摘要
设置小麦秸秆和奶牛场废弃物联合堆肥试验,以评估其消纳养殖废水与制作商品有机肥的可行性。试验用麦秸分别与沼渣、沼液、牛粪、粪水混合堆肥,以小麦秸秆并用尿素调节碳氮比为35∶1的处理为对照。结果表明,各处理堆体温度50℃以上持续时间分别为30 d、17 d、41 d、12 d和24 d,均已符合堆肥卫生标准要求的高温天数;堆肥过程中麦秸分别与沼渣、沼液、牛粪、粪水混合堆肥及对照的有机碳含量分别下降了14.00%、5.50%、15.80%、4.45%和10.70%;堆肥过程各处理氮、磷、钾含量逐渐增加。堆肥结束时,各处理有机质含量介于590.28 g/kg与701.86 g/kg之间;氮磷钾总养分含量介于46.54 g/kg与89.45 g/kg之间,其中麦秸与牛粪混合堆肥处理总养分含量最高(89.45 g/kg),麦秸与沼渣混合堆肥处理次之(69.61 g/kg)。秸秆与牛粪或沼渣混合堆肥时高温时间较长,且堆肥产物养分含量高;用麦秸和养殖废水(沼液或牛粪水)混合堆肥,每处理1.0 t麦秸可消纳废水1.8 t,有利于奶牛场节本增效。
An experiment was conducted to investigate the feasibility of co-composting of wheat straw and dairy waste.Wheat straw was co-composting with biogas residues,biogas slurry,dairy manure,and dairy slurry,respectively,and pure wheat straw composting was regarded as control,in which C/N ratio was regulated to 35∶1 using urea.The results indicated that the high temperature durations above 50 ℃ for five composts were 30 d,17 d,41 d,12 d and 24 d,respectively,which reached the sanitary standard of aerobic composting.The organic carbon contents of five composts decreased by 14.00%,5.50%,15.80%,4.45% and 10.70% at the end of experiment,respectively.The contents of nitrogen,phosphorus and potassium increased gradually during composting.At the end of composting,the organic matter content was 590.28-701.86 g/kg.The total nutrient content（N＋P2O5＋K2O） was 46.54-89.45 g/kg.Among five treatments,total nutrients in the co-compost of straw and dairy manure was the highest（89.45 g/kg）,followed by co-compost of wheat straw and biogas residues（69.61g/kg）.Given long high-temperature duration and high total content of nitrogen,phosphorus and potassium,co-composting of wheat straw and dairy manure or biogas residues is suitable in practical application.But it is economical for the co-composting of wheat straw and biogas slurry or dairy slurry,because of high ratio of 1.8 t biogas slurry or dairy slurry to 1.0 t wheat straw.
出处
《江苏农业学报》
CSCD
北大核心
2012年第1期65-71,共7页
Jiangsu Journal of Agricultural Sciences
基金
公益性行业(农业)科研专项(200903011-01)
江苏省农业科技自主创新基金项目[CX(09)622]
关键词
麦秸
奶牛场废弃物
堆肥
wheat straw
dairy waste
composting
