草业学报 ›› 2025, Vol. 34 ›› Issue (11): 150-160.DOI: 10.11686/cyxb2024481
• 研究论文 • 上一篇
梁韵仪1(
), 陈雅坤1, 何可可1,2, 杨嘉宇1,3, 赵连生1(
), 卜登攀1(
)
收稿日期:2024-12-03
修回日期:2025-02-17
出版日期:2025-11-20
发布日期:2025-10-09
通讯作者:
赵连生,卜登攀
作者简介:aaronann@163.com基金资助:
Yun-yi LIANG1(
), Ya-kun CHEN1, Ke-ke HE1,2, Jia-yu YANG1,3, Lian-sheng ZHAO1(
), Deng-pan BU1(
)
Received:2024-12-03
Revised:2025-02-17
Online:2025-11-20
Published:2025-10-09
Contact:
Lian-sheng ZHAO,Deng-pan BU
摘要:
饲草等粗饲料是反刍动物日粮纤维的主要来源。中性洗涤纤维(NDF)是衡量饲草纤维含量的重要指标,其消化率是评估饲草质量、动物干物质采食量的关键参数。目前常用体外48 h NDF消化率(NDFD48)评估饲草NDF的可消化情况。准确测定粗饲料NDFD48值对精准平衡动物日粮具有指导意义。目前粗饲料NDFD48可用瘤胃尼龙袋法、实验室半体内法测定或近红外快速检测,但通常受测定试验条件和仪器设备等制约。基于NDFD48的生物学意义,旨在拟合构建估测NDFD48的计算方法。利用奶牛营养需要(NASEM,2021)中饲草纤维指标[NDF和酸性洗涤纤维(ADF)]及消化率指标(NDFD48)作为测试集,构建了NDFD48模型,并选取Journal of Dairy Science期刊中14篇文章的相关指标及本实验室实测指标作为2套验证集,对模型进行了验证。结果发现,NDFD48计算值与2套NDFD48实测值均具有显著相关性(P<0.001),R2分别为0.89和0.85。利用一致性相关系数(CCC)对模型进行验证,相关性达到0.93和0.91。此模型检测指标少,计算简便,精准度高。模型评估表明,该模型可为生产应用及饲草营养预判提供理论参考。
梁韵仪, 陈雅坤, 何可可, 杨嘉宇, 赵连生, 卜登攀. 饲草中性洗涤纤维48 h消化率预测模型的构建[J]. 草业学报, 2025, 34(11): 150-160.
Yun-yi LIANG, Ya-kun CHEN, Ke-ke HE, Jia-yu YANG, Lian-sheng ZHAO, Deng-pan BU. Construction of a predictive model for the 48-hour digestibility of neutral detergent fiber in forage[J]. Acta Prataculturae Sinica, 2025, 34(11): 150-160.
