Degradation of Peanut Straws in Rumen of Fuqing Goats
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摘要:
目的 探究花生秸秆干物质(DM)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)在福清山羊瘤胃内消化降解规律。 方法 本试验选用3头安装有永久性瘤胃瘘管的福清山羊为试验动物,采用尼龙袋法,对4份不同地区不同季节采集的花生秸秆(花生秸秆1为2016年10月28日收获于清流、花生秸秆2为2017年6月19日收获于清流、花生秸秆3为2017年6月3日收获于福清、花生秸秆4为2017年11月10日收获于清流)样本的干物质(DM)、酸性洗涤纤维(ADF)和中性洗涤纤维(NDF)在各个时间点(4、8、16、24、36、48、72 h)的瘤胃降解率和降解参数进行测定。 结果 花生秸秆2和花生秸秆4的粗蛋白质含量较高,中性洗涤纤维较低。在福清山羊瘤胃内,4种花生秸秆样本的DM、NDF和ADF在瘤胃内降解趋势类似,均随着降解时间延长呈现上升的趋势,48–72 h花生秸秆DM的降解率达到50%–57%。 结论 综合评价,在清流10月底和11月初收获的两份花生秸秆的降解率较高,说明福清山羊对秋收花生秸秆消化率较高。 Abstract:Objective Digestion of peanut straws (PSs) collected at different seasons and areas in rumen of Fuqing goats was studied. Method Three Fuqing goats permanently in-planted with ruminal cannula were fed PS collected at different seasons and areas. PS1 was harvest at Qingliu on October 28, 2016, PS2 at Qingliu on June 19, 2017, PS3 at Fuqing on June 3, 2017, and PS4 at Qingliu on November 10, 2017. The in-rumen degradation rates of PS with respect of dried matters (DM), acidic detergent fibers (ADF), and neutral detergent fibers (NDF) in 4, 8, 16, 24, 36, 48 and 72 h were determined by placing the PS samples in Nylon bags. Result PS2 and 4 had higher crude protein but lower NDF than the other specimens. The DM, ADF, and NDF degradation rates of all PSs were similar and increased with time in rumen. In 48–72 h, 50%–57% of DM in PS was degraded. Conclusion PS 1 and 4 were shown to have higher degradation rate in the goat rumen indicating a preference in choosing PS harvested in autumn over the other time in a year. -
Key words:
- peanut straw /
- rumen /
- degradation rate /
- nylon bag method
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表 1 花生秸秆的化学成分
Table 1. Chemical composition of peanut straws
项目
Items干物质
Dry matter
(DM)/%可溶性碳水化合物
Water soluble-carbohydrate
(WSC)/%DM粗蛋白
Crude protein
(CP)/%DM中性洗涤纤维
Neutral detergent fiber
(NDF)/%DM酸性洗涤纤维
Acid detergent fiber
(ADF)/%DM半纤维素
Hemi-cellulase
(HC)/%DM粗脂肪
Ether extract
(EE)/%DM灰分
Ash/%
DM花生秸秆1 PS1 31.41±0.10 ab 4.21±0.12 b 10.5±1.67 c 60.6±2.76 a 34.9±1.78 c 25.7±1.07 a 1.85±1.07 c 22.34±1.98 a 花生秸秆2 PS2 30.04±0.22 ab 5.55±0.16 a 14.7±1.90 a 46.3±1.59 c 41.7±1.22 b 4.6±1.88 c 2.63±0.96 a 13.42±1.88 c 花生秸秆3 PS3 32.18±0.15 a 3.72±0.09 c 12.5±2.14 b 57.1±2.09 ab 47.9±1.99 a 9.2±1.23 b 2.07±1.01 b 13.47±1.65 c 花生秸秆4 PS4 29.25±0.09 b 4.13±0.11 b 14.8±1.23 a 52.0±2.11 b 40.7±1.86 b 11.3±1.41 b 1.55±1.89 c 18.19±1.06 b 注:同列数据后不同小写字母表示差异显著。
