摘要
本研究利用新型复合菌种制备发酵床进行生长猪饲养试验,在对比不同菌种发酵床养猪饲料矿物质元素消化率基础上,对垫料N、P含量及重金属元素含量变化进行测定分析,旨在为发酵床养猪废弃垫料能否作为肥料用于种植业提供理论依据。研究结果表明,无论是生长期矿物质元素的表观消化率,还是育肥期矿物质元素的表观消化率,各个试验组之间均无显著差异(P>0.05)。随着饲养天数的延长,垫料中N、P、Cu、Zn含量及重金属As、Pb的含量逐渐增加,饲养3个周期后,垫料中N、P含量分别为2.28%、1.65%左右,Cu、Zn富集量分别达到266mg/kg、93.3mg/kg,重金属元素As、Pb富集量分别达到2.86mg/kg、0.92mg/kg;饲养过程中Cu元素的富集量要明显高于Zn元素的富集量,砷元素的富集量要明显高于铅元素的富集量。各个试验组间N、P、Cu、Zn含量及重金属As、Pb的含量变化没有显著差异(P>0.05)。结果提示,发酵床生态养猪废弃垫料中N、P含量较高,适合于种植业肥料,但矿物质元素Cu、Zn及重金属元素As、Pb的富集量较高,其肥效有待进一步验证。
In order to provide theoretical premise for the feasibility of the abandoned litters to be used in the future as fertilizers for farm land, in this study, the feeding experiments in pigs were conducted using the pad obtained from the farm sub products fermented with the combined probiotics. The contents of N, P, Cu, Zn and heavy metal elements of litters were analyzed based on comparing the digestibility of the mineral substances in these deep-litter fermentation systems using different probiotics. The results showed that the apparent digestibilities were not significantly different among these groups （P〉0.05） during the growing and fattening stage. However, with the prolonged experimental dates, the contents of N, P, Cu, Zn and heavy metal elements including As and Pb in the litters increased gradually. After 3 weeks,the contents of N and P were about 2. 28% and 1.65%, respectively. The enrichment amount of Cu, Zn, As and Pb were 266,93.3,2.86 and 0. 92 mg/kg, respectively. During the feeding period, the enrichment amount of Cu was obviously higher than that of Zn and the enrichment amount of As was significantly higher than that of Pb. The contents of N, P, Cu, Zn, As and Pb among the different experimental groups were no significantly different （P〉0. 05）. In addition, the contents of N and P in the abandoned litters from the deep-litter fermentation systems were relatively higher, which could be used in the farmland. Unfortunately, the enrichment amount of mineral substances （including Cu,Zn） and heavy metal （including As,Pb） were also higher. Thus, the fertilizer efficiency and feasibility of the abandoned litters from the deep-litter fermentation systems for future use will be further investigated.
出处
《上海交通大学学报（农业科学版）》
2013年第4期23-29,共7页
Journal of Shanghai Jiaotong University(Agricultural Science)
基金
农业部公益性行业(农业)科研专项(200903056)
上海市科技兴农攻关项目[沪农科攻字(2009)第5-1号]
关键词
发酵床
垫料
重金属
养猪
deep-litter production systems
litters
heavy metal
feeding pigs
