不同比例枯黄期骆驼刺与棉籽壳混贮对青贮品质的影响

Effects of Mix-ensiling of Different Ratios of Withered Alhagi sparsifolia to Cottonseed Hulls on Silage Quality

本试验旨在研究不同比例枯黄期骆驼刺与棉籽壳混贮对青贮品质的影响。7个处理(处理Ⅰ～Ⅶ)分别采用枯黄期骆驼刺、棉籽壳及其二者不同比例(3:7、4:6、5:5、6:4和7:3)混合料为青贮原料,每个处理3个重复。评价感官指标,并分析青贮料的pH、粗蛋白质(CP)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、乙酸、丙酸、丁酸、乳酸及总酸的变化。结果表明:骆驼刺虽然是豆科牧草,却容易青贮成功,青贮发酵以单乳酸发酵为主。处理Ⅴ、Ⅵ和Ⅶ中的可溶性碳水化合物含量显著高于处理Ⅱ(P<0.05),处理Ⅳ、Ⅴ、Ⅵ和Ⅶ的pH和氨态氮占总氮的百分比显著和极显著低于处理Ⅱ(P<0.05,P<0.01),处理Ⅳ、Ⅴ、Ⅵ和Ⅶ的总酸含量极显著高于处理Ⅱ(P<0.01)。混合青贮饲料中乳酸含量均极显著高于处理Ⅱ(P<0.01)。由此得出,骆驼刺与棉籽壳混贮能改善棉籽壳青贮料的品质。

The experiment was conducted to study the effects of mix-ensiling of different ratios of withered Alhagi sparsifolia to cottonseed hulls on silage quality.Seven treatments（treatment Ⅰ～Ⅶ） contained withered Alhagi sparsifolia,cottonseed hulls and the different ratio mixture of them（3∶7,4∶6,5∶5,6∶4 and 7∶3）,respectively,for silage fermentation,with 3 replicates for each treatment.Silages samples were evaluated for sensory indices and analyzed for pH,crude protein（CP）,neutral detergent fiber（NDF）,acid detergent fiber（ADF）,acetic acid（AA）,propionic acid（PA）,butyric acid（BA）,lactic acid（LA） and total acid（TA）.The results showed as follows：Alhagi sparsifolia could be ensiled successfully although it was legumes herbage,and the primary fermentation was homolactic fermentation.The contents of water soluble carbohydrate（WSC） in treatments Ⅴ,Ⅵ and Ⅶ were significantly higher than that in treatment Ⅱ（P0.05）,the pH and ratio of NH3-N/TN in treatments Ⅳ,Ⅴ,Ⅵ and Ⅶ were significantly lower than those in treatment Ⅱ（P0.05,P0.01）,and the contents of TA in treatments Ⅳ,Ⅴ,Ⅵ and Ⅶ were significantly higher than that in treatment Ⅱ（P0.01）,the contents of lactic acid（LA） in all mix-ensiling were significantly higher than that in treatment Ⅱ（P0.01）.It was concluded that Alhagi sparsifolia and cottonseed hulls mix-ensiling could improve the quality of cottonseed hulls silage.