%0 Journal Article
%T Acute toxicological effects of excessive Cu and Zn-containing in pig manure on earthworm<br>高铜、高锌猪粪对蚯蚓的急性毒性效应研究
%A JIA Xiuying
%A Luo Ancheng
%A LI Ximei
%A <br>贾秀英
%A 罗安程
%A 李喜梅
%J 应用生态学报
%D 2005
%I 
%X Cu and Zn are popularly used as additives in animal feed in China,which could result in their excessive accumulation in manure to a toxic level,and thus,possibly threaten the environment when the manure is applied to farmland.In this paper,the acute and sub-acute lethal effects of pig manure with excessive Cu and Zn on earthworm were studied,and the results indicated that the concentration of Cu and Zn in pig manure had a significantly positive correlation with the mortality of earthworm,while a significantly negative correlation with earthworm growth rate.The individuals of earthworm had different tolerance to excessive Cu and Zn,with the threshold values causing death being 250 mgkg~(-1) and 400 mgkg~(-1)for Cu and Zn,respectively.The LD_(50) was 646.68 mgkg~(-1) for Cu,and 947.38 mgkg~(-1) for Zn.A strong synergistic effect was observed under the combined pollution of 250 mgkg~(-1) for Cu and 500 mgkg~(-1) for Zn,whereas antagonistic effect happened when 750 mgkg~(-1) for Cu was supplied,suggesting that the joint toxic effects of Cu and Zn on earthworm were closely correlated to their concentrations in pig manure.
%K Pig manure
%K Heavy metal
%K Earthworm
%K Acute toxicity<br>猪粪
%K 重金属
%K 蚯蚓
%K 急性毒性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=DE127E7A7CA51867&yid=2DD7160C83D0ACED&vid=7801E6FC5AE9020C&iid=5D311CA918CA9A03&sid=599BE0AAD31F648B&eid=142CA2F7BF1B30ED&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=6&reference_num=20