Dietary grain source and oil supplement: Feeding behavior and lactational performance of Holstein cows

Kargar, S.; Ghorbani, G.R.; Khorvash, M.; Kamalian, E.; Schingoethe, D.J.

doi:10.1016/j.livsci.2013.08.007

Cited by 21 publications

(57 citation statements)

References 35 publications

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“…Overton et al (1995) but not Khorasani et al (2001) reported that milk fat percentage was affected quadratically by the proportion of barley grain and corn grain in the diets, such that the percentage of fat was greatest when diets contained barley grain and corn grain in ratios of 100:0 and 0:100 and was lowest when blends of barley grain and corn grain were fed to cows. In our recent experiment (Kargar et al, 2013), cows fed barley-based diets tended to increase DMI and had numerically greater milk yield compared with cows fed corn-based diets. Furthermore, grain type did not affect milk fat concentration and yield (Kargar et al, 2013).…”

Section: Introductionmentioning

confidence: 71%

“…In our recent experiment (Kargar et al, 2013), cows fed barley-based diets tended to increase DMI and had numerically greater milk yield compared with cows fed corn-based diets. Furthermore, grain type did not affect milk fat concentration and yield (Kargar et al, 2013). Increasing ruminal digestion of starch can increase milk yield through increased total-tract digestibility of feed and increased microbial protein synthesis, if acidosis is avoided with sufficient concentration of physically effective fiber in the diet (Allen, 2000;Beauchemin and Yang, 2006).…”

Section: Introductionmentioning

confidence: 71%

“…Feed intake is a function of both meal size and intermeal interval, determined by satiety and hunger, respectively (Allen, 2000;Kargar et al, 2013). Type of grain and its starch susceptibility to ruminal digestion has a contradictory effect on meal patterns (Oba and Allen, 2003;Kargar et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Type of grain and its starch susceptibility to ruminal digestion has a contradictory effect on meal patterns (Oba and Allen, 2003;Kargar et al, 2013). Diets high in ruminally degraded starch (e.g., high-moisture corn grain vs. dry corn grain) decreased DMI by decreasing meal size without affecting milk yield and ruminating time (Oba and Allen, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Diets high in ruminally degraded starch (e.g., high-moisture corn grain vs. dry corn grain) decreased DMI by decreasing meal size without affecting milk yield and ruminating time (Oba and Allen, 2003). However, barley-based diets (BBD) increased ruminating time by increasing rumination duration compared with corn-based diets (CBD; Kargar et al, 2013). Therefore, investigation of feeding behavior when cows are fed diets containing grains differing in expected ruminal fermentability is required to clarify regulation mechanisms for feed intake.…”

Section: Introductionmentioning

confidence: 99%

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Reciprocal combinations of barley and corn grains in oil-supplemented diets: Feeding behavior and milk yield of lactating cows

Kargar

Ghorbani

Khorvash

et al. 2014

Journal of Dairy Science

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The effect of barley-based (BBD) or corn-based diets (CBD), or their equal blend (BCBD) on dry matter (DM) intake, feeding and chewing behavior, and production performance of lactating dairy cows was evaluated. Nine multiparous Holstein cows (75.6 ± 11.0 d in milk) were used in a triplicate 3 × 3 Latin square design with 21-d periods. Forage-to-concentrate ratio (40:60), forage neutral detergent fiber (20% of DM), total neutral detergent fiber (>29% of DM), and geometric mean particle size (4.3mm) were similar among treatments. Meal patterns, including meal size and intermeal interval, were not affected by the dietary treatments and DM intake (25.6 kg/d) was not different among treatments. Ether extract intake increased linearly with increasing amount of the corn grain in the diets. Due to similar feed intake, actual milk (48.6 kg/d), 4% fat-corrected milk (36.8 kg/d), and fat- and protein-corrected milk (38.1 kg/d) yields were not affected by treatments. Average milk protein percentage and yield were 2.83% and 1.37 kg/d, respectively, and were not different across treatments. Milk fat percentage increased linearly with increasing amount of corn grain in the diets and was greater in CBD relative to BCBD but not BBD (2.31, 2.28, and 2.57%, for BBD, BCBD, and CBD, respectively). However, milk fat yield tended to show a linear increase as the amount of corn grain included in the diets increased. Results indicated that changing diet fermentability by replacing barley grain for corn grain in oil-supplemented diets did not influence feeding patterns and thereby no changes in feed intake and milk yield occurred.

