不同碳氮比肥料组合对肥料氮生物固定、释放及小麦生长的影响  

Effects of different C/N combinations of fertilizers on nitrogen biological fixation and release of fertilizer and wheat growth

作　　者：唐玉霞[1] 孟春香[1] 贾树龙[1] 王惠敏[1] 刘巧玲[1] 

机构地区：[1]河北省农林科学院农业资源环境研究所,石家庄050051

出　　处：《中国生态农业学报》2007年第2期37-40,共4页Chinese Journal of Eco-Agriculture

摘　　要：采用室内模拟试验与盆栽试验相结合的方法,研究了不同C、N比肥料组合(玉米秸秆+尿素)对肥料N生物固定、释放及小麦生长的影响。结果表明:肥料组合的C、N比越高,土壤微生物对肥料N的固定量越大。但其释放率逐渐降低;肥料组合的C、N比越高,对土壤NO3--N的抑制作用越大;麦田玉米秸秆还田时,调整其C／N≤20为宜。The incubation experiment and pot experiment were conducted to study the effects of different C/N combina- tions of fertilizers（corn straw ＋ urea）on nitrogen biological fixation and release of fertilizer and wheat growth. The results show that the biological nitrogen fixation is improved with the increase of C/N ratio. But the releasing rate of microbial biomass nitrogen decreases gradually. With the increase of C/N ratio of fertilizer combination, the restraint to nitrate nitrogen in soil becomes stronger. When corn straw is applied to wheat field, the C/N≤20 is suitable for the growth of wheat.

关 键 词：C、N比 微生物量氮 生物固定 小麦生长 

分 类 号：S633.406.2[农业科学—蔬菜学]