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5 甲烷日产量与采食量、可消化营养物质摄入量及营养物质表观消化率的回归关系
Table 5 Regression relationship between the daily methane and nutrients intake, digestive nutrients intake, apparent digestibility of nutrients
回归模型 Regression models R2 P
25-35 kg
CH4(L·d-1) = 0.12 × NDFI (g) - 18.50 0.634 0.001
= 0.15 × DNDF (g) + 10.68 0.411 0.008
= -1.12 × CPD+ 113.60 0.317 0.045
= 0.22 × NDFI (g) - 0.072 × DMI (g) + 21.79 0.675 0.004
= 0.31 × DNDF (g) - 0.19 × DOM (g) + 106.45 0.661 0.004
= 2.66 × NDFD - 3.56 × DMD + 147.08 0.805 <0.001
= -0.016 × NDFI (g) - 1.49 × CPI (g) + 0.16 × DMI (g) + 45.83 0.826 0.001
= 0.17 × DNDF (g) + 0.001 × DDM (g) - 0.95 × DCP (g) + 66.88 0.819 0.001
= 2.71 × NDFD - 2.45 × DMD - 0.97 × CPD + 124.46 0.846 0.001
48-55 kg
CH4(L·d-1) = 0.18 × NDFI(g) - 47.63 0.452 0.012
= 0.20 × DNDF(g) + 7.06 0.188 0.139
= -1.47 × CPD + 131.61 0.343 0.036
= 0.26 × NDFI(g) - 0.043 × DMI(g) - 36.53 0.476 0.04
= 0.19 × DNDF(g) + 0.019 × DOM(g) - 16.92 0.193 0.342
= 0.46 × NDFD - 2.97 × DMD + 215.98 0.329 0.136
= -0.24 × NDFI(g) + 0.38 × DMI(g)-2.43 × CPI(g) + 15.77 0.647 0.02
= 0.048 × DNDF(g) - 1.72 × DCP(g)+0.21 × DDM(g) - 12.93 0.638 0.022
= 0.40 × NDFD - 1.04 × DMD - 1.12 × CPD + 157.89 0.356 0.245
25-55 kg
CH4(L·d-1) = 0.12 × NDFI(g) - 19.49 0.502 <0.001
= 0.17 × DNDF(g) + 4.54 0.300 0.004
= -1.29 × CPD + 122.17 0.351 0.001
= 0.19 × NDFI(g) - 0.044 × DMI(g) - 2.55 0.526 <0.001
= 0.19 × DNDF(g) - 0.02 × DDM(g) + 15.24 0.306 0.015
= 1.27 × NDFD - 2.93 × DMD + 174.29 0.414 0.002
= -0.14 × NDFI(g) + 0.27 × DMI(g) - 1.91 × CPI(g) + 19.89 0.708 <0.001
= 0.072 × DNDF(g) + 0.13 × DDM(g) - 1.31 × DCP(g) + 17.86 0.648 <0.001
= 1.30 × NDFD - 1.21 × CPD - 1.29 × DMD + 132.99 0.471 0.003