草业学报 ›› 2022, Vol. 31 ›› Issue (8): 167-177.DOI: 10.11686/cyxb2021312
• 研究论文 • 上一篇
吴永杰(), 丁浩, 邵涛, 赵杰, 董东, 代童童, 尹雪敬, 宗成, 李君风()
收稿日期:
2021-08-19
修回日期:
2021-11-22
出版日期:
2022-08-20
发布日期:
2022-07-01
通讯作者:
李君风
作者简介:
E-mail: ljf126ff@163.com基金资助:
Yong-jie WU(), Hao DING, Tao SHAO, Jie ZHAO, Dong DONG, Tong-tong DAI, Xue-jing YIN, Cheng ZONG, Jun-feng LI()
Received:
2021-08-19
Revised:
2021-11-22
Online:
2022-08-20
Published:
2022-07-01
Contact:
Jun-feng LI
摘要:
为探讨纤维素酶、木聚糖酶及两种酶组合添加对水稻秸秆青贮过程中结构性、水溶性碳水化合物组分含量及体外消化特性和发酵品质的影响,试验设4个处理组:1)0.3%蒸馏水(对照组,CO);2)0.3%纤维素酶(CE);3)0.3%木聚糖酶(XE);4)0.15%纤维素酶+0.15%木聚糖酶(组合酶组,CX),分别于青贮3、7、14、30 d后取样分析。结果表明,与CO相比,CE、XE和CX组显著提高了乳酸、葡萄糖、果糖和蔗糖含量,显著降低了pH值、氨态氮、总挥发性脂肪酸、酸性洗涤纤维、中性洗涤纤维、纤维素和半纤维素含量,减少了干物质损失(P<0.05)。酶制剂显著提高了水稻秸秆青贮饲料24、48和72 h时的累积产气量和干物质体外消化率(P<0.05)。青贮末期CX组有最高的乳酸含量(34.13 g·kg-1 DM)、体外产气量(68.27 mL)、干物质体外消化率(61.31%)和最低的pH值(4.36)。与CE和XE相比,CX组水溶性碳水化合物(葡萄糖、果糖和蔗糖)含量更高。综上所述,添加酶制剂可促进结构性碳水化合物的降解,提高水溶性碳水化合物的含量,改善水稻秸秆青贮发酵品质及体外消化率,与CE和XE相比,CX组发酵品质、碳水化合物的降解转化和体外消化特性更好。
吴永杰, 丁浩, 邵涛, 赵杰, 董东, 代童童, 尹雪敬, 宗成, 李君风. 酶制剂对水稻秸秆青贮发酵品质及体外消化特性的影响[J]. 草业学报, 2022, 31(8): 167-177.
Yong-jie WU, Hao DING, Tao SHAO, Jie ZHAO, Dong DONG, Tong-tong DAI, Xue-jing YIN, Cheng ZONG, Jun-feng LI. Effects of enzyme additives on fermentation quality and in vitro digestion characteristics of rice straw silage[J]. Acta Prataculturae Sinica, 2022, 31(8): 167-177.
