实验方法 Experimental Methods

利用体外产气法研究饲粮中性洗涤纤维/淀粉对瘤胃甲烷产量的影响

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  • 河北农业大学动物科技学院, 保定 071001
王增林(1992-),男,河北保定人,硕士研究生,从事动物营养与饲料科学研究。E-mail:18233322293@163.com

收稿日期: 2018-12-23

  网络出版日期: 2019-07-19

基金资助

河北省现代产业技术体系肉牛创新团队(HBCT2018130202);河北省科技厅科研专项(172276225D);国家现代农业产业技术体系(CARS-37)

Effects of Dietary Neutral Detergent Fiber to Starch Ratio on Methane Production Using in Vitro Gas Production Technique

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  • College of Animal Science and Technology, Hebei Agriculture University, Baoding 071001, China

Received date: 2018-12-23

  Online published: 2019-07-19

摘要

本试验旨在利用体外产气法研究饲粮中性洗涤纤维(NDF)/淀粉对瘤胃甲烷产量的影响,确定饲粮NDF/淀粉的最佳比值。本试验采用单因素试验设计,饲粮NDF/淀粉分别设为0.8、0.9、1.0、1.1、1.2、1.3、1.4、1.5、1.6、1.7、1.8、1.9、2.0、2.2、2.3,共15个处理,每个处理5个重复,分析饲粮NDF/淀粉对瘤胃24和48 h产气量、甲烷浓度、甲烷产量的影响。结果表明:1)饲粮NDF/淀粉为0.8~1.2时,产气量高,甲烷产量低。饲粮NDF/淀粉为1.2时,24和48 h甲烷产量最低。2)各饲粮NDF/淀粉对产气量、甲烷浓度和甲烷产量均存在显著或极显著影响(P<0.05或P<0.01)。3)由线性回归分析可知,饲粮NDF/淀粉对24和48 h的甲烷浓度和甲烷产量呈极显著正相关关系(P<0.01),与24和48 h产气量呈极显著负相关关系(P<0.01)。4)由线性回归分析可知,24 h甲烷产量与乙酸/丙酸呈显著正相关关系(P<0.05)。48 h甲烷产量与24 h甲烷产量、48 h甲烷浓度呈极显著正相关关系(P<0.01)。饲粮NDF/淀粉与氨态氮(NH3-N)浓度呈极显著负相关关系(P<0.01)。24和48 h甲烷产量、饲粮NDF/淀粉与体外参数具有强相关关系,相关系数分别为0.942、0.982和0.975。综上所述,饲粮NDF/淀粉介于0.8~1.2甲烷减排效果较好。本试验条件下,饲粮NDF/淀粉为1.2对甲烷减排效果最佳。饲粮NDF/淀粉可以作为预测饲粮体外发酵甲烷产量的指标。

本文引用格式

王增林, 孙雪丽, 刘桃桃, 李秋凤, 曹玉凤, 牛健康, 王美美, 陈攀亮, 白大洋 . 利用体外产气法研究饲粮中性洗涤纤维/淀粉对瘤胃甲烷产量的影响[J]. 动物营养学报, 2019 , 31(7) : 3251 -3259 . DOI: 10.3969/j.issn.1006-267x.2019.07.037

Abstract

This experiment was conducted to study the effects of dietary neutral detergent fiber to starch ratio (NDF/starch) on rumen methane production using in vitro gas production technique. The single factor experiment was screened for the optimal NDF/starch. The NDF/starch in 15 treatments were 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.2 and 2.3, with 5 replicates in each treatment, respectively. In vitro gas production method was performed to analyze gas production, methane concentration and methane production at 24 and 48 h. The results showed as follows:1) the gas production of dietary NDF/starch between 0.8 and 1.2 was higher, methane production was lower. The methane yield of dietary NDF/starch of 1.2 was the lowest. 2) Dietary NDF and starch at different ratios had significant effects on gas production, methane concentration and methane production (P<0.05 or P<0.01). 3) The linear regression analysis showed that significantly positive relationships were found between dietary NDF/starch and the methane concentration and production at 24 and 48 h (P<0.01), and significantly negative relationships were found between dietary NDF/starch and the gas production at 24 and 48 h (P<0.01). 4) The linear regression analysis showed that significantly positive relationships was found between the methane production at 24 h and acetic acid/propionic acid (P<0.05). It was showed that significantly positive relationships were found between the methane production at 24 and 48 h, the methane concentration at 48 h. Significantly negative relationships were found between dietary NDF/starch and ammonia nitrogen (NH3-N) concentration (P<0.01). The methane production at 24 and 48 h, dietary NDF/starch were strongly related to parameters in vitro, regression coefficients were 0.942, 0.982 and 0.975, respectively. It is concluded that dietary NDF/starch between 0.8 and 1.2 can promote methane emission reduction, and the effect is the best when dietary NDF/starch is 1.2 under the present experimental conditions. The high regression coefficients indicate that in vitro methane production can be predicted merely based dietary NDF/starch.

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