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利用新疆干旱地区4个甜高粱常用品种(杂交种早熟1号和醇甜2号,常规种丽欧和绿能3号)研究其在2个氮素水平下(N0∶0kg/hm2 N和N150∶150kg/hm2 N)全生育期不同碳水化合物含量和产量的变化规律,用以了解品种和氮肥对甜高粱碳水化合物产量的影响,并评估这4个品种在新疆干旱地区生产乙醇的潜力。研究结果表明,随着生育进程的推进,全株可溶性碳水化合物的含量和产量,纤维素、半纤维素的产量都呈现增加趋势,而全生育期半纤维素的含量较稳定。不同的甜高粱品种全株碳水化合物的含量和产量有显著差异,杂交种早熟1号和醇甜2号全株可溶性碳水化合物的产量显著(P<0.05)高于常规种丽欧和绿能3号。品种间不同器官碳水化合物产量所占比重也不同,杂交种早熟1号和醇甜2号的可溶性碳水化合物主要分布在籽粒,而常规种丽欧和绿能3号的可溶性碳水化合物主要分布在茎。乙醇产量潜力分析表明,乙醇产量主要来源于可溶性碳水化合物;杂交种早熟1号和醇甜2号的总理论乙醇产量(分别为10 148和9 982L/hm2)显著(P<0.05)高于常规种丽欧和绿能3号的总理论乙醇产量(分别为9 017和8 728L/hm2)。氮肥的施用并不能显著(P<0.001)增加甜高粱全株可溶性碳水化合物的产量,但能显著(P<0.001)增加全株纤维素、半纤维素理论乙醇产量。
Four sweet sorghum cultivars (hybrids precocious No.1 and sweet-tween2, conventional cultivars Liou and Nongnong3) were used to study the effects of 2 nitrogen levels (N0: 0kg / hm2 N and N150 : 150kg / hm2 N) during the whole growth period to understand the effect of variety and nitrogen fertilizer on the yield of sweet sorghum carbohydrate, and to evaluate the potential of these four varieties to produce ethanol in arid areas of Xinjiang. The results showed that with the progress of fertility, the whole plant soluble carbohydrate content and yield, cellulose and hemicellulose production showed an increasing trend, while the whole growth stage hemicellulose content is more stable. There were significant differences in whole-plant carbohydrate content and yield among different varieties of sweet sorghum. The yield of soluble carbohydrates in hybrids of early maturity 1 and alcoholic sweet 2 was significantly higher (P <0.05) than that of the conventional species Leo and Green Energy 3 number. The proportions of carbohydrates in different organs of different cultivars were also different. The soluble carbohydrates of hybrids of early maturity 1 and alcohol sweet 2 were mainly distributed in kernels, whereas the soluble carbohydrates of conventional plants Liou and Nongnong 3 were mainly distributed in stems . Ethanol production potential analysis showed that the ethanol production mainly came from soluble carbohydrates; the total theoretical ethanol production (10 148 and 9 982 L / hm2) of hybrids of early maturity 1 and alcohol sweet 2 was significantly (P <0.05) higher than conventional The total theoretical ethanol production of Lio and LvNo 3 (9 017 and 8 728 L / hm 2, respectively). Application of nitrogen fertilizer did not significantly (P <0.001) increase sweet sorghum whole plant soluble carbohydrate production but significantly (P <0.001) increased whole-plant cellulose, hemicellulose theoretical ethanol production.