摘要
[目的]研究玉米秸秆的物理力学性能,可为研制低能耗、高效率的秸秆收获及加工设备提供不可或缺的基本技术参数,减少成本、缩短研发周期。[方法]利用万能试验机,测试了不同收获期玉米秸秆的剪切力性能,并分析刀具的刃角、剪切速度、取样位置等因素对剪切力的影响。[结果]各因素对试验指标(最大剪切力)的影响按大小次序是取样位置→收获期→刀刃角→剪切速度。刀刃角越小,剪切力越小,越省力;剪切力随着剪切速度的提高呈下降趋势;根部秸秆剪切力稍微大于中部,上部秸秆的剪切力明显小于其他2个部位。[结论]随着玉米收获期的延迟,秸秆的纤维素和木质素含量增加,对应的剪切力增大,作为饲料适口性变差,所以应该在玉米成熟后尽早收获秸秆并进行加工处理。
[ Objective ] Study on mechanical properties of maize stalk can provide principal technical data for developing stalk harvesting and processing equipment of low-energy and high efficiency. [ Method] Shearing force of maize stalk at different harvest time was tested with uni- versal material machine, and influence of blade angle, cutting speed, sample position on shearing force were analyzed. [ Result] The results showed that influent order of the factors on test index（maximum sheafing force） was sample position→harvest time→blade angle→cutting speed. Shearing force decreased with decreasing of blade angle; decreased with improving of cutting speed; shearing force of root stalk was slightly larger than that of middle stalk, and shearing force of top stalk was obviously lesser than that of other positions. [ Conclusion] With de- laying of harvest time, lignin and cellulose content of stalk increased, corresponding sheafing force increased, feed palatability decreased, so maize stalk should be earlv harvested and nrocessed.
出处
《安徽农业科学》
CAS
2013年第21期9133-9135,共3页
Journal of Anhui Agricultural Sciences
基金
吉林省教育厅项目(2010第43号)
科技部科技人员服务企业行动项目(2009GJB0008)
关键词
玉米秸秆
剪切力
收获期
Maize stalk
Shearing force
Harvest time
