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頁籤選單縮合
題名 | 常用牧草與副產物的總消化道表面消化率=Total Tract Apparent Digestibilities of Commonly Used Forage and by-Products |
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作者 | 李春芳; 蕭宗法; 陳吉斌; 陳茂墻; | 書刊名 | 畜產研究 |
卷期 | 37:4 2004.12[民93.12] |
頁次 | 頁323-332 |
分類號 | 437.111 |
關鍵詞 | 牧草; 副產物; 總消化道表面消化率; Forage; By-products; Total tract apparent digestibility; |
語文 | 中文(Chinese) |
中文摘要 | 為瞭解常用乳牛飼料的營養價值,以荷蘭肉公牛進行全糞收集法的活體消化率測定,11項飼料包括自產盤固乾草、青刈狼尾草、青貯玉米、副產物日晒花生藤、乾燥高梁酒務、乾燥啤酒粕、進口梯牧乾草、百慕達乾草、百慕達草桿、苜蓿粒與苜蓿乾草。荷蘭肉牛公乾物質採食量分佈為體重的0.85%到2.74%,盤固乾草、梯牧乾草、百慕達乾草、百慕達草桿與乾燥啤酒粕為唯一飼糧時,無法提供牛隻維持營養需要,牛隻日失重0.69kg到1.17kg,青刈狼尾草、青貯玉米、苜蓿粒、苜蓿乾草、日晒花生藤與乾燥高梁酒粕可以維持-0.06kg到0.69kg的日增重。11項飼料的總可消化營養分數值分別為58.5%、59.9%、64.9%、57.3%、72.1%、66.9%、58.2%、61.5%、56.0%、57.8%與59.0%。試驗結果顯示,自產禾本科牧草可以做為牛隻飼糧的良好長纖來源 建議配合適量豆科牧草以提高牧草營養過度;高纖高消化率的副產物營養價值高,值得適量使用。第二部分試驗以盤固乾草分別探討牛隻體重與餵飼量對消化率的影響,得知體重300kg與400kg牛隻的活體消化率相近,且餵飼量為90%或100%食量時,除了粗脂肪外,其他組成的活體消化率都相近。 |
英文摘要 | To establish the feeding values of commonly used forage and by-products for cattle , total feces collection trials were conducted using Holstein bulls to measure the total tract apparent digestibility of each feed. Eleven feeds in included domestically-produced pangolagrass hey, green-cut napiergrass, corn silage, sun-cured peanut vine, dried distiller’s sorghum grains, dried brewer’s grains, imported timothy hay, hermudagrass heay, bermudagrass straw, alfalfa pellet and alfalfa hay. results showed that dry matter intake of these 11 feeds ranged from 0.85% to 2.745 of bull’s body weight (BW). When pangolagrass hay, timouthy hay, hermudagrass hay and straw, and dried brewer’s grains were offered as the sole diet, nutrient dupply was not sufficient for maintenance requirement. Bulls lost their BW from 0.69 kg to 1.17 kg daily. However, bulls fed on napiergrass, corn silage, alfalfa pellet, alfalfa hay, sun-cured peanut vine and distiller’s dried sorghum grains could achieve -0.06 kg to 0.69 kg BW gain per day. Total digestible nutrients of these 11 feeds were 58.5%, 59.9%, 64.9%, 57.3%, 72.1%, 66.9%, 58.2%, 61.5%, 56.0%, 57.8%, and 59.0%, respectively. It was concluded that domestically-produced grass forage could be a good source of long fiber for ruminants. Proper amount of legume forage was suggested to add to promote the nutrient density of forage part in the diet. By-products with high fiber and high digestibility were valuable feed sources and deserved more utilization. Effects of bull’s BW and intake level on in vivo digestibilities were investigated. Total tract apparent digestibilities of pangolagrass hay were similar between bulls of 300 kg and 400 kg BW. Except for the ether extract, nutrient digestibilities measured from 90% or 100% ad lib intakes were very similar. |
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