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Cool-Season Grass Biomass in the Southern Mixed-Grass Prairie Region of the USA

机译：美国南部混合草草原地区的冷季草生物量

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Emphasis is trending toward future bioenergy production being derived from cellulosic materials rather than starch from seed crops. The majority of research on perennial biomass production for conversion to ethanol or other biofuel has used warm-season grasses as the feedstock material. Some cool-season grasses also have great potential for biomass production, even in the southern prairie region. A study was conducted for 4 years to evaluate the dry matter production potential of several cool-season grass cultivars in west-central Kansas. Ten cultivars were grown at two locations, one an upland soil and the other a lowland soil, and harvested in late June from 2007 to 2010 when fully headed with mature seed. Three cultivars, one tall [Thinopyrum ponticum (Podp.) Barkw. & D.R. Dewey], intermediate [T. intermedium (Host) Barkw. & D.R. Dewey], and western wheatgrass [Pascopyrum smithii (Rydb.) Love], had the greatest biomass production with 4,525–4,840 kg ha−1 dry matter averaged over four years at an upland location. At a lowland location, three cultivars, either intermediate or tall wheatgrasses, averaged 5,340–5,490 kg ha−1 dry matter over the 4 years. During the particularly moist spring of 2007, three cultivars at the upland location and eight cultivars at the lowland location produced over 9,000 kg ha−1 dry matter. All cultivars increased in plant stand frequency from 2006 to 2011, except for the western wheatgrass and Russian wildrye [Psathyrostachys juncea (Fisch.) Nevski] cultivars that already had a high frequency before the first biomass harvest. These grasses may add versatility to production systems by not only serving as complementary forage for grazing or hay, but also by providing an alternative feedstock for cellulosic ethanol and combustion energy production.
机译：人们越来越倾向于从纤维素材料而不是种子农作物获得淀粉来生产未来的生物能源。多年生生物质生产转化为乙醇或其他生物燃料的大多数研究都使用暖季草作为原料。即使在南部草原地区，一些凉季草也具有巨大的生物量生产潜力。进行了为期4年的研究，评估了堪萨斯中西部几个凉季草品种的干物质生产潜力。 10个品种在两个地点生长，一个地点是旱地土壤，另一个地点是低地土壤，并于2007年6月下旬至2010年收获，当时完全成熟。三个品种，一个高大[Thinopyrum ponticum（Podp。）Barkw。 ＆D.R.杜威]，中级[T.中介（主持人）Barkw。 ＆D.R.杜威]和西部小麦草[Pascopyrum smithii（Rydb。）Love]，在高地地区，四年内平均产生的生物量最大，为4,525–4,840 kg ha-1干物质。在低地位置，三年间中高小麦草三个品种平均4,340-5,490千克ha-1干物质。在特别潮湿的2007年春季，高地的三个品种和低地的八个品种生产了超过9,000千克ha-1的干物质。从2006年到2011年，除西部小麦草和俄罗斯野生黑麦（Psathyrostachys juncea（Fisch。）Nevski）品种外，所有品种的林分频率都增加了，在第一次生物量收获之前已经有较高的频率。这些草不仅可以用作放牧或干草的补充草料，而且还可以为纤维素乙醇和燃烧能的生产提供替代原料，从而为生产系统增加多功能性。

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