肉用绵羊生长期甲烷排放特点与预测模型的建立

周艳,董利锋,邓凯东,许贵善,刁其玉

Development of Models of Methane Emissions from Growing Sheep

ZHOU Yan,DONG LiFeng,DENG KaiDong,XU GuiShan,DIAO QiYu

表6 单位代谢体重的甲烷产量与采食量、可消化营养物质摄入量及营养物质表观消化率的回归分析

Table 6 Regression relationship between the methane per metabolic body weight and nutrients intake, digestive nutrients intake, apparent digestibility of nutrients

回归模型 Regression models R2 P值 25-35 kg CH4/BW0.75(L·kg-0.75) = 0.008 × NDFI(g) - 1.36 0.605 0.002 = 0.01 × DNDF(g) + 0.81 0.380 0.025 = 0.017 × NDFI(g) - 0.006 × DMI(g) + 2.03 0.658 0.005 = 0.023 × DNDF(g) - 0.014 × DOM(g) + 8.25 0.656 0.005 = 0.19 × NDFD - 0.26 × DMD + 10.76 0.777 0.001 = 0.011 × DMI(g) - 0.11 × CPI(g) + 3.85 0.810 <0.001 = 0.013 × DNDF(g) - 0.001 × DDM(g) - 0.068 × DCP(g) + 5.38 0.792 0.002 = 0.19 × NDFD - 0.18 × DMD - 0.066 × CPD + 9.20 0.812 0.001 48-55 kg CH4/BW0.75(L·kg-0.75) = 0.010 × NDFI(g) - 2.62 0.454 0.012 = 0.011 × DNDF(g) - 0.48 0.196 0.13 = -0.079 × CPD + 7.05 0.335 0.038 = 0.014 × NDFI(g) - 0.002 × DMI(g) - 2.11 0.477 0.039 = 0.011 × DNDF(g) + 0.001 × DOM(g) - 0.98 0.201 0.326 = 0.028 × NDFD - 0.16 × DMD + 11.72 0.335 0.13 = -0.013 × NDFI(g) - 0.133 × CPI(g) + 0.021 × DMI(g) + 0.84 0.652 0.019 = 0.003 × DNDF(g) - 0.091 × DCP(g) + 0.011 × DDM(g) - 0.77 0.629 0.025 = 0.025 × NDFD - 0.051 × CPD - 0.075 × DMD + 9.06 0.354 0.248 25-55 kg CH4/BW0.75(L·kg-0.75) = 0.010 × NDFI(g) - 2.53 0.632 <0.001 = 0.013 × DNDF(g) - 0.51 0.364 0.001 = -0.098 × CPD + 8.56 0.383 0.001 = 0.012 × NDFI(g) - 0.001 × DMI(g) - 1.95 0.637 <0.001 = 0.013 × DNDF(g) + 0.000 × DDM(g) - 0.67 0.364 0.005 = 0.083 × NDFD - 0.21 × DMD + 12.17 0.401 0.003 = 0.014 × DMI(g) - 0.004 × NDFI(g) - 0.094 × CPI(g) - 0.86 0.721 <0.001 = 0.005 × DNDF(g) + 0.011 × DDM(g) - 0.097 × DCP(g) - 4.78 0.722 <0.001 = 0.086 × NDFD - 0.10 × CPD - 0.064 × DMD + 8.62 0.481 0.002