Decomposition of sawdust and bark treated with cellulose-decomposing microorganisms

Summary The decomposition of coniferous sawdust and bark with added N and P was studied in relation to its capacity to serve as a substrate for plant growth. With sawdust as a substrate, there was more microbial biomass, greater CO₂ evolution, more ammonification and more actinomycetes but less nitrification and less fungi compared with bark. All groups and activities were greater in sawdust and bark compared with soil used as the substrate. Inoculation with cellulolytic strains of Bacillus sp. Cephalosporium sp. and Streptomyces sp. sometimes increased these activities but only marginally. The derived sawdust and bark composts increased the yields of tomato compared with soil to which the same nutrients had been added.     

菌种和辅料对鸡粪堆肥效果的影响（英文）

[目的]探讨菌种和辅料对鸡粪堆肥效果的影响。[方法]试验以鸡粪和木屑稻壳为发酵原料,分别添加酵母菌和乳酸菌,研究菌种和辅料对鸡粪发酵过程中温度大肠杆菌群数和臭味的变化。[结果]1添加酵母菌组的发酵最高温度达到67.6℃,比乳酸菌组高6.9℃,且酵母组发酵温度在5℃以上持续了16 d,比乳酸菌组多5 d,两组均高于对照组(59℃和5 d);2添加木屑组的发酵最高温度比稻壳组高2.2℃,5℃以上的持续时间多3天;3酵母菌组、乳酸菌组的粪中大肠杆菌的数量由105个/g德下降到102个/g,其粪臭味分别在第7天和第8天消失。[结论]在该试验条件下,在鸡粪中添加酵母菌和木屑的堆肥发酵效果是最好的。     

锯末对生物修复荧蒽和芘污染土壤的强化作用及影响因素

通过土壤微宇宙培养试验,研究了锯末尺寸、添加量和种类等因素对荧蒽特效降解菌MC(Mycobacterium flavescens)修复污染土壤(潮土、红壤、黑土、黄棕壤和水稻土)的效果.结果表明:锯末联合降解菌MC修复荧蒽污染的黄棕壤效果较好,优化条件下25 d荧蒽降解率为42.63％ ±1.05％;该联合修复对黑土和...