November 2010 and 2011 (at physiological maturity), and harvested early in February 2011 and 2012 (after a killing frost) to evaluate the biomass yield, nutrient concentration and removal. Across these two years, the biomass yield was negatively related to the latitude of the original collection sites. A significant increase in biomass production was observed in the second growth year relative to that in the first growth year among almost all of theMiscanthusaccessions. The accessions of MS267 and MS321 only yielded 1.32 and 1.91 ton ha−1in 2010, respectively, but the biomass yield increased dramatically to 11.23 and 22.76 ton ha−1in 2011, leading to greater nutrient removal by the final harvest and thus the requirement of much more fertilizer in the following years. The accessions MS92, MS145, MS262, MS436 and MS438 established poor biomass yields, averaging <1 ton ha−1in the first two years, which suggests that they may be unsuitable for planting in the present environment. Significant differences between accessions were found for the nutrient concentration at maturity and after frost. Notable differences in the nutrient concentration after frost and nutrient removal were presented among theMiscanthusaccessions. In addition, the significant difference conferred the possibility of achieving a desirable cultivar with significant biomass yield and relative nutrient removal by harvest. The accessions MS434, MS461 and MS296 had consistently high biomass yield and relatively low nutrient removal, demonstrating desirable characteristics as a low-input bioenergy crop. The results are important for guiding the agronomical practices of nutrient management and genetic improvement for nutrient-use efficiency to increase biomass production with low fertilizer input.
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DOI：
10.2136/sssabookser3.3ed
发表时间：
1990
期刊：
--
影响因子：
--
作者：
R. Westerman
通讯作者：
R. Westerman
DOI：
--
发表时间：
2013-01
期刊：
--
影响因子：
--
作者：
L. Clark
通讯作者：
L. Clark
影响因子：
2.1
作者：
Adler, Paul R.;Sanderson, Matt A.;Jung, Hans-Joachim G.
通讯作者：
Jung, Hans-Joachim G.
影响因子：
6
作者：
Beale, C. V.;Long, S. P.
通讯作者：
Long, S. P.
影响因子：
1.2
作者：
G. Bélanger;J. E. Richards
通讯作者：
G. Bélanger;J. E. Richards