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題名 | 澱粉、蛋白質與纖維不同分解速率組合對臺灣山羊消化之影響=Effect of Fiber, Starch and Protein Degradation Rates on Rumen Digestion and Metabolism of Taiwan Native Goats |
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作者 | 王翰聰; 徐濟泰; | 書刊名 | 中國畜牧學會會誌 |
卷期 | 28:2 1999.06[民88.06] |
頁次 | 頁157-171 |
分類號 | 437.58 |
關鍵詞 | 分解速率; 臺灣山羊; 芻料中洗纖維; 瘤胃可分解澱粉; 蛋白質; 消化; Degradation; Taiwan native goats; Forage neutral detergent fiber; Ruminal degradable starch; Protein; Digestion; |
語文 | 中文(Chinese) |
中文摘要 | 本試驗之目的,在探討山羊飼糧中纖維、澱粉與蛋白質不同分解速率組合,對山 羊瘤胃消化代謝之影響。試驗採用4頭裝置瘤胃與十二指腸導管之臺灣山羊,以兩個4×4 拉丁正方試驗設計(4試驗期,每期包括10天適應期與4天採樣期),進行包含不同芻料中洗 纖維(FNDF)對瘤胃可分解澱粉(RDS)含量比例的6種不同纖維(慢:LF;快:HF)、澱粉(慢:LS; 快:HS)與蛋白質(慢:LP;快:HP)分解速率組合之飼糧處理:飼糧1(LF+LS÷LP,FNDF/RDS=1); 飼糧2(LF+HS+HP,FNDF/RDS=1);飼糧3(LF+LS+LP,FNDF/RDS=0.8);飼糧4(LF+HS+HP, FNDF/RDS=0.8);飼糧5(HF+LS+LP,FNDF/RDS=1);飼糧6(HF+HS+HP,FNDF/RDS=1)。第一 個拉丁正方,比較飼糧1、2、3、5;第二個拉丁正方,比較飼糧2、4、5、6。 試驗結果顯示,HS配合HP在高FNDF/RDS比例時,會有較佳的微生物蛋白質合成量(飼 糧2);但在FNDF/RDS比例低時,微生物合成效果則會較差(飼糧4)。在使用HS+HP時,若增 加纖維來源的分解速度,因能量與氨放出無法配合,會降低微生物蛋白質的合成效率(飼糧 6)。瘤胃內蛋白質消化率主要受到蛋白質來源分解率快慢的影響。澱粉來源對瘤胃內澱粉消 化率影響顯著,而澱粉量高且分解率低時,會有較低的瘤胃澱粉消化率(飼糧3,78.47%),但 是全消化道的澱粉消化率在各組間則無顯著差異。纖維消化率主要受到纖維來源分解率高低 的影響,而在RDS比例過高又分解快下,會降低瘤胃內NDF消化率(飼糧3 vs. 4),但是對 ADF影響較小。提高瘤胃中澱粉與蛋白質分解率並不會提高瘤胃的纖維分解率(飼糧1 vs. 2); 而提高瘤胃中纖維分解率(飼糧6 vs. 2;飼糧5 vs. 1),也無助於提高瘤胃中澱粉與蛋白質 分解率。 |
英文摘要 | The objective of the experiment was to investigate the effect of different combinations of varying dietary fiber, starch and protein degradation rates on goats' digestion. Four ruminal and duodenal cannulated Taiwan native goats were used in two 4×4 Latin square design experiments (10 d adjustment and 4 d sample collecting for each period) to test 6 different treatment diets: diet 1 (low fiber degradability (LF)+low starch degradability (LS)+low protein degradability (LP), FNDF/RDS=1); diet 2 (LF+high starch degradability (HS)+high protein degradability (HP), FNDF/RDS=1); diet 3 (LF+LS+LP, FNDF/RDS=0.8); diet 4 (LF+HS+HP, FNDF/RDS=0.8); diet 5 (high fiber degradability (HF)+LS+LP, FNDF/RDS= 1); diet 6 (HF+HS+HP, FNDF/RDS=1). The first Latin square compared diets 1, 2, 3, and 5. The second Latin square tested diets 2, 4, 5, and 6. Experimental results showed that with FNDF/RDS=1, the microbial protein synthesis increased when diets had HS and HP (diet 2), but microbial protein synthesis was lower when END F/RDS=0.8 (diet 4). Microbial protein synthesis decreased when fiber degradability increased and diet with HS and HP was fed at the same time (diet 6). Degradation rates of protein source were the most important factors for ruminal protein digestibility, but fiber and starch sources had no significant effect on protein digestibility in the rumen. Ruminal starch digestibility was significantly affected by the starch source. High starch content and low starch degradability resulted in the lowest ruminal starch digestibility (diet 3, 78.5%), but total tract starch digestibility were not different among all diets. Fiber source affected fiber digestibility in the rumen, ruminal NDF digestibility decreased when FNDF/RDS=0.8, but ADF digestibility was not affected by RDS content. High degradability of starch and protein did not increase fiber digestibility in the rumen (diets 1 and 2), neither could high degradability of fiber increase starch and protein digestibility in the rumen (diets 6 and 2; diets 5 and 1). |
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