| 国际饲料编号International feed number | 饲料名称 Feed name | 酸性洗涤纤维ADF (%DM) | 中性洗涤纤维NDF (%DM) | 中性洗涤纤维48 h消化率NDFD48 (%NDF) |
|---|---|---|---|---|
| NRC6F1 | 苜蓿草Alfalfa | 33.9 | 42.9 | 49.1 |
| NRC6F33 | 冷季草,成熟Cool season grass, mature | 41.4 | 66.7 | 55.8 |
| NRC6F34 | 冷季草,中熟Cool season grass, medium-mature | 35.5 | 58.0 | 67.8 |
| NRC6F89 | 禾豆混播干草Grass and legume mixed hay | 39.3 | 58.2 | 54.5 |
| NRC6F84 | 禾豆混播干草,禾为主,中熟Grass and legume mixed hay, grass dominant, medium-mature | 33.8 | 54.7 | 67.5 |
| NRC6F86 | 禾豆混播干草,豆为主,成熟Grass and legume mixed hay, legume dominant, mature | 38.7 | 51.2 | 48.0 |
| NRC6F91 | 豆科干草,未成熟Leguminous hay, immature | 30.7 | 37.7 | 51.4 |
| NRC6F92 | 豆科干草,成熟Leguminous hay, mature | 37.2 | 46.6 | 43.4 |
| NRC6F93 | 豆科干草,中熟Leguminous hay, medium-mature | 32.1 | 41.1 | 52.4 |
| NRC6F107 | 豌豆干草Pea hay | 32.0 | 43.4 | 58.5 |
| NRC6F109 | 稻草Rice straw | 62.0 | 43.0 | 48.2 |
| NRC6F110 | 谷草Millet straw | 75.0 | 50.0 | 43.2 |
| NRC6F111 | 玉米秸秆Corn stalks | 70.8 | 46.7 | 49.3 |
| NRC6F112 | 莜麦秸Hulless oat straw | 74.0 | 49.0 | 44.4 |
| NRC6F114 | 花生秧Peanut straw | 37.9 | 45.8 | 40.1 |
| NRC6F131 | 一年生黑麦草,中熟Annual ryegrass, medium-mature | 36.7 | 57.3 | 59.8 |
| NRC6F127 | 一年生黑麦草,成熟Annual ryegrass, mature | 42.7 | 66.8 | 55.9 |
| NRC6F138 | 高粱青干草Sorghum green hay | 38.8 | 63.0 | 60.8 |
| NRC6F142 | 苏丹草Sudan grass | 39.3 | 61.0 | 54.4 |
| NRC6F143 | 黄豆草Soybean grass | 31.3 | 40.3 | 50.5 |
| NRC6F151 | 苏丹草,成熟Sudan grass, mature | 41.6 | 65.8 | 55.8 |
| NRC6F152 | 苏丹草,中熟Sudan grass, medium-mature | 36.9 | 54.6 | 56.7 |
| NRC16F164 | 小黑麦干草Triticale hay | 38.3 | 60.0 | 63.7 |
| NRC16F176 | 小麦秸秆Wheat straw | 53.1 | 76.9 | 41.8 |
| NRC16F18 | 狗牙根青贮,成熟Bermudagrass silage, mature | 42.8 | 70.8 | 52.3 |
| NRC16F19 | 狗牙根青贮,中熟Bermudagrass silage, medium-mature | 39.0 | 64.1 | 63.5 |
| NRC16F35 | 冷季草青贮Cool season grass silage | 39.0 | 62.1 | 63.6 |
| NRC16F52 | 玉米秸秆,青贮,高干物质Corn stalks, silage, high dry matter | 46.9 | 72.0 | 56.2 |
| NRC16F51 | 玉米秸秆,青贮,低干物质Corn stalks, silage, low dry matter | 44.8 | 66.2 | 52.8 |
| NRC16F90 | 草豆混播青贮Grass and beans mixed silage | 34.8 | 51.2 | 61.1 |
| NRC16F88 | 禾豆混播青贮,豆为主Grass-legume mixed silage, legume-dominant | 33.9 | 45.9 | 56.2 |
