Characterization and mitigation option of greenhouse gas emissions from lactating Holstein dairy cows in East China

Table 8 Lactation performance of lactating Holstein dairy cows with different total milk solids yields¹

Items²	LTMSY	MTMSY	HTMSY	SEM	P-value
Total milk solid yield, g/d	3789^c	4714^b	5512^a	20.3	0.031
Milk yield, kg/d	31.0^c	37.6^b	44.5^a	2.36	0.021
Milk fat, %	3.74	3.73	3.73	0.20	0.916
Milk protein, %	3.27	3.31	3.29	0.22	0.871
Total milk solids, %	12.4	12.6	12.4	0.86	0.893
FCM yield, kg/d	29.5^c	36.0^b	42.7^a	2.34	0.036
ECM yield, kg/d	29.9^c	36.9^b	43.6^a	2.35	0.041

¹LTMSY low total milk solids yield (< 4325, n = 33); MTMSY medium total milk solids yield (4325–5115, n = 39); HTMSY high total milk solids yield (> 5115, n = 39); n, number of observations in the data set
²FCM Fat-corrected milk (kg/d) = 0.4 × milk yield (kg/d) + 15 × fat yield (kg/d). ECM Energy-corrected milk (kg/d) = milk yield (kg/d) × [(38.3 × fat (%) × 10 + 24.2 × protein (%) × 10 + 16.54 × lactose (%) × 10 + 20.7) ÷ 3140]
^a-cMeans in the same row with different superscripts are significantly different (P < 0.05)

ISSN: 2049-1891