晾晒与添加剂对反枝苋青贮饲料品质的影响  

Effects of Moisture and Additives on Amaranthus retroflexus Silage

作　　者：梁超[1] 吴兆海[1] 许庆方[1] 玉柱[2] 白春生[3] 石永红[4] 刘建宁[4] 乔羽[1] 

机构地区：[1]山西农业大学动物科技学院,山西太谷030801 [2]中国农业大学动物科学院,北京100193 [3]沈阳农业大学园艺学院,辽宁沈阳110866 [4]山西省农科院畜牧兽医研究所,山西太原030032

出　　处：《草地学报》2012年第2期373-377,共5页Acta Agrestia Sinica

基　　金：山西省科技攻关计划项目(20100311052)(20080311030-2);"十二五"国家科技支撑计划(2011BAD17B02);山西省高等学校教学改革项目(J2011027);国家牧草产业技术体系(CARS-35)资助

摘　　要：为探究含水量及添加剂(甲酸和蔗糖)对反枝苋(Amaranthus retroflexus)青贮饲料品质的影响,以开花期的反枝苋为原料,在鲜贮和晾晒2种条件下分别设置甲酸(6mL.kg-1)和蔗糖(2%)处理,以不使用任何添加剂为对照,袋装青贮360d。结果表明:晾晒处理与鲜贮的反枝苋青贮饲料pH值和乳酸含量均无显著差异,而乙酸含量极显著增加(P<0.01),氨态氮含量显著降低(P<0.05),通过青贮硝酸盐含量显著降低,青贮饲料品质无显著差异。添加甲酸和蔗糖能够改善反枝苋青贮饲料的发酵品质,极显著降低反枝苋青贮饲料的pH值和氨态氮含量并提高乳酸生成量(P<0.01)。The effects of moisture and formic acid or sucrose on Amaranthus retroflexus silage were studied.Fresh or wilted A.retroflexus at flowering stages were packed and ensilaged for 360 d with sucrose(2%) or formic acid(6 mL·kg-1).Results showed that the pH and lactic acid content of wilted A.retroflexus silage were similar to that of fresh A.retroflexus silage,whereas acetic acid content was increased(P<0.01) and ammonia nitrogen content was reduced(P<0.05).Nitrate content was reduced significantly by ensiling.The quality of Amaranthus retroflexus silage was not improved significantly compared to control.The silage fermentation quality was improved by formic acid or sucrose which reduced the pH and ammonia nitrogen content significantly(P<0.01) and increased lactic acid content(P<0.01).

关 键 词：反枝苋 青贮 含水量 添加剂 

分 类 号：S816.5[农业科学—饲料科学]