| NRC16F95 | 豆科牧草青贮,中熟Leguminous forage silage, medium-mature | 33.7 | 43.2 | 49.4 |
| NRC16F100 | 粟黍青贮Foxtail millet silage | 39.2 | 59.7 | 61.2 |
| NRC16F106 | 燕麦青贮,中熟Oat silage, medium-mature | 38.8 | 57.4 | 54.1 |
| NRC16F108 | 豌豆青贮Pea silage | 37.1 | 52.5 | 57.7 |
| NRC16F121 | 水稻青贮,带穗Rice silage with panicles | 31.8 | 41.9 | 54.2 |
| NRC16F130 | 一年生黑麦草青贮,中熟Annual ryegrass silage, medium-mature | 38.3 | 58.0 | 61.9 |
| NRC16F135 | 饲用高粱青贮,未成熟Sorghum silage, immature | 36.4 | 56.7 | 58.5 |
| NRC16F136 | 饲用高粱青贮,成熟Sorghum silage, mature | 39.2 | 61.6 | 63.6 |
| NRC16F140 | 苏丹草青贮Sudan grass silage | 38.9 | 59.5 | 54.9 |
| NRC16F154 | 苏丹草青贮,中熟Sudan grass silage, medium-mature | 39.0 | 60.7 | 64.6 |
| NRC16F165 | 小黑麦豌豆混播青贮Triticale and pea mixed silage | 37.1 | 55.7 | 65.1 |
| NRC16F166 | 小黑麦青贮,成熟Triticale silage, mature | 37.2 | 58.6 | 58.5 |
| NRC16F167 | 小黑麦青贮,中熟Triticale silage, medium-mature | 34.8 | 52.2 | 57.5 |
| NRC16F174 | 小麦青贮,抽穗Wheat silage, heading stage | 35.1 | 51.1 | 61.4 |
| NRC16F175 | 小麦青贮,植株Wheat silage, plant | 37.0 | 56.6 | 59.0 |
表1 NASEM中粗饲料ADF、NDF含量及NDFD48
Table 1 ADF, NDF content and NDFD48 in NASEM
| 国际饲料编号International feed number | 饲料名称 Feed name | 酸性洗涤纤维ADF (%DM) | 中性洗涤纤维NDF (%DM) | 中性洗涤纤维48 h消化率NDFD48 (%NDF) |
|---|---|---|---|---|
| NRC6F1 | 苜蓿草Alfalfa | 33.9 | 42.9 | 49.1 |
| NRC6F33 | 冷季草,成熟Cool season grass, mature | 41.4 | 66.7 | 55.8 |
| NRC6F34 | 冷季草,中熟Cool season grass, medium-mature | 35.5 | 58.0 | 67.8 |
| NRC6F89 | 禾豆混播干草Grass and legume mixed hay | 39.3 | 58.2 | 54.5 |
| NRC6F84 | 禾豆混播干草,禾为主,中熟Grass and legume mixed hay, grass dominant, medium-mature | 33.8 | 54.7 | 67.5 |
| NRC6F86 | 禾豆混播干草,豆为主,成熟Grass and legume mixed hay, legume dominant, mature | 38.7 | 51.2 | 48.0 |
| NRC6F91 | 豆科干草,未成熟Leguminous hay, immature | 30.7 | 37.7 | 51.4 |
| NRC6F92 | 豆科干草,成熟Leguminous hay, mature | 37.2 | 46.6 | 43.4 |
| NRC6F93 | 豆科干草,中熟Leguminous hay, medium-mature | 32.1 | 41.1 | 52.4 |
| NRC6F107 | 豌豆干草Pea hay | 32.0 | 43.4 | 58.5 |
| NRC6F109 | 稻草Rice straw | 62.0 | 43.0 | 48.2 |
| NRC6F110 | 谷草Millet straw | 75.0 | 50.0 | 43.2 |
| NRC6F111 | 玉米秸秆Corn stalks | 70.8 | 46.7 | 49.3 |
| NRC6F112 | 莜麦秸Hulless oat straw | 74.0 | 49.0 | 44.4 |