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Section: Introductionmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reciprocal combinations of barley and corn grains in oil-supplemented diets: Feeding behavior and milk yield of lactating cows

Kargar

Ghorbani

Khorvash

et al. 2014

Journal of Dairy Science

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The effects of the ratio of pellets of wheat and barley grains to ground corn grain in the diet on sorting and chewing activities of heat stressed dairy cows

Nasrollahi

Zali

Ghorbani

et al. 2021

Veterinary Medicine & Sci

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Background Normal feeding behaviours is one of the criteria of the health condition of dairy cows particularly in the condition of heat stress. Objective The study evaluated the effects of the ratio of pellets of wheat and barley grains to ground corn grain on sorting activity and chewing behaviour of lactating dairy cows managed under ambient conditions including natural heat stress events. Materials and Methods Nine multiparous cows (650 ± 56 kg Body Weight; mean ± SD) averaging 102 ± 13 days in milk and producing 54 ± 6 kg/d were randomly assigned to a triplicate 3 × 3 Latin square. During each 21‐d period, cows received one of three total mixed rations as dietary treatments. The dietary treatments were three ratio of pellets (containing 50% ground wheat and 50% ground barley): ground corn on a dry matter (DM) basis: 1) 33.3:66.6 (low); 2) 66.6:33.3 (medium); and 3) 100:0 (high). During the experiment, the ambient temperature‐humidity index was equal or more than 72, indicating that the cows were predisposed to heat stress condition. Results Increasing the proportion of wheat‐barley pellets in the diet had a minimal effect on sorting index of different particles during the first 6 h of the day. However, later in the day (6‐18h), sorting against long particles (particles >19 mm) and in favour of fine particles (particles <1.18 mm) linearly increased with increasing the proportion of pellet; as a result overall daily sorting against long particles was increased with increasing the proportion of pellets. Although the average of daily eating and rumination was not affected by the treatments in the day times with high ambient THI, time spent for eating and rumination was low and eating time had more fluctuation for diet contained a high level of pellets. Conclusion Increasing the proportion of pellets of barley and wheat grains in the diet under conditions of heat stress caused more fluctuation in daily eating behaviour and cows were predisposed to sort against long particles.

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Influence of reducing starch in the diets with similar protein and energy contents on lactation performance, ruminal fermentation, digestibility, behaviour and blood metabolites in primiparous and multiparous dairy cows

Akhlaghi

Ghasemi

Alikhani

et al. 2022

Veterinary Medicine & Sci

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Background It is not clearly known whether parity can affect the outcomes of starch reduction in the diet of lactating dairy cows. Introduction A 2 × 2 factorial study was conducted to evaluate the effects of reducing starch in the diets with similar protein and energy contents on lactation performance, ruminal fermentation, nutrient digestibility, behaviour and blood metabolites in primiparous (PP) and multiparous (MP) dairy cows. Methods Twenty PP cows (DIM = 37 ± 10; 40 ± 5 kg/day of milk; mean ± SD) and 20 MP cows (DIM = 37 ± 9; 48 ± 5 kg/day of milk) were used in present study. Treatments were a factorial arrangement of two levels of starch (high vs. low) and two parity categories (PP vs. MP): (1) high‐starch diet (29.2% ± 0.70) and PP cows (HS‐PP); (2) low‐starch diet (22.3% ± 0.52) and PP cows (LS‐PP); (3) high‐starch diet and MP cows (HS‐MP) and (4) low‐starch diet and MP cows (LS‐MP). All diets were formulated to be similar in crude protein (16.1 % of dry matter) and NEL (1.60 Mcal/kg of dry matter) contents. The amount of metabolise protein was 2688 g/day in high‐starch diet and 2728 g/day in low‐starch diet. The experiment was conducted over two consecutive periods and included 4 weeks for adaptation and 3 weeks for data collection. Results Dry matter intake and the yield of milk true protein and lactose increased but milk fat: protein ratio and nutrient digestibility decreased for cows fed the HS diets compared with the LS diets. The ruminal proportion of propionate was greater but acetate, the acetate to propionate ratio and sorting against long particles (19 and 8 mm) were lower for cows fed the HS diets than the LS diets. Multiparous cows had a greater nutrient intake and milk yield, longer rumination meal length, greater BW, but lower plasma total antioxidant capacity, non‐esterified fatty acids, faeces pH compared with PP cows. An interaction between parity and the dietary level of starch was detected on feed efficiency measured as FCM yield/DMI in the way that only within PP cows low‐starch diet was more efficient than HS diets. We found another interaction effect of parity × starch on back fat thickens (BFT) change in the way that only within PP cows BFT change was greater for HS compared with LS diet. Conclusion Overall, regardless of the benefit derived from feeding a reduced‐starch diet by partially replacing grains with sugar beet pulp in the diets on nutrient digestibility, a reduced‐starch diet may be used more efficiently in PP than in MP cows but at expense of body reserves (i.e. BFT) loses.

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Dietary grain source and oil supplement: Feeding behavior and lactational performance of Holstein cows

Cited by 21 publications

References 35 publications

Reciprocal combinations of barley and corn grains in oil-supplemented diets: Feeding behavior and milk yield of lactating cows

Reciprocal combinations of barley and corn grains in oil-supplemented diets: Feeding behavior and milk yield of lactating cows

The effects of the ratio of pellets of wheat and barley grains to ground corn grain in the diet on sorting and chewing activities of heat stressed dairy cows

Influence of reducing starch in the diets with similar protein and energy contents on lactation performance, ruminal fermentation, digestibility, behaviour and blood metabolites in primiparous and multiparous dairy cows

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