秸秆循环利用与土壤碳循环关系  

Relevance to Straw Cycle and Soil Carbon Cycle

作　　者：宋翠银[1] 孔秋婵[1] 马文凯[1] 梁玉祥[1] 

机构地区：[1]四川大学化工学院,四川成都610065

出　　处：《安徽农业科学》2013年第5期2040-2043,共4页Journal of Anhui Agricultural Sciences

摘　　要：[目的]为了研究秸秆还田过程中在不同的外界环境下碳的转化形式。[方法]通过控制土壤湿度、还田方式、秸秆还田量、培养天数等影响因素,测定土壤中微生物呼吸产生的CO2、土壤有机质、还田率及损失率,来衡量还田的效果。[结果]在人为控制外界条件下,秸秆中的碳更多地转化为有机质,同时减少温室气体中碳的转化。[结论]在土壤湿度45%、粉碎还田、还田量67%、培养天数20 d的条件下,还田效果最佳。[Objective] The research aimed to study the presence form of carbon in straw returning process under different environments.[Method] Through controlling factors such as soil moisture content,ways of returning,returning amount and time duration,the soil microbial producing carbon dioxide through respiration,the soil carbon,returning rate and loss rate were determined.[Result] By controlling the external conditions artificially,the carbon in returned straw was converted more to the organic form than greenhouse gas which was also from the straw carbon.[Conclusion] The returning effect was optimized under the condition of moisture content of 45% and total straw crush of 67% returned to soil for 20 days.

关 键 词：秸秆还田 土壤有机质 呼吸量 还田率 损失率 

分 类 号：S216.2[农业科学—农业机械化工程]