| NRC6F114 | 花生秧Peanut straw | 37.9 | 45.8 | 40.1 |
| NRC6F131 | 一年生黑麦草,中熟Annual ryegrass, medium-mature | 36.7 | 57.3 | 59.8 |
| NRC6F127 | 一年生黑麦草,成熟Annual ryegrass, mature | 42.7 | 66.8 | 55.9 |
| NRC6F138 | 高粱青干草Sorghum green hay | 38.8 | 63.0 | 60.8 |
| NRC6F142 | 苏丹草Sudan grass | 39.3 | 61.0 | 54.4 |
| NRC6F143 | 黄豆草Soybean grass | 31.3 | 40.3 | 50.5 |
| NRC6F151 | 苏丹草,成熟Sudan grass, mature | 41.6 | 65.8 | 55.8 |
| NRC6F152 | 苏丹草,中熟Sudan grass, medium-mature | 36.9 | 54.6 | 56.7 |
| NRC16F164 | 小黑麦干草Triticale hay | 38.3 | 60.0 | 63.7 |
| NRC16F176 | 小麦秸秆Wheat straw | 53.1 | 76.9 | 41.8 |
| NRC16F18 | 狗牙根青贮,成熟Bermudagrass silage, mature | 42.8 | 70.8 | 52.3 |
| NRC16F19 | 狗牙根青贮,中熟Bermudagrass silage, medium-mature | 39.0 | 64.1 | 63.5 |
| NRC16F35 | 冷季草青贮Cool season grass silage | 39.0 | 62.1 | 63.6 |
| NRC16F52 | 玉米秸秆,青贮,高干物质Corn stalks, silage, high dry matter | 46.9 | 72.0 | 56.2 |
| NRC16F51 | 玉米秸秆,青贮,低干物质Corn stalks, silage, low dry matter | 44.8 | 66.2 | 52.8 |
| NRC16F90 | 草豆混播青贮Grass and beans mixed silage | 34.8 | 51.2 | 61.1 |
| NRC16F88 | 禾豆混播青贮,豆为主Grass-legume mixed silage, legume-dominant | 33.9 | 45.9 | 56.2 |
| NRC16F95 | 豆科牧草青贮,中熟Leguminous forage silage, medium-mature | 33.7 | 43.2 | 49.4 |
| NRC16F100 | 粟黍青贮Foxtail millet silage | 39.2 | 59.7 | 61.2 |
| NRC16F106 | 燕麦青贮,中熟Oat silage, medium-mature | 38.8 | 57.4 | 54.1 |
| NRC16F108 | 豌豆青贮Pea silage | 37.1 | 52.5 | 57.7 |
| NRC16F121 | 水稻青贮,带穗Rice silage with panicles | 31.8 | 41.9 | 54.2 |
| NRC16F130 | 一年生黑麦草青贮,中熟Annual ryegrass silage, medium-mature | 38.3 | 58.0 | 61.9 |
| NRC16F135 | 饲用高粱青贮,未成熟Sorghum silage, immature | 36.4 | 56.7 | 58.5 |
| NRC16F136 | 饲用高粱青贮,成熟Sorghum silage, mature | 39.2 | 61.6 | 63.6 |
| NRC16F140 | 苏丹草青贮Sudan grass silage | 38.9 | 59.5 | 54.9 |
| NRC16F154 | 苏丹草青贮,中熟Sudan grass silage, medium-mature | 39.0 | 60.7 | 64.6 |
| NRC16F165 | 小黑麦豌豆混播青贮Triticale and pea mixed silage | 37.1 | 55.7 | 65.1 |
| NRC16F166 | 小黑麦青贮,成熟Triticale silage, mature | 37.2 | 58.6 | 58.5 |
| NRC16F167 | 小黑麦青贮,中熟Triticale silage, medium-mature | 34.8 | 52.2 | 57.5 |
| NRC16F174 | 小麦青贮,抽穗Wheat silage, heading stage | 35.1 | 51.1 | 61.4 |
| NRC16F175 | 小麦青贮,植株Wheat silage, plant | 37.0 | 56.6 | 59.0 |
