查詢結果分析
來源資料
相關文獻
- 以瘤胃袋法評估生長期對盤固草(Digitaria decumbens) 及 "Survenola" (Digitaria ×umfolozi Hall)乾物質消化率之影響
- The Effects of Starch and Protein Degradation Rates, Hay Sources, and Feeding Frequency on Rumen Microbial Fermentation in a Continuous Culture System
- 木質素的添加對植生帶的物性及發芽率之影響
- 鹼性無硫製漿中蒽醌在界面活性劑內之作用
- 施用牛糞及豬糞對盤固草產量品質及土壤地力之影響
- 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
- 豬場處理水對盤固草土柱滲漏水質之影響(1)--總氮、氨態氮及硝酸態氮
- 磷鉀肥對多年生花生與盤固草混植的生長影響及芻料利用效率
- 惠蓀林場三種不同林分枯枝落葉量與枝葉層分解速率之季節性變化
- 醬筍製程質地與有關化學成分變化之研究
頁籤選單縮合
題名 | 以瘤胃袋法評估生長期對盤固草(Digitaria decumbens) 及 "Survenola" (Digitaria ×umfolozi Hall)乾物質消化率之影響=Effects of Growth Stage on In-situ Dry Matter Degradability of Pangolagrass (Digitaria decumbens) and "Survenola" (Digitaria ×umfolozi Hall) |
---|---|
作者姓名(中文) | 施意敏; 廖成康; | 書刊名 | 中華農學會報 |
卷期 | 1:2 2000.04[民89.04] |
頁次 | 頁171-182 |
分類號 | 437.113 |
關鍵詞 | 盤固草; 木質素; 分解速率; Pangolagrass; Lignin; Degradation rate; |
語文 | 中文(Chinese) |
中文摘要 | 牧草生長的主要目的是提供反芻動物消化利用,評估牧草在瘤胃的消化率,不僅可使乳牛營養日糧的調配更為精確,並且可藉由消化率的分析探討影響牧草消化率的因子,進一步達到改善牧草品質之目標。因此,本試驗主要以瘤胃袋法評估生長期對盤固草'A254'(Digitaria decumbens, 3n = 27)及指草'Survenola'(D. x umfolozi Hall, 6n = 54)消化率的影響,並比較此兩種草消化率之差異與木質素含量間之關係。利用盤固草A254及Survenola已建立四年的牧草地,於春季及夏季收集4週或5週齡及8週齡的草樣,分別放入孔隙大小為53 ± 10 μm的消化袋,然後將消化袋放入開窗牛的瘤胃裡,分別培養0, 2, 4, 6, 12, 18, 24, 36, 48, 60, 72 h.利用Orskov發展的動力方程式,估算各草樣的乾物質在瘤胃裡的分解速率(%/h)及有效分解率(%)。試驗結果顯示,除夏季8週齡草樣外,其餘生長期Survenola在瘤胃的分解速率、有效分解率及試管乾物質消化率皆較A254佳。試管乾物質消化率及乾物質在瘤胃的有效分解率與植體木質素含量有很高的負相關。雖然夏季8週齡的Survenola草樣,其木質素含量為7.18%約為A254(3.61%)的兩倍,且乾物質中不消化的比率為 33.15%明顯較A254(23.63%)高,但因Survenola在瘤胃的分解速率(4.20%/h)約為A254(2.77%/h)的1.5倍,因此最後估算乾物質在瘤胃的有效分解率,Survenola為37.79%而A254為39.73%差異不明顯(LSD0.05 = 2.40)。Survenola在瘤胃裡有較高的有效分解率,肇因於其分解速率顯著高於A254,而分解速率除受木質素含量的影響外,尚可能與細胞壁其他成分有關。 |
英文摘要 | The goal of forage production must consider the digestibility of ruminant. The estimation of forage digestibility will enable nutritionists to formulate diets for lactating cows more accurately. On the other way, the examine of the limiting factor of cell wall is important for improving forage digestibility. The objective of this study was to evaluate the effects of growth stage and lignin concentration on in situ dry matter degradability of the two forage species, pangolagrass 'A254' (Digitaria decumbens) and digitgrass 'Survenola' (Digitaria x umfolozi Hall). Samples of A254 and Survenola were harvested at 4 weeks or 5 weeks and 8 weeks in well established pasture during spring and summer seasons. Dry matter degradability was determined by placing samples in polyester bags with 53 ± 10 μm pore sizes which were then put into the rumen of two cows for 0, 2, 4, 6, 12, 18, 24, 36, 48, 60, 72 h. The kinetics of dry matter degradation was examined using Orskov's model. The rate of degradation, effective degradability and in vitro dry matter digestibility (IVDMD) of Survenola were significantly higher than A254 except the 8-week old forage harvested at summer. The effective degradability and in vitro dry matter digestibility had negative relations to lignin concentration. The effective degradability was not significantly different between Survenola (37.79%) and A254 (39.73%) grown for 8 weeks during summer season, although the indigestible fraction of Survenola was 33.15% which was higher than A254 (23.63%) and the lignin concentration of Survenola (7.18%) was significantly higher than A254 (3.61%). It is reasonable for the results because the degradation rate of Survenola (4.20%/h) was almost one and half times of A254 (2.77%/h). The results indicated that the degradation rate is an important factor for improving effective degradability of Survenola and the degradation rate may be related to other components of cell wall in addition to lignin concentration. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。