Growth, yield and mineral content of Miscanthus x giganteus grown as a biofuel for 14 successive harvests
Growth, yield and mineral content of Miscanthus x giganteus grown as a biofuel for 14 successive harvests
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DOI：
10.1016/j.indcrop.2008.02.009
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发表时间：
2008-11-01
影响因子：
5.9
通讯作者：
Yates, N. E.
中科院分区：
文献类型：
--
作者：
Christian, D. G.;Riche, A. B.;Yates, N. E.
在粉质粘壤土上进行了14年的田间试验。试验设不施氮肥、60 kg/ha/a和120 kg/ha/a三种累积施氮量。在冬季收获作物并测量干物质产量。N对产量无影响。产量在前6年增加，在第7年和第8年下降，但随后再次增加，并在第10年达到最高，所有处理的平均值为17.7 tha（-1）。14年来，最高和最低产量处理之间的总产量差异仅为5%，平均为178.9千公顷（-1），相当于12.8千公顷（-1）年（-1）。在前10次收获中，92%的干物质是茎。虽然研究表明不需要氮肥，但认为每年施用7公斤磷肥和100公斤钾肥将避免土壤储量耗尽。不需要每年使用农药，该作物可被视为低投入，至少可持续14年。(C)2008 Elsevier B. V.保留所有权利。
Miscanthus x giganteus, a perennial rhizomatous grass commercially used as a biofuel crop was grown in a field experiment on a silty clay loam soil for 14 years. There were 3 rates of fertilizer nitrogen (N), none (control), 60 kg N ha(-1) yr(-1) and 120 kgN ha(-1) yr(-1) as cumulative applications. The crop was harvested in winter and dry matter yield measured. N did not influence yield. Yield, which increased for the first 6 years, decreased in years 7 and 8, but then increased again and was highest in the 10th year averaging 17.7 tha(-1) across all treatments. Differences in total production over the 14 years were only 5% between the highest and lowest yielding treatments and averaged 178.9 tha(-1) equivalent to 12.8 tha(-1) yr(-1). In the first 10 harvests, 92% of dry matter was stem. Although the study showed N fertilizer was not required, it is considered that an application of 7 kg P ha(-1) yr(-1) and 100 kg K ha(-1) yr(-1) would avoid soil reserve depletion. Pesticides were not required every year and the crop can be considered as low input with a high level of sustainability for at least 14 years. (C) 2008 Elsevier B.V. All rights reserved.