Switchgrass biomass partitioning and growth characteristics under different management practices
Switchgrass biomass partitioning and growth characteristics under different management practices
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DOI：
10.1016/j.njas.2016.03.011
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发表时间：
2016-09-01
影响因子：
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通讯作者：
Danalatos, N. G.
中科院分区：
文献类型：
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作者：
Giannoulis, K. D.;Karyotis, T.;Danalatos, N. G.
生物量干物质分配和生长特性是能源作物选择的重要指标。本研究的目的是检查响应柳枝稷（CV。2011年和2012年两个生长季节，在两种不同的土壤气候条件下，将Alamo）进行灌溉（2个水平：灌溉和灌溉250 mm）和施氮（4个水平：0，80，160和240 kg N ha（-1））。结果表明，灌溉、施肥及其交互作用对作物生长和生物量生产力有显著影响（P < 0.05）。生物量产量范围为14至27兆公顷（-1）的石灰质，粘壤土到粘土，肥沃的土壤（Velestino;希腊）和深，石灰质桑迪壤土到壤土，半肥沃的土壤（Palamas;希腊），分别。在这两个网站，柳枝稷积累了大量的生物量在茎。干茎/总生物量比率在第3个生长年稳定，在整个生长期内相当恒定（范围为68-71%）。两个地点的最大生长速率相似，值为390 kg ha（-1）day（-1），而观察到的最高叶面积指数为7.59，表明柳枝稷具有独立于地点及其小气候的高生长速率。因此，柳枝稷应包括在未来的种植系统作为一个重要的能源作物的固体生物燃料生产。(C)2016年皇家荷兰农业科学学会。Elsevier B. V.出版，保留所有权利。
Biomass dry matter partitioning and growth characteristics are important selection criteria for energy crops. The objective of the study was to examine the response of switchgrass (cv. Alamo) to irrigation (2 levels: rainfed and irrigated with 250 mm) and N-fertilization (4 levels: 0, 80, 160 and 240 kg N ha(-1)) under two different soil-climatic conditions for two growing seasons 2011 and 2012. The results demonstrated a significant effect (P < 0.05) of irrigation, fertilization and their interaction on crop growth and biomass productivity. Biomass yield ranged from 14 to 27 Mg ha(-1) for the calcareous, clay loam to clay, fertile soil (Velestino; Greece) and for the deep, calcareous sandy loam to loam, semi-fertile soil (Palamas; Greece), respectively. In both sites, switchgrass accumulated a high amount of biomass in stems. Dry stem/total biomass ratio was stabilized in the 3rd growing year and it was rather constant throughout the growing period (range 68-71%). The maximum growth rates were similar for both sites with value of 390 kg ha(-1) day(-1), whereas the highest leaf area index observed was 7.59, indicating that switchgrass has high growth rate independently of the site and its microclimate. Therefore switchgrass should be included in future cropping systems as an important energy crop for solid bio-fuel production. (C) 2016 Royal Netherlands Society for Agricultural Sciences. Published by Elsevier B.V. All rights reserved.