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首页> 外文期刊>Bioenergy research >Long-Term Miscanthus Yields Influenced by Location, Genotype, Row Distance, Fertilization and Harvest Season
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Long-Term Miscanthus Yields Influenced by Location, Genotype, Row Distance, Fertilization and Harvest Season

机译：位置，基因型，行距，施肥和收获季节对长期芒草产量的影响

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摘要

Long-term yield studies in perennial crops like miscanthus are important to determine mean annual energy yield and the farmer’s economy. In two Danish field trials, annual yield of two miscanthus genotypes was followed over a 20-year period. The trials were established in 1993 on loamy sand in Foulum and on coarse sand in Jyndevad. Effects of genotype, row distance and fertilization were investigated. In both trials, yield development over time was characterized by an increase during the first years, optimum yields after 7–8 years and a decrease to a lower level which remained relatively constant from year 11 to 20. Spring harvest reduced the yield by 34–42 % compared to autumn harvest. In Foulum annual fertilization with 75 kg ha−1 N increased the yield of the genotype Goliath (Miscanthus sinensis) by 26 %. Additional N fertilization only increased the yield of Goliath little, and the genotype Giganteus (Miscanthus × giganteus) did not respond to fertilization at all. The highest mean yield in Foulum for the period 1997–2012 was obtained with the shortest row distance (∼18,000 rather than ∼12,000 plants ha−1) and harvested in late autumn, namely 13.1 and 12.0 Mg ha−1 DM annually for Giganteus and Goliath, respectively. In Jyndevad, where only Goliath was studied, the highest yield during 1995–2001 was obtained by short row distance, autumn harvest and annual fertilization with 75 kg ha−1 N, with yield increasing up to 116 % in response to fertilization. A mean yield of 14.4 Mg ha−1 DM was achieved over the period 1995–2012.
机译：对多年生作物如桔梗的长期单产研究对于确定平均年能源产量和农民经济很重要。在两项丹麦的田间试验中，在20年的期间内，跟踪了两种猕猴基因型的年产量。该试验于1993年在富勒姆（Foulum）的壤质沙和延吉德（Jyndevad）的粗沙上建立。研究了基因型，行距和施肥的影响。在这两个试验中，随着时间的推移，产量的发展都表现为：第一年增加，7-8年后达到最佳产量，并降低到较低水平，从11年到20年保持相对稳定。春季收获使产量减少了34-8％。与秋季收获相比增加了42％在Foulum中使用75 kg ha-1 N的年度施肥使基因型Goliath（Miscanthus sinensis）的产量增加了26％。额外的氮肥施用只会增加巨人的产量，而基因型Giganteus（Miscanthus×giganteus）完全对施肥无反应。以最小的行距（〜18,000而不是〜12,000 ha-1植株）获得了1997-2012年Foulum的最高平均产量，并于深秋收获，分别是Giganteus和Mighaus的13.1和12.0 Mg ha-1 DM。歌利亚，分别。在仅研究巨人的Jyndevad中，通过短行距，秋季收获和75 kg ha-1 N的年度施肥获得1995-2001年期间的最高产量，随着施肥，产量增加高达116％。在1995年至2012年期间，平均产量为14.4 Mg ha-1 DM。

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