Abstract: Objective To observe the treatment results and the quantitative change of 3 MI,COD and BOD₅ in the pig manures after housefly larvae treated. Methods About 4 000 housefly adults were random selected. Their eggs laid in height period of oviposition incubated in pig manure. Housefly larvae and surplus manure were weighted after one week of the treatment manure,and change of the number of colibacillary colony was observed. The contents of 3-MI,COD,BOD₅and NH ₃-N were detected in treated and non treated pig manure. Results The weight of the pig manure averagely decreased to 53.73%54.83% of untreated manure,weight of larvae is 10.49%-11.34% of the pig manure. The colibacillarg colong in manure treated per grom was 99.96% less than that untrented. The contents of 3-MI,COD and BOD ₅ in the treated pig manure were 92.80% ,54.20% and 75.30% than those in untreated manure,respectively. The variation was significant (P<0.01). But the content of NH ₃ N decreased 6.30% only with out significant variation(P> 0.05). Conclusion These results showed that it is possible of reduce discharge of manure and the contents of 3 MI,COD and BOD in the pig manure. To reduce the environment pollution of pig manure by treating pig manure with housefly larvae.

摘要： 目的 观察家蝇幼虫(蝇蛆)处理猪粪的效果和猪粪中粪臭素和排污量的变化。方法随机挑选约4000只蛹孵化成蝇,取产卵高峰期所产的卵,置于猪粪内孵化饲养,1周后计算出得蛆量、剩余粪量和处理前后粪内大肠菌群数的变化,并检测两组猪粪样本中粪臭素(3-甲基吲哚,3-MI)、化学需氧量(COD)、生化需氧量(BOD₅)和氨氮(NH3N)的含量。结果平均得蛆量为粪量的10.49%～11.34%,粪量平均减少到处理前粪量的53.73%～54.83%;每克粪大肠菌群数减少99.96%。经蝇蛆处理后猪粪中的3-MI、COD和BOD5分别减少92.80%、5417%和75.30%,有显著性变化(P<0.01);NH3N的含量仅减少6.30%,无明显变化(P>0.05)。结论家蝇蛆生态处理猪粪,可减少粪的排放量和粪中的大肠埃希菌,也可有效地减少粪臭素和有机污染,有利于改善环境。

关键词: 家蝇幼虫, 猪粪, 大肠埃希菌, 粪臭素, 化学需氧量, 生化需氧量