Milk yield and composition of primiparous recipient cows influence the performance and carcass ultrasonography of Nellore calf

Figures & data

Figure 1. Calves milk intake (kg) according to time and dam’s breed (a), milk fat (b), protein (c) and lactose (d) content (g/kg) of Nellore or Angus recipient primiparous over the lactation time.

Table 1. Milk yield, composition and performance of Nellore or Angus recipient primiparous.

Variable	Recipient breed^a		SEM	P-value
	Angus	Nellore		Breed	Time	Breed*Time
Milk intake (kg/day)	4.30	4.08	0.20	0.653	0.004	0.174
Fat correct milk^b (kg/day)	5.18	5.15	0.15	0.924	0.011	0.429
Energy correct milk^c (kg/day)	5.02	4.87	0.23	0.778	0.006	0.273
Fat (kg/day)	0.197	0.191	0.01	0.760	0.007	0.308
Protein (kg/day)	0.149	0.147	0.01	0.887	0.006	0.342
Lactose (kg/day)	0.194	0.194	0.01	0.982	0.007	0.392
Fat (g/day)	46.32	47.71	0.03	0.117	0.003	0.043
Protein (g/day)	35.32	36.82	0.02	0.021	<.0001	0.005
Lactose (g/day)	45.72	48.82	0.03	0.002	<.0001	0.005
Body score condition (g/day)	3.08	2.89	0.03	0.042	<.0001	0.887
Body Weight (kg)	399.5	374.4	3.32	0.044	<.0001	0.151

^aAngus (recipient primiparous ½ Angus-Nellore); Nellore (recipient primiparous Nellore).

^bFat correct milk: 3.5% of fat, according to NRC (2000).

^cEnergy correct milk: according to NRC (2000).

Figure 2. Body weight (a) and average daily gain (b) of Nellore calves from Nellore or Angus recipient primiparous.

Table 2. Performance and carcass ultrasound of Nellore calves of Nellore or Angus recipient primiparous.

Variable	Recipient breed^a		SEM	P-value
	Angus	Nellore		Breed	Time	Breed*Time
Body weight (kg)	131.3	114.2	3.93	0.033	<.0001	0.408
Average daily gain (kg/day)	0.913	0.815	0.02	0.031	0.039	0.680
Longissimus muscle
Area (cm^2)	40.10	34.93	1.24	0.033	–	–
Area:100kg	21.23	21.11	0.56	0.920	–	–
Height:width ratio	0.50	0.46	0.01	0.022	–	–
Back fat (mm)
Over Longissimus	2.49	2.21	0.10	0.213	–	–
Over Longissimus:100 kg	1.33	1.34	0.06	0.923	–	–
Over rump	4.45	3.95	0.23	0.289	–	–
Marbling	2.69	2.94	0.08	0.142	–	–

^aAngus (recipient primiparous ½ Angus-Nellore); Nellore (recipient primiparous Nellore).

Table 3. Pearson correlation between carcass ultrasound parameters and productive performance of calves and milk yield and composition of Nellore or Angus recipients primiparous.

Variable	LMA100	Ratio	MAR	BFL	BFL100	BFR	MI	Fat	Protein	Lactose	ADG	BW
LMA	0.164	0.376	0.199	0.316	–0.249	0.333	0.118*	–0.352	–0.347	–0.409	0.519**	0.722**
LMA100		–0.351	0.177	–0.110	0.361	–0.161	0.289*	–0.019	0.063	0.093	–0.166*	–0.527*
Ratio			–0.109	0.338	–0.064	0.428	0.262	–0.136	–0.235	–0.286	0.544*	0.591*
MAR				0.188	0.138	0.375	–0.227	0.840*	0.860*	0.885*	–0.457	0.011
BFL					0.661	0.657	0.062	0.057	–0.050	–0.161	0.004	0.396*
BFL100						0.295	–0.149	0.254	0.191	0.147	–0.405	−0.389
BFR							–0.143	0.225	0.124	0.079	–0.011	0.456
MI								–0.460*	–0.516*	–0.513*	0.402**	0.344**
Fat									0.942**	0.871**	0.540	–0.293
Protein										0.966**	–0.592	–0.348
Lactose											–0.622	–0.419
ADG												0.524**

LMA = Longissimus muscle area; LMA 100 = LMA/100 kg of BW; Ratio = Longissimus muscle height:width ratio; MAR = marbling; BFL = Back fat thickness over Longissimus; BFL 100 = Back fat thickness over Longissimus/100 kg of body weight; BFR = Back fat thickness over the rump (Biceps femoris); MI = milk intake; Fat = milk fat content; Protein = milk protein content; Lactose = milk lactose content; ADG = average dairy gain.

*P < .05; **P < .001.

NRC . 2000. Nutrient requirements of beef cattle. 7th revised ed.: Update 2000.

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