测定项目Item | 含量Content |
---|---|
干物质 Dry matter (g·kg-1 FM) | 393.25 |
中性洗涤纤维 Neutral detergent fiber (g·kg-1 DM) | 715.12 |
酸性洗涤纤维 Acid detergent fiber (g·kg-1 DM) | 432.35 |
酸性洗涤木质素 Acid detergent lignin (g·kg-1 DM) | 65.85 |
纤维素 Cellulose (g·kg-1 DM) | 366.50 |
半纤维素 Hemicellulose (g·kg-1 DM) | 294.77 |
水溶性碳水化合物 Water soluble carbohydrate (g·kg-1 DM) | 46.32 |
粗蛋白 Crude protein (g·kg-1 DM) | 61.22 |
表1 水稻秸秆化学成分
Table 1 Chemical compositions of rice straw
测定项目Item | 含量Content |
---|---|
干物质 Dry matter (g·kg-1 FM) | 393.25 |
中性洗涤纤维 Neutral detergent fiber (g·kg-1 DM) | 715.12 |
酸性洗涤纤维 Acid detergent fiber (g·kg-1 DM) | 432.35 |
酸性洗涤木质素 Acid detergent lignin (g·kg-1 DM) | 65.85 |
纤维素 Cellulose (g·kg-1 DM) | 366.50 |
半纤维素 Hemicellulose (g·kg-1 DM) | 294.77 |
水溶性碳水化合物 Water soluble carbohydrate (g·kg-1 DM) | 46.32 |
粗蛋白 Crude protein (g·kg-1 DM) | 61.22 |
项目 Item | 处理 Treatment (T) | 青贮天数 Ensiling days (D) | 平均 Mean | 标准误 SEM | P 值 P value | |||||
---|---|---|---|---|---|---|---|---|---|---|
3 d | 7 d | 14 d | 30 d | 处理 T | 天数 D | 处理×天数 T×D | ||||
乳酸 Lactic acid (g·kg-1 DM) | CO | 8.67bC | 9.96cBC | 11.73cB | 16.52cA | 11.72b | 1.110 | <0.001 | <0.001 | <0.001 |
CE | 11.52abC | 18.93bB | 24.25bA | 26.39bA | 20.27a | |||||
XE | 12.51aD | 18.36bC | 23.97bB | 28.05bA | 20.72a | |||||
CX | 14.50aD | 21.87aC | 29.83aB | 34.13aA | 25.04a | |||||
乙酸 Acetic acid (g·kg-1 DM) | CO | 5.78aC | 8.86aB | 10.06aB | 15.33aA | 10.01a | 0.456 | <0.001 | <0.001 | <0.001 |
CE | 5.28abC | 7.12bB | 8.09bB | 13.63bA | 8.53b | |||||
XE | 5.16bC | 7.41bB | 7.99bcB | 12.80bA | 8.34b | |||||
CX | 4.34cD | 6.11bC | 7.00cB | 10.19cA | 6.91c | |||||
丙酸 Propionic acid (g·kg-1 DM) | CO | 0.72aC | 2.08aBC | 3.03aAB | 4.24aA | 2.52a | 0.155 | <0.001 | <0.001 | <0.001 |
CE | 0.57aC | 1.38bcB | 1.73bB | 2.94bA | 1.66b | |||||
XE | 0.53aC | 1.59bB | 1.83bB | 2.88bcA | 1.71b | |||||
CX | 0.50aD | 1.00cC | 1.48bB | 2.12cA | 1.35c | |||||
丁酸 Butyric acid (g·kg-1 DM) | CO | 0.94aD | 2.60aC | 4.18aB | 8.99aA | 4.18a | 0.303 | <0.001 | <0.001 | <0.001 |
CE | 0.84aC | 1.49bC | 3.64aB | 4.47bA | 2.61b | |||||
XE | 1.04aD | 1.93bC | 3.28abB | 4.84bA | 2.78b | |||||
CX | 0.74aA | 1.65bA | 2.35bA | 3.29cA | 2.01c | |||||
乳酸/乙酸 Lactic acid/ acetic acid | CO | 1.51cA | 1.14cA | 1.17cA | 1.08cA | 1.22c | 0.136 | <0.001 | <0.001 | <0.001 |
CE | 2.18bcB | 2.66bAB | 3.01bA | 1.95bB | 2.45b | |||||
