Straw yield and saccharification potential for ethanol in cereal species and wheat cultivars
Straw yield and saccharification potential for ethanol in cereal species and wheat cultivars
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DOI：
10.1016/j.biombioe.2012.06.012
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发表时间：
2012-10-01
影响因子：
6
通讯作者：
Lindedam, Jane
中科院分区：
文献类型：
--
作者：
Larsen, Soren Ugilt;Bruun, Sander;Lindedam, Jane
秸秆是谷物生产的副产品，它构成了相当大的生物质资源，例如用于生产2G乙醇。每公顷秸秆产量和秸秆乙醇产量的质量都是影响可利用生物质资源和每公顷潜在乙醇产量的重要因素。在2009年三个地点的一系列田间试验中，我们比较了冬季谷物品种小黑麦、冬大麦、冬黑麦和冬小麦的秸秆和粮食产量。籽粒产量在不同品种间差异不显著，但冬黑麦的秸秆干物质产量比其他品种高59%。葡萄糖和木糖在预处理和酶解后的释放量即糖化电位被用来指示乙醇生产的潜力。不同品种间糖化潜力没有差异，但由于秸秆产量的差异，冬季黑麦的面积糖化潜力（即每公顷潜在糖产量）比其他品种高29% ~ 78%。在2008年2个地点和2009年3个地点的冬小麦品种系列试验中，不同品种间的秸秆产量在年内和年内均存在显著差异。即使在籽粒产量无显著差异的品种中，最高产量品种在两年内的秸秆产量分别比最低产量品种多57%和37%。对2009年收获的冬小麦品种试验秸秆进行了糖化电位测定。栽培品种和地理位置对其潜力的影响不显著，但差异较大。然而，由于秸秆产量的品种差异，不同品种间的面积糖化潜力差异显著，葡萄糖产量差异高达38%，木糖产量差异高达35%。秸秆产量随籽粒产量的增加而增加，但秸秆粒比在不同品种间差异显著，在不同年份和不同地点间不一致。这对基于谷物产量和秸秆产量之间关系的秸秆资源估计有影响。总之，在不影响粮食产量的情况下，选择秸秆产量更高的品种和栽培品种似乎是可能的，因此每公顷乙醇产量的潜力更大。只要增加的秸秆产量不伴有倒伏倾向增加等负面影响，这可能提供一种增加总体秸秆资源的手段。(c) 2012 Elsevier Ltd.版权所有。
Straw is a by-product from cereal production which constitutes a considerable biomass resource, for instance for 2G ethanol production. Straw yield per hectare and straw quality in terms of ethanol production are both important factors for the available biomass resource and the potential ethanol production per hectare. In a series of field trials on three locations in 2009, we compared straw and grain yield from the winter cereal species triticale, winter barley, winter rye, and winter wheat. Grain yield did not differ significantly between the species, but winter rye yielded up to 59% more straw dry matter than the other species. The release of glucose and xylose after pretreatment and enzymatic hydrolysis i.e. the saccharification potential was used to indicate the potential for ethanol production. The saccharification potential did not differ between species, but due to the differences in straw yield, areal saccharification potential (i.e. potential sugar production per hectare) was from 29% to 78% higher for winter rye than for other species. In a series of winter wheat cultivar trials on two locations in 2008 and three locations in 2009, straw yield differed significantly between cultivars in both years and across years. The highest yielding cultivar yielded up to 57% and 37% more straw than the lowest yielding cultivar in the two years, respectively, even among cultivars with non-significant differences in grain yield. The saccharification potential was measured from straw of winter wheat cultivar trials harvested in 2009. The potential varied largely but was not significantly affected by neither cultivar nor location. Due to cultivar differences in straw yield, however, areal saccharification potential differed significantly between cultivars with up to 38% difference in glucose yield and up to 35% in xylose yield. Straw yield increased with increasing grain yield, but the straw:grain ratio differed significantly between cultivars and was not consistent across years and locations. This has implications for straw resource estimates when these are based on the relationship between grain yield and straw yield. In conclusion, it appears possible to choose species and cultivars with higher straw yield and consequently larger potential for ethanol production per hectare without compromising grain yield. This may provide a means of increasing the overall straw resource, as long as increased straw yield is not accompanied by negative effects such as increased tendency to lodging. (c) 2012 Elsevier Ltd. All rights reserved.