| 第一作者First author | 发表时间Publication time | 涉及饲草Forage |
|---|---|---|
| Oliver A L[ | 2004 | 苜蓿干草、高粱青贮Alfalfa hay, sorghum silage |
| Dann H M[ | 2008 | 高粱和苏丹草混合青贮Sorghum and sudan grass mixed silage |
| Kendall C[ | 2009 | 小麦秸秆、苜蓿青贮Wheat straw, alfalfa silage |
| Colombini S[ | 2012 | 高粱青贮Sorghum silage |
| Kammes K L[ | 2012 | 苜蓿青贮、鸭茅青贮Alfalfa silage, duck grass silage |
| Brunette T[ | 2016 | 混合牧草青贮Mixed forage silage |
| Coblentz W K[ | 2013 | 燕麦草Oat grass |
| Palmonari A[ | 2016 | 苜蓿、禾本科饲草Alfalfa, grass forage |
| Fustini M[ | 2017 | 苜蓿干草Alfalfa hay |
| Brown A N[ | 2018 | 黑麦草、小黑麦、大麦、毛苕子、三叶草Ryegrass, rye, barley, hairy roots, clover |
| Lyons S E[ | 2019 | 饲用高粱草Sorghum grass |
| Krogstad K C[ | 2021 | 苜蓿干草、小麦秸秆Alfalfa hay, wheat straw |
| Farhad P K[ | 2023 | 黑麦草、牛茅草、红三叶草、白三叶草Ryegrass, fescue, red clover, white clover |
| Stypinski J D[ | 2024 | 苜蓿干草Alfalfa hay |
表2 基于Journal of Dairy Science检索的关于饲草NDF、ADF含量及NDFD48相关文献
Table 2 Based on the Journal of Dairy Science, retrieve literature related to forage NDF, ADF content, and NDFD48
| 第一作者First author | 发表时间Publication time | 涉及饲草Forage |
|---|---|---|
| Oliver A L[ | 2004 | 苜蓿干草、高粱青贮Alfalfa hay, sorghum silage |
| Dann H M[ | 2008 | 高粱和苏丹草混合青贮Sorghum and sudan grass mixed silage |
| Kendall C[ | 2009 | 小麦秸秆、苜蓿青贮Wheat straw, alfalfa silage |
| Colombini S[ | 2012 | 高粱青贮Sorghum silage |
| Kammes K L[ | 2012 | 苜蓿青贮、鸭茅青贮Alfalfa silage, duck grass silage |
| Brunette T[ | 2016 | 混合牧草青贮Mixed forage silage |
| Coblentz W K[ | 2013 | 燕麦草Oat grass |
| Palmonari A[ | 2016 | 苜蓿、禾本科饲草Alfalfa, grass forage |
| Fustini M[ | 2017 | 苜蓿干草Alfalfa hay |
| Brown A N[ | 2018 | 黑麦草、小黑麦、大麦、毛苕子、三叶草Ryegrass, rye, barley, hairy roots, clover |
| Lyons S E[ | 2019 | 饲用高粱草Sorghum grass |
| Krogstad K C[ | 2021 | 苜蓿干草、小麦秸秆Alfalfa hay, wheat straw |
| Farhad P K[ | 2023 | 黑麦草、牛茅草、红三叶草、白三叶草Ryegrass, fescue, red clover, white clover |
| Stypinski J D[ | 2024 | 苜蓿干草Alfalfa hay |
项目 Item | 中性洗涤纤维NDF (%DM) | 酸性洗涤纤维 ADF (%DM) | 中性洗涤纤维48 h消化率 NDFD48 (%NDF) | |||
|---|---|---|---|---|---|---|
| 均值Mean | 标准差SD | 均值Mean | 标准差SD | 均值Mean | 标准差SD | |
| 豆科Legume | 41.25 | 3.96 | 30.64 | 4.05 | 59.10 | 17.63 |
| 禾豆混播Grasses and legume mixed forage | 47.50 | 1.97 | 30.49 | 1.59 | 73.15 | 4.11 |
