Protein Requirements of Cows Fed High Concentrate Rations

Gardner, Rachel; Park, R.L.

doi:10.3168/jds.s0022-0302(73)85183-5

Cited by 46 publications

(4 citation statements)

References 11 publications

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“…The results showed a linear response in milk yield to increasing CP content in the whole ration, which indicates that a CP content of at least 17 % is required in early lactation. This result agrees closely with those of Gardner & Park (1973), Sparrow et al (1973), Grieve, MacLeod & Stone (1974), Huber (1975) and Roffler et al (1978) for high-yielding cows. However, further investigations are needed as work by Thomas (1971), with cows of similar yields to those used in Expt 1, showed that a whole-ration CP content of 11-13 % was adequate for milk yields of 18-20 kg/cow/day.…”

Section: Discussionsupporting

confidence: 91%

Protein studies on maize silage as a basal ration for dairy cows

Phipps¹,

Weller²,

Smith³

et al. 1981

J. Agric. Sci.

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In Expt 1 40 lactating British Friesians, 20 cows and 20 heifers, were used to study the effect of crude protein (CP) content of the whole ration on milk yield, milk composition and live-weight change when maize silage was fed as the basal ration. There were four treatments with five cows and five heifers on each. During lactation weeks 4-12 the cows on treatments 1, 2, 3 and 4 all received 7 kg maize silage dry matter (D.M.) plus 8 kg D.M./day of a concentrate containing either 14, 18, 22 or 24% CP, respectively; heifers received 1 kg/day less of both silage and concentrate. This produced whole-ration CP contents of 11-7, 13-9, 16-0 and 17-1%. In the subsequent lactation weeks 13-20 silage feeding was increased to 9 kg D.M./cow/day and concentrate feeding decreased to 5 kg D.M./cow/day. Heifers again received 1 kg/day less of both silage and concentrate. This decreased whole-ration CP contents to 10-5, 11-7, 12-9 and 13-4%.During lactation weeks 4-12 and 13-20, with the exception of milk fat content in weeks 13-20, there were significant linear effects of whole-ration CP content on milk yield, milk fat, protein, lactose and total solids. There were no significant curvilinear relationships. Thus, despite the fact that the highest numerical values were generally recorded for the animals on treatment 3, the results indicate that a whole-ration CP content of at least 17-1 and 13-4% are required in early and mid-lactation respectively.In Expt 2 the loss of D.M., acid-detergent fibre and nitrogen from maize silage suspended in nylon bags in the rumen was measured. Compared with feeding either a low or high protein supplement, losses were greater for silage fed alone. If it is accepted that nitrogen loss can be approximated to protein degradability, then the value for maize silage was between 0-6 and 0-7. Using the same technique in Expt 3, comparable nitrogen losses for fish meal, decorticated groundnut meal and soya-bean meal were 0-3, 0-9 and 0-9, respectively, after 24 h incubation.

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Section: Discussionsupporting

confidence: 91%

Protein studies on maize silage as a basal ration for dairy cows

Phipps¹,

Weller²,

Smith³

et al. 1981

J. Agric. Sci.

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“…However, the effects of protein levels in the ratio on dairy cow performance have been inconsistent (NCR, 1978). Positive effects of protein content in the diet on milk production in ruminants have been reported in some studies (Gardner and Park, (1973); Polan et al (1976); Roffler et al, 1978 whereas other studies were unable to determine the effect on the milk yield (Van Horn et al, 1976;Kwan et al, 1977, Cunningham et al,1996Leonardi et al, 2003). Some of the ammonia produced as a result of the breakdown of nitrogenous feeds in the rumen is used in the synthesis of bacterial proteins.…”

Section: Introductionmentioning

confidence: 99%

The comparison of two different protein-containing rations (CP;17.82% vs CP;19.18%) for Anatolian water buffaloes

Degirmencioglu

2022

Buffalo Bull.

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Effects of feeding with diets (D1 and D2), Crude protein (CP) 17.82% and CP;19.18% contents on dry matter intake, milk yield, and composition were compared for 20 Anatolian Water buffaloes, distributed in two groups (T, E). Diets did not affect DM intake of concentrate and silage among buffaloes. Milk yield got improved (4.93 to 5.63 kg d-1) (P<0.05) in buffaloes fed by a diet D2 (CP;19.18%) as compared to diet D1 (CP; 17.82%). In general, D1 and D2 diets did not cause any difference in the milk compositions examined of buffaloes on the other hand, using of sunflower cake should be encouraged on the buffalo’s farm.

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“…In case of protein de ciency, animals reduce feed consumption (Değirmencioğlu, 2020).Similarly, Morrow (1976) states that cows with a high condition score in the early lactation period and fed a ration containing 15% Crude protein have a high incidence of metabolic disorders such as ketosis and anorexia, where feed consumption and milk yields are lower than expected. When the studies on the effects of different protein levels in the ration on milk yield were examined, it was seen that different results were obtained (Anonymous, 1978)..As a matter of fact, while the increase in crude protein in the ration increases milk yield in some studies (Gardner and Park., (1973), Polan et al, (1976), Ro er et al, 1978), in some studies the protein level in the ration (16.1 %-It is stated that the increase from 16.7 CP; to 18.4-18.9% CP) does not affect milk yield (Van Horn et al, 1976, Kwan et al, 1977, Cunningham et al,1996, Broderick, 2003and Leonardi et al, 2003.When the crude protein level of the ration rises, it is broken down in the rumen and used in microbial protein synthesis, the remaining ammonia passes into the blood, then turns into urea in the liver. Some of the urea is excreted in urine.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Different Levels of Protein Supplementation in Rations on Feed Consumption, Milk Yield and Milk Composition in Anatolian Buffaloes of Different Ages [Bubalus Bubalis (Iinnaeus, 1758)].

Degirmencioglu¹

2021

Preprint

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BackgroundIn this study, it was aimed to determine the optimal crude protein level in the ration for milk production and milk composition in milk buffaloes of different ages.Materials, Methods & Results A total of 20 Anatolian buffaloes were used as animal material.Buffalo cows were tested in the early lactation period (lactation period; 65-80 days).Water buffaloes are divided into four groups as young and adult; First, second groups (those who gave birth to the first), third and fourth groups (those who gave birth to the second and more).5 compartments are allocated for each group.In the trial, buffalo cows with two different trial rations R1; (17.82% CP) and R2; (19.18% CP) were fed.Especially during the experiment, the total DM consumption of adult buffaloes in group 4 and group 3 increased when compared with young buffaloes (p <0.05). As a result of the research, the milk yield values determined in milk buffaloes fed with the R2 ration were found to be higher than the values found in milk buffaloes fed with the R1 ration (6.34-5.64kg / day) (p <0.05).However, the effect of R1 and R2 rations on milk production was similar in young buffaloes (4.22-4.36 kg / day) (p> 0.05).

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Protein Requirements of Cows Fed High Concentrate Rations

Cited by 46 publications

References 11 publications

Protein studies on maize silage as a basal ration for dairy cows

Protein studies on maize silage as a basal ration for dairy cows

The comparison of two different protein-containing rations (CP;17.82% vs CP;19.18%) for Anatolian water buffaloes

The Effect of Different Levels of Protein Supplementation in Rations on Feed Consumption, Milk Yield and Milk Composition in Anatolian Buffaloes of Different Ages [Bubalus Bubalis (Iinnaeus, 1758)].

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