摘要:150 healthy three-way cross growing pigs with 26.14±1.01 kg body weight were randomly divided into five groups with three repetitions.The growth performance, nutrient apparent digestibility and intestinal flora quantity of growing pigs respectively fed with basic diets+ 0, 0.1%, 0.25%, 0.5%and 1.0% gracilaria residue fermented feed for 7 dpreliminary trail period and 30 dregular trail period were measured to provide a reference for popularization and application of gracilaria residue fermented feed in breed of growing pigs.Result:The daily gain, feed/conversion ratio, lactobacillus quantity and Escherichia coli quantity of growing pigs fed with basic diet+ 0.25% gracilaria residue fermented feed increase by 23.91% (P<0.05), decrease by 15.36% (P<0.05), increase by 48.06% (P<0.05) and decrease by 20.59% (P<0.05) compared with CK respectively and the basic diets + gracilaria residue fermented feed can increase the energy, dry matter, crude protein, crude fibre, Ca and P digestibility significantly (P<0.05).The basic diets+ 0.25% gracilaria residue fermented feed can increase growth performance and feed/conversion ratio of growing pigs and improve intestinal micro-populations of growing pigs.%为江蓠渣发酵饲料在生长猪养殖上的推广应用提供参考, 选用150头平均体重为 (26.14±1.01)kg的健康"杜×长×大"三元杂交生长猪, 随机分为5组, 分别为对照组 (基础日粮), 0.1%、0.25%、0.5%和1.0%江蓠渣发酵饲料试验组 (在基础日粮中添加), 每组3个重复, 每个重复10头生长猪, 预试期7d, 正试期30d, 试验结束测定分析生长猪的生长性能、养分表观消化率和直肠肠道菌群数.结果表明:与对照组相比, 在生长猪基础日粮中添加0.25%江蓠渣发酵饲料的效果最好, 其中, 日增重提高23.91% (P<0.05), 料肉比降低15.36% (P<0.05);直肠中乳酸杆菌数提高48.06% (P<0.05), 而大肠杆菌数降低20.59% (P<0.05);显著提高能量、干物质、粗蛋白质、粗纤维、钙和磷的消化率 (P<0.05).在生长猪基础日粮中添加0.25%的江蓠渣发酵饲料, 能提高生长猪的生长性能、饲料利用率和改善肠道微生物菌群.