【摘要】 为降低猪粪中矿物元素的污染,研究饲料中去除铜、铁、锌、锰矿物添加剂对育肥猪猪粪中铜、铁、锌、锰的含量、化学形态及猪生长性能的影响。选择体重(62.5±0.50)kg的育肥猪随机均分为四组,分别饲喂添加矿物添加剂的常规日粮(对照组)、常规日粮中去除矿物添加剂后的基础日粮(去矿组)、基础日粮+益生菌的试验日粮(益生菌组)、基础日粮+益生菌后厌氧发酵的试验日粮(发酵组)。试验期31d。结果表明,和对照组相比,去矿组猪粪中矿物元素的含量降低(P<0.01),铁和锌残渣态的含量升高(P<0.05),铁氧化态的含量降低(P<0.05),日增重无差异(P>0.05);和去矿组相比,发酵组猪粪中铜、铁、锌、锰含量进一步降低(P<0.05),猪粪中矿物元素氧化态的含量及猪的日增重提高(P<0.05);益生菌组猪粪中矿物元素含量及猪日增重的变化居于去矿组和发酵组之间。结果表明育肥猪饲料中去除矿物添加剂可以减少猪粪中矿物元素的含量,对猪生产性能无影响,去除矿物添加剂的育肥猪饲料发酵后可以进一步降低猪粪中的矿物元素,改变粪中矿物元素的化学形态及促进猪的生长。更多还原

【Abstract】 To reduce the mineral pollution in pig feces,the effect of demineralized additives in diet on mineral contents(Cu,Fe,Zn,Mn)and their chemical speciation as well as growth performance of pigs were investigated.Fattening pigs weighing 62.5±0.50 kg were randomly divided into four groups and fed regular diet with mineral additives(control group),basal diet deleted mineral additives(mineral deletion group),basal diet+ probiotics(probiotics group),basal diet+fermentation diet(fermentation group).The trial lasted for 13 days.The results show that deletion of mineral additives in complete diet could significantly decrease the contents of Cu,Fe,Zn and Mn in pig feces(P<0.01),increase the contents of iron and zinc residue state(P<0.05),and reduce the contents of iron oxidation state(P<0.05).There was no significant difference on average daily gain(P>0.05).In contrast to demineralization group,fermentation further lowered the contents of Cu,Fe,Zn and Mn in feces(P<0.05),and increased the contents of oxidisable minerals(P<0.05),enhanced average daily gain of pigs(P<0.05);the mineral contents in feces and daily weight gain of probiotics group varied between the mineral deletion group and fermentation group.In summary,demineralized additives can reduce mineral contents in pig feces,meanwhile feed fermentation further reduce the mineral contents and change the states of mineral elements,which is beneficial to mineral emission reduction and pig growth.更多还原