XE | 2.43bB | 2.48bB | 3.00bA | 2.19bB | 2.53b | |||||
CX | 3.34aB | 3.58aB | 4.26aA | 3.35aB | 3.66a | |||||
总挥发性脂肪酸 Total volatile fatty acids (g·kg-1 DM) | CO | 7.45aD | 13.54aC | 17.27aB | 28.57aA | 16.71a | 0.891 | <0.001 | <0.001 | <0.001 |
CE | 6.69aD | 10.00bC | 13.47bB | 21.04bA | 12.80b | |||||
XE | 6.73aD | 10.93bC | 13.11bB | 20.52bA | 12.82b | |||||
CX | 5.58bD | 8.76cC | 10.83cB | 15.60cA | 10.61c |
表2 酶制剂对水稻秸秆青贮过程中有机酸含量的影响
Table 2 Effects of enzymes on organic acid contents of rice straw during ensiling
项目 Item | 处理 Treatment (T) | 青贮天数 Ensiling days (D) | 平均 Mean | 标准误 SEM | P 值 P value | |||||
---|---|---|---|---|---|---|---|---|---|---|
3 d | 7 d | 14 d | 30 d | 处理 T | 天数 D | 处理×天数 T×D | ||||
乳酸 Lactic acid (g·kg-1 DM) | CO | 8.67bC | 9.96cBC | 11.73cB | 16.52cA | 11.72b | 1.110 | <0.001 | <0.001 | <0.001 |
CE | 11.52abC | 18.93bB | 24.25bA | 26.39bA | 20.27a | |||||
XE | 12.51aD | 18.36bC | 23.97bB | 28.05bA | 20.72a | |||||
CX | 14.50aD | 21.87aC | 29.83aB | 34.13aA | 25.04a | |||||
乙酸 Acetic acid (g·kg-1 DM) | CO | 5.78aC | 8.86aB | 10.06aB | 15.33aA | 10.01a | 0.456 | <0.001 | <0.001 | <0.001 |
CE | 5.28abC | 7.12bB | 8.09bB | 13.63bA | 8.53b | |||||
XE | 5.16bC | 7.41bB | 7.99bcB | 12.80bA | 8.34b | |||||
CX | 4.34cD | 6.11bC | 7.00cB | 10.19cA | 6.91c | |||||
丙酸 Propionic acid (g·kg-1 DM) | CO | 0.72aC | 2.08aBC | 3.03aAB | 4.24aA | 2.52a | 0.155 | <0.001 | <0.001 | <0.001 |
CE | 0.57aC | 1.38bcB | 1.73bB | 2.94bA | 1.66b | |||||
XE | 0.53aC | 1.59bB | 1.83bB | 2.88bcA | 1.71b | |||||
CX | 0.50aD | 1.00cC | 1.48bB | 2.12cA | 1.35c | |||||
丁酸 Butyric acid (g·kg-1 DM) | CO | 0.94aD | 2.60aC | 4.18aB | 8.99aA | 4.18a | 0.303 | <0.001 | <0.001 | <0.001 |
CE | 0.84aC | 1.49bC | 3.64aB | 4.47bA | 2.61b | |||||
XE | 1.04aD | 1.93bC | 3.28abB | 4.84bA | 2.78b | |||||
CX | 0.74aA | 1.65bA | 2.35bA | 3.29cA | 2.01c | |||||
乳酸/乙酸 Lactic acid/ acetic acid | CO | 1.51cA | 1.14cA | 1.17cA | 1.08cA | 1.22c | 0.136 | <0.001 | <0.001 | <0.001 |
CE | 2.18bcB | 2.66bAB | 3.01bA | 1.95bB | 2.45b | |||||
XE | 2.43bB | 2.48bB | 3.00bA | 2.19bB | 2.53b | |||||
CX | 3.34aB | 3.58aB | 4.26aA | 3.35aB | 3.66a | |||||
总挥发性脂肪酸 Total volatile fatty acids (g·kg-1 DM) | CO | 7.45aD | 13.54aC | 17.27aB | 28.57aA | 16.71a | 0.891 | <0.001 | <0.001 | <0.001 |
CE | 6.69aD | 10.00bC | 13.47bB | 21.04bA | 12.80b | |||||
