摘要
2011年7月至10月,在江苏省农业科学院六合动物科学基地猪发酵床养殖场,选择两种不同垫料,一栋使用已饲养2批猪的木屑与稻壳并按比例添加部分木屑与稻壳为垫料,一栋以发酵猪粪、果树枝、菌糠及中药渣为主并配以少部分木屑为垫料,监测在育肥猪一个生长周期不同垫料内重金属Cu、Zn、As、Cr等的积累变化情况。结果表明,在一个养殖周期内,不同垫料内重金属元素As、Zn、Cr、Cu含量随时间增加而显著增加,Cu、Zn、Cr等元素在不同垫料内的积累差异显著;经过约一个养殖周期,发酵猪粪、果树枝、菌糠、中药渣垫料内As、Zn、Cu元素含量由浅层(0～20cm)到深层(20～40、40～60cm)呈降低趋势。以发酵猪粪为主的垫料内重金属元素含量均显著高于果树枝、菌糠、中药渣成分为主的垫料,其他材料为主的垫料对垫料内重金属元素积累影响则不明显。
The bio-bed pig raising system,by making deep littering with sawdust,rice hull and other cropping by-products,and also environment friendly microorganisms,helps to compost pig excreta within the bedding.The purpose of the study is to investigate accumulated characteristics of heavy metals including Cu,Zn,As and Cr in different litter in one growth period of fattening pigs.The experiment was conducted in pig bio-bed farms of Luhe animal science base,Jiangsu Academy of Agricultural Sciences from July 2011 to October 2011.The spent litter was collected from four different pens in which the sawdust and rice husk mixture were used as litter and 2 batches of pigs had been feeding.Another spent litter was collected from the other four different pens which fermented pig manure,branches of fruit trees,waste of mushroom cultivation and residue of traditional Chinese medicine were used as litter,in which pigs had not been fed.The results showed that the content of heavy metals of As,Zn,Cr and Cu in litter increased significantly（P0.05） the use time of litter prolonged.The accumulation content of Cu,Zn and Cr in the different litter differed significantly（P0.05）.The accumulation content of As,Zn and Cu of fermented pig manure,branches of fruit trees,waste of mushroom cultivation in turn reduced from the upper shallow layer（0～20 cm） to the lower deep layer（20～40 cm and/or 40～60 cm）.The accumulation content of heavy metals in fermented pig manure litter was higher significantly than that in branches of fruit trees,waste of mushroom cultivation and residue of traditional Chinese medicine litters,while branches of fruit trees,waste of mushroom cultivation,residue of traditional Chinese medicine,sawdust and rice husk had not significantly effect on the accumulation of heavy metals in litter.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2013年第1期166-171,共6页
Journal of Agro-Environment Science
基金
江苏省农业科技自主创新基金项目(CX(12)1001)
关键词
猪发酵床
垫料
重金属
积累
pig bio-bed
bio-bed material
heavy metal
accumulation
