- 期刊
盤固草半乾青貯捆包前淋雨及乾物率對山羊適口性的影響
Effect of rain exposure before wrapping and dry matter contents of pangolagrass haylages on palatability of goats
摘要
曝曬過程突然遭遇雨淋的盤固草是否適於調製為半乾青貯是一實務問題，本研究探討於多濕季節曝曬過程遭遇雨淋後調製半乾青貯的發酵品質，並以三組飼養試驗評估其羊隻適口性，目的為探討盤固草乾草生產過程遭遇雨淋後，以半乾青貯進行替代性調製的可行性。試驗結果顯示，儲存兩個月後，經雨淋1天後之3個處理乾物率介於50－58%之間，未經接種處理者之發酵品質變異較大，而接種處理者發酵結果均良好。後續試驗一比較未淋雨－接種半乾青貯（CK-I）、淋雨1天－全量接種半乾青貯（R_1-I）、淋雨1天－半量接種半乾青貯（R_1-HI）及乾草之適口性，結果顯示，淋雨1天－半量接種者（R_1-HI）其適口性與未淋雨者相當，淋雨1天－全量接種者（R_1-I）之3小時採食量稍降低，但均顯著優於乾草。儲存4個月與儲存2個月的青貯品質分析差異不顯著，而羊隻對經雨淋者的偏好並不亞於未淋雨對照，且乾物採食量顯著較高（試驗2）。由於未淋雨對照與淋雨半乾青貯間除淋雨之外，尚存在明顯的乾物率差異，因此，本研究再續加探討乾物率對適口性的影響（試驗3），顯示乾物率50%之半乾青貯料的適口性顯著優於33%者，且與接種與否無關，青貯評分差異對適口性的影響亦小。總結本試驗結果，乾草翻曬過程遭遇雨淋之後，若能控制適當乾物率於40－60%範圍，且置於田間不超過2天，其青貯品質與適口性均佳；接種則有助於青貯發酵的穩定。
並列摘要
Whether pangolagrass being exposed to sudden rain during the hay-processing period is suitable for making haylage is one practical issue. This study investigated the fermentation quality of pangolagrass haylage after pangolsgrass hay is exposed to rain during the wet season. Three sets of feeding experiment was conducted to evaluate the palatability of goat. The purpose of these experiments was to determine the feasibility of replacing with haylage after the pangolagrass was exposed to rain during hay making. After two months of storage, the test results shows that pangolagrass haylages for this study, having been exposed to the rain for one day with three treatments, had the dry matter contents between 50 ~ 58%. The fermentation qualities of those with inoculation were good, while the quality of that without inoculation showed quality variation. The results of palatability test 1 showed that the palatability of the treatment of haylage inoculation without being rained (CK-1), haylage full inoculation with one-day raining (R_1-I), and haylage hall-inoculation with one-day raining (R_1-HI), and dry hay were compared. The results suggested that the palatability of haylage hall-inoculation with one-day raining (R_1-HI) was equivalent to that without rained while the three-hour feed intake of full inoculation with one-day raining (R_1-I) was slightly lowered, but nonetheless significantly better than dry hay. The results of silage quality analysis between 4 months storage and 2 months storage showed no significant differences. The goats' preference for one day rain was not poor compared with that of controlled group. Moreover, the dry intake content was significantly higher (Test 2). There was also significant dry content variation apart from the rain between the controlled group without raining and the rained haylage. This study continued to explore the effect of dry matter content on palatability (Test 3), and the results showed that the palatability of pangolagrass haylage with a dry matter content of 50% was significantly better than that of 33%, and it was unrelated to inoculation. The difference in silage scores also had a small effect on palatability. It is concluded that when the grass is exposed to rain during the withering process and if the dry matter content could be controlled within the range of 40 ~ 60%, in addition to storing in the field for no more than 2 days, the haylage quality and palatability would be good. Moreover, inoculation can help stabilization of haylage fermentation.