肉用绵羊生长期甲烷排放特点与预测模型的建立

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3 甲烷排放量与营养物质含量的回归分析

Table 3 The methane models regressed to nutrient composition of the diets

回归模型 Regression models		R²	P值
CH₄ (L·d^-1)	= 4.25 × NDF% - 134.17	0.691	<0.001
	= -56.79 × GE (MJ·kg^-1) + 1077.19	0.768	<0.001
	= -26.59 × NFC/NDF + 92.70	0.772	<0.001
	=207.15 × NDF/OM% - 34.17 × GE (MJ·kg^-1) + 567.82	0.823	<0.001
48-55 kg
CH₄(L·d^-1)	= 2.92 × NDF (%) - 80.07	0.201	0.124
	= -57.00 × GE (MJ·kg^-1) + 1076.01	0.581	0.002
	= -26.56 × NFC/NDF + 87.73	0.577	0.003
	= -2.31 × NDF/OM (%) - 79.12 × GE (MJ·kg^-1) + 1587.73	0.638	0.006
25-55 kg
CH₄(L·d^-1)	= 3.704× NDF (%) - 112.25	0.395	0.001
	= -57.33 × GE (MJ·kg^-1) + 1084.12	0.655	<0.001
	= -26.94 × NFC/NDF + 90.72	0.655	<0.001
	= -0.082 × NDF/OM (%) - 58.14 × GE (MJ·kg^-1) + 1102.89	0.655	<0.001