| 禾本科Grasses | 58.36 | 5.91 | 37.25 | 5.48 | 59.87 | 10.63 |
表3 基于Journal of Dairy Science发表文献中不同饲草的NDF、ADF含量及NDFD48
Table 3 Forages NDF, ADF content, and NDFD48 in the Journal of Dairy Science
项目 Item | 中性洗涤纤维NDF (%DM) | 酸性洗涤纤维 ADF (%DM) | 中性洗涤纤维48 h消化率 NDFD48 (%NDF) | |||
|---|---|---|---|---|---|---|
| 均值Mean | 标准差SD | 均值Mean | 标准差SD | 均值Mean | 标准差SD | |
| 豆科Legume | 41.25 | 3.96 | 30.64 | 4.05 | 59.10 | 17.63 |
| 禾豆混播Grasses and legume mixed forage | 47.50 | 1.97 | 30.49 | 1.59 | 73.15 | 4.11 |
| 禾本科Grasses | 58.36 | 5.91 | 37.25 | 5.48 | 59.87 | 10.63 |
项目 Item | 中性洗涤纤维 NDF (%DM) | 酸性洗涤纤维 ADF (%DM) | 中性洗涤纤维48 h消化率 NDFD48 (%NDF) | |||
|---|---|---|---|---|---|---|
| 均值 Mean | 标准差 SD | 均值 Mean | 标准差 SD | 均值 Mean | 标准差 SD | |
| 苜蓿青贮Alfalfa silage | 39.43 | 3.86 | 32.38 | 2.79 | 50.82 | 2.85 |
| 苜蓿干草Alfalfa hay | 41.53 | 3.86 | 32.38 | 2.79 | 50.82 | 2.85 |
| 田菁Sesbania | 64.88 | 3.71 | 46.34 | 2.23 | 44.20 | 5.79 |
| 禾豆混合青贮Grasses and legume mixed silage | 56.08 | 7.33 | 37.56 | 4.91 | 56.87 | 10.17 |
表4 实测不同饲草NDF、ADF含量及NDFD48
Table 4 Laboratory testing of NDF, ADF content, and NDFD48 in different forage samples
项目 Item | 中性洗涤纤维 NDF (%DM) | 酸性洗涤纤维 ADF (%DM) | 中性洗涤纤维48 h消化率 NDFD48 (%NDF) | |||
|---|---|---|---|---|---|---|
| 均值 Mean | 标准差 SD | 均值 Mean | 标准差 SD | 均值 Mean | 标准差 SD | |
| 苜蓿青贮Alfalfa silage | 39.43 | 3.86 | 32.38 | 2.79 | 50.82 | 2.85 |
| 苜蓿干草Alfalfa hay | 41.53 | 3.86 | 32.38 | 2.79 | 50.82 | 2.85 |
| 田菁Sesbania | 64.88 | 3.71 | 46.34 | 2.23 | 44.20 | 5.79 |
| 禾豆混合青贮Grasses and legume mixed silage | 56.08 | 7.33 | 37.56 | 4.91 | 56.87 | 10.17 |
饲草品种 Forage species | 酸性洗涤纤维ADF (%DM) | 中性洗涤纤维NDF (%DM) | 中性洗涤纤维48 h消化率NDFD48 (%NDF) | 饲草品种 Forage species | 酸性洗涤纤维ADF (%DM) | 中性洗涤纤维NDF (%DM) | 中性洗涤纤维48 h消化率NDFD48 (%NDF) |
|---|---|---|---|---|---|---|---|
| 田菁Sesban | 苜蓿青贮Alfalfa silage | ||||||
| 1 | 47.28 | 61.48 | 36.79 | 22 | 27.47 | 34.56 | 56.04 |
| 2 | 50.50 | 64.39 | 36.39 | 23 | 28.11 | 35.34 | 56.16 |
| 3 | 45.33 | 59.50 | 40.12 | 24 | 27.67 | 34.38 | 59.20 |
| 4 | 47.27 | 69.28 | 46.78 | 25 | 28.03 | 34.33 | 58.28 |
| 5 | 44.04 | 62.88 | 46.25 | 26 | 33.52 | 40.83 | 45.90 |
| 6 | 47.68 | 69.20 | 41.69 | 27 | 33.51 | 41.05 | 45.79 |