XE | 6.73aD | 10.93bC | 13.11bB | 20.52bA | 12.82b | |||||
CX | 5.58bD | 8.76cC | 10.83cB | 15.60cA | 10.61c |
项目 Item | 处理 Treatment (T) | 青贮天数 Ensiling days (D) | 平均值 Mean | 标准误 SEM | P 值 P value | |||||
---|---|---|---|---|---|---|---|---|---|---|
3 d | 7 d | 14 d | 30 d | 处理 T | 天数 D | 处理×天数 T×D | ||||
pH | CO | 5.35aA | 5.21aB | 5.01aC | 4.93aD | 5.13a | 0.037 | <0.001 | <0.001 | <0.001 |
CE | 5.12bA | 5.08abA | 4.77bB | 4.69bB | 4.92b | |||||
XE | 5.05bA | 5.01bAB | 4.83bBC | 4.73bC | 4.91b | |||||
CX | 4.99bA | 4.77cB | 4.50cC | 4.36cC | 4.65c | |||||
干物质 Dry matter (g·kg-1 FM) | CO | 389.17aA | 383.40aA | 378.63aA | 376.00aA | 381.81a | 2.068 | <0.001 | <0.001 | 0.889 |
CE | 379.20aA | 370.07aAB | 366.73abAB | 355.17aB | 367.79b | |||||
XE | 382.43aA | 372.40aA | 357.07bA | 352.87aA | 366.19b | |||||
CX | 373.33aA | 369.13aAB | 355.50bAB | 351.07aB | 362.26b | |||||
氨态氮 Ammonia nitrogen (g·kg-1 TN) | CO | 23.75aB | 33.15aB | 49.08aA | 58.67aA | 41.16a | 1.778 | <0.001 | 0.0042 | 0.779 |
CE | 20.03aB | 29.85aAB | 39.22aA | 47.62aA | 34.09b | |||||
XE | 21.58aC | 30.88aBC | 37.74aB | 46.63aA | 34.20b | |||||
CX | 21.11aC | 26.29aBC | 36.80aAB | 44.04aA | 32.06b | |||||
干物质损失 Dry matter loss (g·kg-1 DM) | CO | 30.40aD | 38.67aC | 64.60aB | 70.97aA | 51.17a | 2.830 | <0.001 | <0.001 | 0.500 |
CE | 22.50bC | 36.67abB | 59.43aA | 67.83aA | 46.60b | |||||
XE | 19.63bB | 34.27bB | 62.27aA | 67.77aA | 45.95b | |||||
CX | 11.26cD | 29.73cC | 52.16aB | 61.00bA | 38.55c |
表3 酶制剂对水稻秸秆青贮过程中pH、干物质、干物质损失和氨态氮含量的影响
Table 3 Effects of enzymes on pH, DM, DM loss and NH3-N contents of rice straw during ensiling
项目 Item | 处理 Treatment (T) | 青贮天数 Ensiling days (D) | 平均值 Mean | 标准误 SEM | P 值 P value | |||||
---|---|---|---|---|---|---|---|---|---|---|
3 d | 7 d | 14 d | 30 d | 处理 T | 天数 D | 处理×天数 T×D | ||||
pH | CO | 5.35aA | 5.21aB | 5.01aC | 4.93aD | 5.13a | 0.037 | <0.001 | <0.001 | <0.001 |
CE | 5.12bA | 5.08abA | 4.77bB | 4.69bB | 4.92b | |||||
XE | 5.05bA | 5.01bAB | 4.83bBC | 4.73bC | 4.91b | |||||
CX | 4.99bA | 4.77cB | 4.50cC | 4.36cC | 4.65c | |||||
干物质 Dry matter (g·kg-1 FM) | CO | 389.17aA | 383.40aA | 378.63aA | 376.00aA | 381.81a | 2.068 | <0.001 | <0.001 | 0.889 |
CE | 379.20aA | 370.07aAB | 366.73abAB | 355.17aB | 367.79b | |||||
XE | 382.43aA | 372.40aA | 357.07bA | 352.87aA | 366.19b | |||||