Note: Means with different lowercase letters on a same column are significantly different (P<0.05).表 2 瘤胃内干物质的降解率
Table 2. Degradation rate of dry matters in goat rumen
(单位:%) 降解时间 Time of degradation 花生秸秆1 PS1 花生秸秆2 PS2 花生秸秆3 PS3 花生秸秆4 PS4 4 h 5.89±2.46 dB 13.76±0.42 dA 4.88±2.71 eB 2.51±1.11 eC 8 h 25.03±3.91 cA 19.87±0.75 dB 25.33±6.06 dA 15.11±5.51 dB 16 h 42.91±2.33 bcA 43.53±1.76 cA 33.19±2.29 cB 35.63±6.74 cB 24 h 45.59±0.99 b 47.98±4.32 b 47.81±1.17 b 45.43±1.78 b 36 h 42.94±1.16 bc 49.99±2.75 a 46.67±2.85 b 47.15±4.29 b 48 h 51.70±0.66 a 49.87±3.98 a 54.79±1.41 a 53.08±1.22 a 72 h 49.27±1.05 a 50.40±4.31 a 51.08±0.85 a 50.82±2.86 a 注:同列数据后不同小写字母表示不同时间点的降解率差异显著(P<0.05);同行数据后不同大写字母表示不同原料的降解率差异显著(P<0.05)。表3、4同。
Note: Means with different lowercase letters on a same column are significantly different on degradation rate at different sampling times (P<0.05); and those with different uppercase letters on a same row, between different PSs (P<0.05). The same for Tables 3, 4.表 3 瘤胃内中性洗涤纤维的降解率
Table 3. Degradation rate of NDF in rumen
(单位:%) 降解时间 Time of degradation 花生秸秆1 PS1 花生秸秆2 PS2 花生秸秆3 PS3 花生秸秆4 PS4 4 h 6.04±1.58 dB 10.72±1.19 dA 5.04±1.31 eB 9.58±1.96 dA 8 h 20.82±3.96 cA 13.86±1.03 dB 15.13±3.49 dB 20.00±5.27 cA 16 h 32.42±2.64 bA 31.81±1.35 cA 26.91±3.09 cB 34.86±6.12 bA 24 h 32.37±0.59 bB 35.23±3.78 bB 32.26±1.11 bB 42.79±1.79 bA 36 h 33.57±0.62 bB 37.13±2.72 bB 35.42±3.20 bB 46.65±4.94 abA 48 h 40.56±1.33 aB 38.83±3.83 bB 39.69±1.71 aB 47.17±1.86 aA 72 h 41.43±1.26 aB 42.64±4.75 aB 41.76±1.29 aB 50.94±1.19 aA 表 4 瘤胃内酸性洗涤纤维的降解率
Table 4. Degradation rate of ADF in rumen
(单位:%) 降解时间 Time of degradation 花生秸秆1 PS1 花生秸秆2 PS2 花生秸秆3 PS3 花生秸秆4 PS4 4 h 7.64±1.71 cA 7.91±1.77 eA 3.34±2.40 eB 2.28±4.26 dB 8 h 25.46±5.79 bcA 11.42±2.55 dB 13.75±2.14 dB 15.95±6.93 cB 16 h 28.29±2.76 bAB 25.46±1.17 cAB 22.50±2.78 cB 32.24±9.73 bA 24 h 29.07±2.23 b 27.41±4.53 bc 31.06±2.34 b 33.46±1.59 b 36 h 29.54±0.84 b 30.72±2.77 b 33.18±3.05 b 34.94±2.99 b 48 h 36.46±1.82 a 33.22±4.56 ab 37.15±2.00 a 37.71±1.23 a 72 h 37.02±0.75 a 36.18±8.85 a 38.59±1.66 a 39.70±1.42 a -
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