刘割间隔对王草农艺性状和纤维素乙醇生产的影响

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中图分类号：S543.9 文献标识码：A 文章编号：1007-0435（2025）07-2407-06

doi：10.11733/j.issn.1007-0435.2025.07.035

引用格式：，等.刈割间隔对王草农艺性状和纤维素乙醇生产的影响[J].草地学报，2025，33（7）：2407一 2412 GUO Xiang，ZHANG Teng-fei，TIAN Jing，et al.Effects of Cuting Intervals on Agronomic Traits and Cellulosic Ethanol Production of King Grass[J].Acta Agrestia Sinica，2025，33（7） ：2407-2412

Effects of Cutting Intervals on Agronomic Traits and Cellulosic Ethanol Production of King Grass

GUO Xiang，ZHANG Teng-fei，TIAN Jing，ZHANG Jian-guo* （ColegeoforestryandLandscaperchitectureouthinaAgriculturalUniversityuangzhouangdongProvince64ina）

Abstract： In order to improve the yield and ethanol production capacity of‘Reyan No.4’ king grass（Pennisetum purpureum ×P . americanum cv. ‘Reyan No. ），the optimum cutting intervals were studied. In this paper，king grass was used as the experimental material to studythe effects of different cuting intervals （2，3， 4，6 and l2 months）on agronomic traits and celulosic ethanol production.The results showed that the total yields of fresh matter （FM），dry matter（DM），and ethanol of king grassat the 6-month cutting interval was significantly higher than those at other cutting intervals ⋅P<0.05 ），reached 328.29t⋅hm-2FN I， 86.08t⋅hm-2 DM，and 15.18t⋅hm-2 ，respectively. The longer the cutting interval， the larger the dry matter rate，average plant height and stem diameter，the more the cellulose，hemicellulose，and lignin content，while the average tillering number，ash content，adsorbed water content，lignin removal rate，dry base weight loss rate of enzymatic hydrolysis，enzymatic hydrolysis rate，ethanol concentration，and ethanol conversionrate decreased gradually. In summary，the yields of king grassand ethanol with a6-month cuting interval were the best，which provides a reference for the industrial application of king grass in producing cellulosic ethanol.

Key words：King grass;Cutting intervals;Agronomic traits;Cellulosic ethanol

随着全球人口增长，粮食和能源日益短缺，利用植物秸秆生产燃料乙醇成为了缓解粮食危机、能源危机及环境问题的有效策略之一[1-3]。（剩余9608字）