CX | 373.33aA | 369.13aAB | 355.50bAB | 351.07aB | 362.26b | |||||
氨态氮 Ammonia nitrogen (g·kg-1 TN) | CO | 23.75aB | 33.15aB | 49.08aA | 58.67aA | 41.16a | 1.778 | <0.001 | 0.0042 | 0.779 |
CE | 20.03aB | 29.85aAB | 39.22aA | 47.62aA | 34.09b | |||||
XE | 21.58aC | 30.88aBC | 37.74aB | 46.63aA | 34.20b | |||||
CX | 21.11aC | 26.29aBC | 36.80aAB | 44.04aA | 32.06b | |||||
干物质损失 Dry matter loss (g·kg-1 DM) | CO | 30.40aD | 38.67aC | 64.60aB | 70.97aA | 51.17a | 2.830 | <0.001 | <0.001 | 0.500 |
CE | 22.50bC | 36.67abB | 59.43aA | 67.83aA | 46.60b | |||||
XE | 19.63bB | 34.27bB | 62.27aA | 67.77aA | 45.95b | |||||
CX | 11.26cD | 29.73cC | 52.16aB | 61.00bA | 38.55c |
项目 Item | 处理 Treatment | 青贮天数 Ensiling days (D) | 平均值 Mean | 标准误 SEM | P 值 P value | |||||
---|---|---|---|---|---|---|---|---|---|---|
3 d | 7 d | 14 d | 30 d | 处理 T | 天数 D | T×D | ||||
中性洗涤纤维 Neutral detergent fiber (g·kg-1 DM) | CO | 712.75aA | 706.32aA | 694.38aB | 688.71aB | 700.54a | 3.133 | <0.001 | <0.001 | 0.012 |
CE | 694.38bA | 683.46bA | 668.34bB | 656.25bC | 675.61b | |||||
XE | 693.16bA | 681.91bB | 665.74bC | 654.41bD | 673.81b | |||||
CX | 684.61cA | 668.58cA | 648.61bB | 633.88cB | 658.92c | |||||
酸性洗涤纤维 Acid detergent fiber (g·kg-1 DM) | CO | 421.38aA | 417.60aA | 411.67aB | 408.00aB | 414.66a | 1.951 | <0.001 | <0.001 | 0.004 |
CE | 404.17bA | 396.29bAB | 391.96bBC | 384.08bcC | 394.13b | |||||
XE | 400.32bA | 396.53bAB | 392.87bBC | 389.30bC | 394.75b | |||||
CX | 404.51bA | 388.38bB | 378.45cBC | 373.58cC | 386.23c | |||||
酸性洗涤木质素 Acid detergent lignin (g·kg-1 DM) | CO | 63.08aA | 63.75aA | 62.35aA | 60.38aA | 62.35a | 0.434 | 0.026 | 0.099 | 0.934 |
CE | 64.94aA | 65.02aA | 67.40aA | 67.36aA | 64.68a | |||||
XE | 65.05aA | 64.71aA | 62.98aA | 61.75aA | 63.62a | |||||
CX | 65.55aA | 66.45aA | 65.45aA | 63.26aA | 65.17a | |||||
半纤维素 Hemicelluloses (g·kg-1 DM) | CO | 291.36aA | 288.72aA | 282.71aA | 280.71aB | 285.88a | 1.548 | <0.001 | 0.001 | 0.540 |
CE | 290.21aA | 287.17aA | 276.38abA | 272.17abA | 281.48a | |||||
XE | 292.84aA | 285.38aA | 272.87bB | 265.11bcB | 279.05ab | |||||
CX | 280.10bA | 280.20aA | 270.17bA | 260.30cA | 272.69b | |||||
纤维素 Celluloses (g·kg-1 DM) | CO | 358.30aA | 353.84aA | 349.32aA | 347.63aA | 352.27a | 2.027 | <0.001 | <0.001 | 0.012 |
CE | 339.20bA | 331.27bAB | 324.60bB | 322.72bcB | 329.45b | |||||
