不同性别贵乾半细毛羊粪便养分及重金属含量测定研究

Study on the Determination of Nutrient and Heavy Metal Content in Feces of Guigan Semi-fine Wool Sheep of Different Genders

为研究贵乾半细毛羊养殖生产中粪污污染现状,试验选择健康的1周岁贵乾半细毛羊10只,分为公羊组和母羊组,每组各5只,分别测定粪便中养分及重金属含量和部分微生物指标。结果表明:公羊粪便中TN、NH_(4)^(+)-N和NO_(3)^(-)-N含量显著高于母羊(P<0.05),但有机物含量二者之间差异不显著(P>0.05);公母羊粪便中砷和镉含量低于检测极限值,公羊粪便中锌含量显著低于母羊(P<0.05),其余指标铜、汞、铅和铬等的含量组间差异不显著(P>0.05);微生物方面,公母羊粪便中均未检出蛔虫卵,公羊粪便中大肠杆菌群数高于母羊,但差异不显著(P>0.05)。可见,公羊和母羊对养分和重金属的消化吸收能力不同,在当前饲养模式下,贵乾半细毛羊养殖生产并未对环境污染产生影响。

To study the current situation of fecal pollution in the breeding and production of Guiqian semi-fine wool sheep,10 healthy 1-year-old Guiqian semi-fine wool sheep were selected for the experiment,divided into a male sheep group and a female sheep group,with 5 sheep in each group.The nutrient and heavy metal content as well as some microbial indicators in the feces were measured.The results showed that the content of TN,NH_(4)^(+)-N,and NO_(3)^(-)-N in ram feces was significantly greater than that in ewes(P<0.05),but the difference in organic matter content between the two was not significant(P>0.05).The content of arsenic and cadmium in the feces of male and female sheep is lower than the detection limit,while the zinc content in the feces of male and female sheep is significantly lower than that of female sheep(P<0.05).The content of other indicators such as copper,mercury,lead,and chromium is not significantly different between groups(P>0.05).In terms of microorganisms,no roundworm eggs were detected in the feces of both male and female sheep,the number of Escherichia coli groups in male sheep feces was higher than that in female sheep,but the difference was not significant(P>0.05).It can be seen that rams and ewes have different digestion and absorption abilities for nutrients and heavy metals.Under the current feeding mode,the production of Guiqian semi-fine wool sheep has not had an impact on environmental pollution.