| 7 | 43.73 | 62.63 | 49.98 | 28 | 31.29 | 38.67 | 48.08 |
| 8 | 45.99 | 69.77 | 51.94 | 29 | 32.08 | 39.33 | 47.67 |
| 9 | 43.56 | 67.28 | 51.15 | 30 | 32.43 | 41.26 | 51.88 |
| 10 | 48.01 | 62.38 | 40.89 | 31 | 33.86 | 42.48 | 47.48 |
| 禾豆混合青贮Grasses and legume mixed silage | 32 | 31.83 | 40.08 | 51.01 | |||
| 11 | 43.25 | 62.50 | 50.20 | 33 | 31.30 | 39.73 | 52.52 |
| 12 | 43.27 | 66.45 | 55.53 | 34 | 33.19 | 41.79 | 46.22 |
| 13 | 45.52 | 66.46 | 49.50 | 35 | 30.31 | 37.94 | 50.34 |
| 14 | 37.92 | 50.00 | 46.33 | 36 | 29.95 | 35.62 | 47.89 |
| 15 | 37.22 | 55.83 | 54.91 | 37 | 29.07 | 38.29 | 61.08 |
| 16 | 35.08 | 59.86 | 54.30 | 38 | 36.76 | 54.06 | 60.28 |
| 17 | 32.21 | 50.90 | 69.84 | 苜蓿干草Alfalfa hay | |||
| 18 | 32.76 | 51.36 | 69.86 | 39 | 37.18 | 47.80 | 45.60 |
| 19 | 32.24 | 51.85 | 72.55 | 40 | 33.54 | 41.47 | 50.03 |
| 20 | 36.20 | 45.62 | 45.68 | 41 | 32.78 | 43.89 | 53.67 |
| 21 | 32.84 | 40.00 | 49.81 | 42 | 30.04 | 38.20 | 51.58 |
| 43 | 31.00 | 40.43 | 52.79 | ||||
| 44 | 29.73 | 37.37 | 51.22 | ||||
表5 实验室实测饲草数据中粗饲料ADF、NDF含量及NDFD48
Table 5 ADF, NDF content and NDFD48 measured in the laboratory
饲草品种 Forage species | 酸性洗涤纤维ADF (%DM) | 中性洗涤纤维NDF (%DM) | 中性洗涤纤维48 h消化率NDFD48 (%NDF) | 饲草品种 Forage species | 酸性洗涤纤维ADF (%DM) | 中性洗涤纤维NDF (%DM) | 中性洗涤纤维48 h消化率NDFD48 (%NDF) |
|---|---|---|---|---|---|---|---|
| 田菁Sesban | 苜蓿青贮Alfalfa silage | ||||||
| 1 | 47.28 | 61.48 | 36.79 | 22 | 27.47 | 34.56 | 56.04 |
| 2 | 50.50 | 64.39 | 36.39 | 23 | 28.11 | 35.34 | 56.16 |
| 3 | 45.33 | 59.50 | 40.12 | 24 | 27.67 | 34.38 | 59.20 |
| 4 | 47.27 | 69.28 | 46.78 | 25 | 28.03 | 34.33 | 58.28 |
| 5 | 44.04 | 62.88 | 46.25 | 26 | 33.52 | 40.83 | 45.90 |
| 6 | 47.68 | 69.20 | 41.69 | 27 | 33.51 | 41.05 | 45.79 |
| 7 | 43.73 | 62.63 | 49.98 | 28 | 31.29 | 38.67 | 48.08 |
| 8 | 45.99 | 69.77 | 51.94 | 29 | 32.08 | 39.33 | 47.67 |
| 9 | 43.56 | 67.28 | 51.15 | 30 | 32.43 | 41.26 | 51.88 |
| 10 | 48.01 | 62.38 | 40.89 | 31 | 33.86 | 42.48 | 47.48 |
| 禾豆混合青贮Grasses and legume mixed silage | 32 | 31.83 | 40.08 | 51.01 | |||
| 11 | 43.25 | 62.50 | 50.20 | 33 | 31.30 | 39.73 | 52.52 |
| 12 | 43.27 | 66.45 | 55.53 | 34 | 33.19 | 41.79 | 46.22 |