XE | 335.27bA | 331.81bA | 329.89bA | 327.55bA | 331.13b | |||||
CX | 338.95bA | 321.93bB | 312.32cBC | 310.32cC | 321.05c |
表4 酶制剂对水稻秸秆青贮过程中结构性碳水化合物含量的影响
Table 4 Effects of enzymes on structural carbohydrate contents of rice straw during ensiling
项目 Item | 处理 Treatment | 青贮天数 Ensiling days (D) | 平均值 Mean | 标准误 SEM | P 值 P value | |||||
---|---|---|---|---|---|---|---|---|---|---|
3 d | 7 d | 14 d | 30 d | 处理 T | 天数 D | T×D | ||||
中性洗涤纤维 Neutral detergent fiber (g·kg-1 DM) | CO | 712.75aA | 706.32aA | 694.38aB | 688.71aB | 700.54a | 3.133 | <0.001 | <0.001 | 0.012 |
CE | 694.38bA | 683.46bA | 668.34bB | 656.25bC | 675.61b | |||||
XE | 693.16bA | 681.91bB | 665.74bC | 654.41bD | 673.81b | |||||
CX | 684.61cA | 668.58cA | 648.61bB | 633.88cB | 658.92c | |||||
酸性洗涤纤维 Acid detergent fiber (g·kg-1 DM) | CO | 421.38aA | 417.60aA | 411.67aB | 408.00aB | 414.66a | 1.951 | <0.001 | <0.001 | 0.004 |
CE | 404.17bA | 396.29bAB | 391.96bBC | 384.08bcC | 394.13b | |||||
XE | 400.32bA | 396.53bAB | 392.87bBC | 389.30bC | 394.75b | |||||
CX | 404.51bA | 388.38bB | 378.45cBC | 373.58cC | 386.23c | |||||
酸性洗涤木质素 Acid detergent lignin (g·kg-1 DM) | CO | 63.08aA | 63.75aA | 62.35aA | 60.38aA | 62.35a | 0.434 | 0.026 | 0.099 | 0.934 |
CE | 64.94aA | 65.02aA | 67.40aA | 67.36aA | 64.68a | |||||
XE | 65.05aA | 64.71aA | 62.98aA | 61.75aA | 63.62a | |||||
CX | 65.55aA | 66.45aA | 65.45aA | 63.26aA | 65.17a | |||||
半纤维素 Hemicelluloses (g·kg-1 DM) | CO | 291.36aA | 288.72aA | 282.71aA | 280.71aB | 285.88a | 1.548 | <0.001 | 0.001 | 0.540 |
CE | 290.21aA | 287.17aA | 276.38abA | 272.17abA | 281.48a | |||||
XE | 292.84aA | 285.38aA | 272.87bB | 265.11bcB | 279.05ab | |||||
CX | 280.10bA | 280.20aA | 270.17bA | 260.30cA | 272.69b | |||||
纤维素 Celluloses (g·kg-1 DM) | CO | 358.30aA | 353.84aA | 349.32aA | 347.63aA | 352.27a | 2.027 | <0.001 | <0.001 | 0.012 |
CE | 339.20bA | 331.27bAB | 324.60bB | 322.72bcB | 329.45b | |||||
XE | 335.27bA | 331.81bA | 329.89bA | 327.55bA | 331.13b | |||||
CX | 338.95bA | 321.93bB | 312.32cBC | 310.32cC | 321.05c |
图1 酶制剂对水稻秸秆青贮过程中结构性碳水化合物与ADL比值的影响CL: 纤维素Cellulose; HC: 半纤维素Hemicellulose; ADL: 酸性洗涤木质素Acid detergent lignin; NDF: 中性洗涤纤维Neutral detergent fiber; ADF: 酸性洗涤纤维Acid detergent fiber; 同一时期不同小写字母表示差异显著(P<0.05),下同。Different lowercase letters in the same period indicate significant differences (P<0.05), the same below.
