在饲用油菜的生长期测鲜质量,烘干后测常规营养成分,分析鲜质量和营养成分的动态变化,用终花期油菜配制发酵全混日粮(fermented total mixed ration,FTMR)。200头湖羊随机分成2组,一组饲喂油菜FTMR,另一组饲喂由青贮玉米为主原料配制的...在饲用油菜的生长期测鲜质量,烘干后测常规营养成分,分析鲜质量和营养成分的动态变化,用终花期油菜配制发酵全混日粮(fermented total mixed ration,FTMR)。200头湖羊随机分成2组,一组饲喂油菜FTMR,另一组饲喂由青贮玉米为主原料配制的全混日粮(total mixed ration,TMR)。试验结束时每组选择10头公羊屠宰,测定屠体和肉质性状。结果表明:饲用油菜的苗期、蕾薹期和花期分别为8~98、99~146和147~180d,油菜鲜质量在终花期(180d)时达最大值,粗蛋白和粗脂肪在此时也达最高值,根据这两个营养成分计算的收获价值也在180d时达最大值。饲喂油菜FTMR的湖羊体质量增量、屠宰率、胴体瘦肉率、背膘厚和眼肌面积与饲喂青贮玉米TMR组没有显著差异,但油菜FTMR组湖羊采食量远低于青贮玉米组,其饲料转化效率和净收益显著高于青贮玉米组(P<0.01)。综上所述,饲用油菜在湖北省的最佳刈割期为终花末期(约180d),用其制作成FTMR饲喂湖羊可显著降低饲养成本,同时可缓解肉羊养殖中冬春季饲料不足的现状。展开更多
The aim of the current study was to investigate the effects of a lactic acid bacteria inoculant（Lactobacillus plantarum, LP）, fibrolytic enzyme（EN）, combination of LP and EN（LP＋EN） on fermentation quality, nutr...The aim of the current study was to investigate the effects of a lactic acid bacteria inoculant（Lactobacillus plantarum, LP）, fibrolytic enzyme（EN）, combination of LP and EN（LP＋EN） on fermentation quality, nutritive characteristics and in vitro digestibility of total mixed ration（TMR） silages containing 0, 7.5 and 15.0%（on dry matter basis） of rape（Brassica campestris L.） straw（RS）（denoted as CTMR, LTMR and MTMR, respectively）. After ensiling for 60 days, TMR silages without additives were well preserved, but MTMR had higher p H than CTMR and LTMR. There were no differences in other parameters of fermentation quality, microbial composition, nutrition and in vitro digestibility between CTMR and LTMR except for yeast and mold number and crude protein（CP） content. CTMR and LTMR silage had higher CP content, in vitro neutral detergent fiber digestibility（IVNDFD） and in vitro acid detergent fiber digestibility（IVADFD）, lower acid detergent fiber（ADF） content than MTMR silage. LP and EN decreased p H and increased dry matter（DM） recovery of TMR silages. LP＋EN improved the fermentation quality, nutritive characteristics and in vitro digestibility of TMR silages, showed by lower p H, ADF content, higher lactic acid content, in vitro dry matter digestibility（IVDMD） and IVNDFD. Therefore, It was suggested that TMR silage contained 7.5% RS on a DM basis and treated with LP＋EN can be as a useful feed for ruminant.展开更多
基金supported by the Natural Science Foundation of the Jiangsu Province for Young Scholars,China(BK20130694)the Specialized Research Fund for the Doctoral Program of Higher Education,China(20130097120053)+1 种基金the National Natural Science Foundation of China(31502014)the Project of Jiangsu Independent Innovation,China(CX(15)1003)
文摘The aim of the current study was to investigate the effects of a lactic acid bacteria inoculant（Lactobacillus plantarum, LP）, fibrolytic enzyme（EN）, combination of LP and EN（LP＋EN） on fermentation quality, nutritive characteristics and in vitro digestibility of total mixed ration（TMR） silages containing 0, 7.5 and 15.0%（on dry matter basis） of rape（Brassica campestris L.） straw（RS）（denoted as CTMR, LTMR and MTMR, respectively）. After ensiling for 60 days, TMR silages without additives were well preserved, but MTMR had higher p H than CTMR and LTMR. There were no differences in other parameters of fermentation quality, microbial composition, nutrition and in vitro digestibility between CTMR and LTMR except for yeast and mold number and crude protein（CP） content. CTMR and LTMR silage had higher CP content, in vitro neutral detergent fiber digestibility（IVNDFD） and in vitro acid detergent fiber digestibility（IVADFD）, lower acid detergent fiber（ADF） content than MTMR silage. LP and EN decreased p H and increased dry matter（DM） recovery of TMR silages. LP＋EN improved the fermentation quality, nutritive characteristics and in vitro digestibility of TMR silages, showed by lower p H, ADF content, higher lactic acid content, in vitro dry matter digestibility（IVDMD） and IVNDFD. Therefore, It was suggested that TMR silage contained 7.5% RS on a DM basis and treated with LP＋EN can be as a useful feed for ruminant.