| 13 | 45.52 | 66.46 | 49.50 | 35 | 30.31 | 37.94 | 50.34 |
| 14 | 37.92 | 50.00 | 46.33 | 36 | 29.95 | 35.62 | 47.89 |
| 15 | 37.22 | 55.83 | 54.91 | 37 | 29.07 | 38.29 | 61.08 |
| 16 | 35.08 | 59.86 | 54.30 | 38 | 36.76 | 54.06 | 60.28 |
| 17 | 32.21 | 50.90 | 69.84 | 苜蓿干草Alfalfa hay | |||
| 18 | 32.76 | 51.36 | 69.86 | 39 | 37.18 | 47.80 | 45.60 |
| 19 | 32.24 | 51.85 | 72.55 | 40 | 33.54 | 41.47 | 50.03 |
| 20 | 36.20 | 45.62 | 45.68 | 41 | 32.78 | 43.89 | 53.67 |
| 21 | 32.84 | 40.00 | 49.81 | 42 | 30.04 | 38.20 | 51.58 |
| 43 | 31.00 | 40.43 | 52.79 | ||||
| 44 | 29.73 | 37.37 | 51.22 | ||||
图1 NASEM中饲草NDF含量与NDFD48相关性实线表示最佳拟合曲线,两侧虚线为置信区间。下同。The solid line represents the best fit curve, and the dotted lines on both sides are the confidence intervals. The same below.
Fig.1 Relationship between forage NDF content and NDFD48 in NASEM
项目 Item | 线性回归Linear regression | R2 (%) | MSE | CCC | Bias | RMSEP | ||
|---|---|---|---|---|---|---|---|---|
| a | b | P值P-value | ||||||
验证集1中NDFD48 vs.模型预测NDFD48 NDFD48 in validation set 1 vs. NDFD48 predictive model | 5.26 | 0.89 | 0.0001 | 89 | 25.53 | 0.93 | 1.98 | 5.05 |
表6 基于验证集1分析NDFD48预测模型的准确性
Table 6 The accuracy of the NDFD48 predictive model based on validation set 1
项目 Item | 线性回归Linear regression | R2 (%) | MSE | CCC | Bias | RMSEP | ||
|---|---|---|---|---|---|---|---|---|
| a | b | P值P-value | ||||||
验证集1中NDFD48 vs.模型预测NDFD48 NDFD48 in validation set 1 vs. NDFD48 predictive model | 5.26 | 0.89 | 0.0001 | 89 | 25.53 | 0.93 | 1.98 | 5.05 |
| 项目Item | 线性回归Linear regression | R2 (%) | MSE | CCC | Bias | RMSEP | ||
|---|---|---|---|---|---|---|---|---|
| a | b | P值P-value | ||||||
验证集2中NDFD48 vs.模型预测NDFD48 NDFD48 in validation set 2 vs. NDFD48 predictive model | 9.74 | 0.80 | 0.0007 | 85 | 11.75 | 0.91 | 0.48 | 3.42 |
表7 基于验证集2分析NDFD48预测模型的准确性
Table 7 The accuracy of the NDFD48 predictive model based on validation set 2
| 项目Item | 线性回归Linear regression | R2 (%) | MSE | CCC | Bias | RMSEP | ||
|---|---|---|---|---|---|---|---|---|
| a | b | P值P-value | ||||||
验证集2中NDFD48 vs.模型预测NDFD48 NDFD48 in validation set 2 vs. NDFD48 predictive model | 9.74 | 0.80 | 0.0007 | 85 | 11.75 | 0.91 | 0.48 | 3.42 |
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