Fig.1 Effects of enzymes on ratio of structural carbohydrates to ADL of rice straw during ensiling
图 2 酶制剂对水稻秸秆青贮过程中水溶性碳水化合物含量的影响T: 处理Treatment; D: 青贮天数Ensiling days; T×D: 处理与青贮天数的交互作用The interaction between treatment and ensiling days.下同 The same below.
Fig.2 Effects of enzymes on water soluble carbohydrate contents of rice straw during ensiling
项目 Item | 处理 Treatment | 标准误 SEM | P 值 P value | |||
---|---|---|---|---|---|---|
CO | CE | XE | CX | |||
理论最大产气量 Asymptotic gas production (mL) | 44.89C | 54.57B | 57.25B | 68.27A | 2.569 | <0.001 |
产气速率常数 Rate of gas production (mL·h-1) | 0.040B | 0.047AB | 0.048AB | 0.051A | 0.001 | 0.008 |
产气延滞时间 Lag (h) | 2.73A | 2.31B | 2.68A | 2.25B | 0.069 | <0.001 |
24 h气体产量 Gas production at 24 h (mL) | 25.81C | 34.97B | 36.54B | 45.90A | 2.198 | <0.001 |
48 h气体产量 Gas production at 48 h (mL) | 37.62C | 48.23B | 50.64B | 61.71A | 2.630 | <0.001 |
72 h气体产量 Gas production at 72 h (mL) | 42.12C | 52.51B | 55.14B | 66.34A | 2.649 | <0.001 |
干物质体外消化率 IVDMD (%) | 52.84C | 57.09B | 57.57B | 61.31A | 0.966 | <0.001 |
中性洗涤纤维体外消化率 IVNDFD (%) | 47.86A | 49.24A | 49.28A | 50.95A | 0.569 | 0.322 |
酸性洗涤纤维体外消化率 IVADFD (%) | 40.87A | 42.34A | 41.70A | 44.49A | 0.539 | 0.073 |
表5 酶制剂对青贮30 d后水稻秸秆青贮饲料的体外消化率和产气参数的影响
Table 5 Effects of enzymes on in vitro digestibility and gas production profile of 30 days rice straw silage
项目 Item | 处理 Treatment | 标准误 SEM | P 值 P value | |||
---|---|---|---|---|---|---|
CO | CE | XE | CX | |||
理论最大产气量 Asymptotic gas production (mL) | 44.89C | 54.57B | 57.25B | 68.27A | 2.569 | <0.001 |
产气速率常数 Rate of gas production (mL·h-1) | 0.040B | 0.047AB | 0.048AB | 0.051A | 0.001 | 0.008 |
产气延滞时间 Lag (h) | 2.73A | 2.31B | 2.68A | 2.25B | 0.069 | <0.001 |
24 h气体产量 Gas production at 24 h (mL) | 25.81C | 34.97B | 36.54B | 45.90A | 2.198 | <0.001 |
48 h气体产量 Gas production at 48 h (mL) | 37.62C | 48.23B | 50.64B | 61.71A | 2.630 | <0.001 |
72 h气体产量 Gas production at 72 h (mL) | 42.12C | 52.51B | 55.14B | 66.34A | 2.649 | <0.001 |
干物质体外消化率 IVDMD (%) | 52.84C | 57.09B | 57.57B | 61.31A | 0.966 | <0.001 |
中性洗涤纤维体外消化率 IVNDFD (%) | 47.86A | 49.24A | 49.28A | 50.95A | 0.569 | 0.322 |
酸性洗涤纤维体外消化率 IVADFD (%) | 40.87A | 42.34A | 41.70A | 44.49A | 0.539 | 0.073 |
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