中国农业科学 ›› 2009, Vol. 42 ›› Issue (6): 2229-2236 .doi: 10.3864/j.issn.0578-1752.2009.06.046

• 研究简报 • 上一篇    下一篇

收获时间对玉米秸秆产量与燃料品质的影响

刘吉利,程 序,谢光辉,熊韶峻,朱万斌

  

  1. (中国农业大学农学与生物技术学院)
  • 收稿日期:2008-09-12 修回日期:2008-12-01 出版日期:2009-06-10 发布日期:2009-06-10
  • 通讯作者: 朱万斌

Effect of Harvesting Period on Yield and Fuel Quality of Corn Stover

LIU Ji-li, CHENG Xu, XIE Guang-hui, XIONG Shao-jun, ZHU Wan-bin   

  1. (中国农业大学农学与生物技术学院)
  • Received:2008-09-12 Revised:2008-12-01 Online:2009-06-10 Published:2009-06-10
  • Contact: ZHU Wan-bin

摘要:

【目的】探明不同收获时间下玉米秸秆产量和燃料品质的变化规律,以确定适宜的收获时间。【方法】于2007-2008年在吉林省白城市农业科学院以郑单958为研究材料,在田间试验条件下研究收获时间对玉米秸秆产量与燃料品质的影响。【结果】随收获时间的推迟,玉米秸秆产量呈下降趋势,且叶片所占比例逐渐降低;秸秆含水量、灰分和矿质元素含量显著降低;纤维素、木质素含量升高,半纤维素含量降低。秸秆热值以灌浆期最高,成熟期最低,其后略有升高;热值与纤维素和木质素含量呈显著正相关关系;灰分与矿质元素含量呈显著正相关关系,与Si/K比值呈显著负相关关系。【结论】延迟收获虽然降低了玉米秸秆的产量,却显著提高了其燃料品质,冬季至春季收获秸秆品质较好。

关键词: 玉米秸秆, 收获时间, 生物能源, 燃料品质

Abstract:

【Objective】 The objective of this experiment is to evaluate the variation in yield and fuel quality of corn stover under different harvesting periods and to determine appropriate harvesting periods. 【Method】 Using Zhengdan 958 as research material, the effect of harvesting periods on yield and fuel quality of corn stover was studied under field conditions in Baicheng Academy of Agricultural Sciences during 2007-2008. 【Result】 Results showed that with the delayed harvesting period, yield of corn stover decreased, and the proportion of leaves reduced gradually. Moisture, ash, and mineral elements contents of corn stover significantly decreased, cellulose and lignin contents increased, but hemicellulose content decreased. Calorific value of corn stover was maximum at filling stage and minimum at maturity, it was slightly higher after maturity. Calorific value was significantly correlated with cellulose and lignin contents. Ash content was significantly positively correlated with mineral elements contents, and was significantly negatively correlated with Si/K ratio. 【Conclusion】 Delayed harvesting reduced the yield of corn stover, but significantly improved its fuel quality. Corn stover fuel quality was better when harvested in winter and spring.

Key words: corn stover, harvesting period, bioenergy, fuel quality