不同碳氮比培养基质组合对赤子爱胜蚓生长繁殖的影响

在实验室条件下,以不同配比的牛粪和稻秆作为培养基质,研究了赤子爱胜蚓Eisenia foetida在不同碳氮比培养基条件下生物量以及数量变化情况.结果表明:100%牛粪(碳氮比为21.8)和80%牛粪+20%稻秆组合(碳氮比为24.9)堆置30、60、90 d后的蚯蚓生物量显著高于其他处理;60%牛粪+40%稻秆组合(碳氮比为28.7)堆置60和90 d后蚯蚓总数量最多,显著高于其他处理,在第90天达到324条;另外,培养基质的碳氮比与蚯蚓的生物量和数量均呈显著负相关关系(P<0.001).由此可知,碳氮比在21.8～24.9之间的牛粪和稻秆基质组合适宜蚯蚓生长,碳氮比为28.7的牛粪和稻秆基质组合适宜蚯蚓繁殖.

Effects of Vermibeds with Different C/N Ratios on the Growth and Fecundity of Eisenia foetida

Comparative studies were performed to evaluate the growth and fecundity of earthworm,Eisenia foetida,in the combination of cattle manure and rice straw with different C/N ratios under laboratory condition.The observations indicated that the biomass of E.foetida was significantly higher in cattle manure with C/N ratio of 21.8 and 80% cattle manure +20% rice straw with C/N ratio of 24.9 when compared to other treatments at 30,60,90 days.Moreover,the population of worms in 60% cattle manure+40% rice straw,which had a C/N ratio of 28.7,was significantly greater than that of others at 60 or 90 days,and the number of worms increased up to 324 after 90 days.The C/N ratio of vermibeds showed significantly negative relation with earthworm biomass and population.In conclusion,the optimum C/N ratio of cattle manure and rice straw combination is from 21.8 to 24.9 for E.foetida growth,and 28.7 for fecundity.