Tag Archives: milk composition

xxx A.S. Ribeiro, A.J.V. Pires, D.C. Santos, M.L.P. Albuquerque, F.F. Silva, I.C. Dutra, S.S. Amorim, P.C.S. Galvao, M.L.S. Santos, M.V. Amaral, P.P.P. Publio and G.R.S. liveira
Productive and feeding performance of dairy cows fed sugarcane bagasse ammoniated with urea and cottonseed
Abstract |

Productive and feeding performance of dairy cows fed sugarcane bagasse ammoniated with urea and cottonseed

A.S. Ribeiro*, A.J.V. Pires, D.C. Santos, M.L.P. Albuquerque, F.F. Silva, I.C. Dutra, S.S. Amorim, P.C.S. Galvao, M.L.S. Santos, M.V. Amaral, P.P.P. Publio and G.R.S. liveira

State University of Southwest of Bahia, BR45700-000, Itapetinga, Bahia, Brazil
*Correspondence: amanda.s.ri@hotmail.com

Abstract:

The objective was to evaluate the use of ammoniated sugarcane bagasse (ASB) and cottonseed (CS) in the diet for lactating cows and their effects on intake, nutrient digestibility, dairy performance, microbial synthesis and ingestive behavior. The experiment was carried out at Bela Vista Farm (Encruzilhada-BA) and at the Forage and Pasture Laboratory of UESB (Itapetinga-BA), using eight multiparous ½ Holstein/Zebu crossbred cows with an average lactation of 20 kg day-1 and body weight of 454.7 ± 23.6 kg. The cows were distributed in two 4×4 Latin squares, in a 2×2 factorial scheme, evaluating ammoniated sugarcane bagasse (30% or 40%) associated or not with cottonseed (0% or 18%). The experiment had four periods of 21 days, 17 of adaptation and 4 of collection, totaling 84 days. The interaction between the proportions of ASB and CS was not significant for any of the variables evaluated. The inclusion of 30% sugarcane bagasse obtained from sugarcane bagasse resulted in higher intakes of dry matter (DM), crude protein (CP), ether extract (EE), non-fibrous carbohydrates (NFC), and total digestible nutrients (TDN), without influencing the consumption of neutral detergent fiber corrected for ash and protein. Higher intake (P < 0.05) of DM, CP, NFC, and TDN was observed in the diet without sugarcane bagasse, and in the diet with sugarcane bagasse, EE intake was higher (P < 0.05). The ASB content and the inclusion of CS influenced digestibility at 40% ASB, and with CS, they provided lower digestibility. Furthermore, individual factors did not affect these variables (P < 0.05). Feed efficiency and percentage of total solids in milk were higher for diets with 40% ASB. The use of 40% ASB with CS is recommended.

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1278-1292 Xh. Ramadani, A. Kryeziu, M. Kamberi and M. Zogaj
Influence of altitude and lactation period on composition and physical properties of milk in crossbred Sharri sheep
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Influence of altitude and lactation period on composition and physical properties of milk in crossbred Sharri sheep

Xh. Ramadani¹, A. Kryeziu²*, M. Kamberi² and M. Zogaj³

¹University of Prishtina ‘Hasan Prishtina’, Faculty of Agriculture and Veterinary, Department of Food Technology with Biotechnology, Street Lidhja e Pejës 34, XK10000 Prishtinë, Kosovo
²University of Prishtina ‘Hasan Prishtina’, Faculty of Agriculture and Veterinary, Department of Biotechnology in Animal Science, Street Lidhja e Pejës 34, XK10000 Prishtinë, Kosovo
³University of Prishtina ‘Hasan Prishtina’, Faculty of Agriculture and Veterinary, Department of Plant Production, Street Lidhja e Pejës 34, XK10000 Prishtinë, Kosovo
*Correspondence: alltane.kryeziu@uni-pr.edu

Abstract:

The aim of this study was to compare the changes in chemical composition and physical properties of raw milk from crossbred ‘Sharri’ sheep as a function of altitude (1,200 m – variant A and 1,600 m – variant B) and lactation period. Milk composition (total solids – TS, milk fat–MF, solids non-fat-SNF, protein – P, lactose – L, ash, freezing point – FP, titratable acidity – TA, active acidity – AA, and density – D) were analysed once per month during the period of June, July, August, and September of 2021. Sheep milk at 1,600 m altitude showed significantly higher values (P < 0.05) for all analysed parameters and lower values for FP compared to milk from 1,200 m altitude, except SNF, FP and AA, which were not statistically significant. The analysed milk during the four months of lactation period has significantly increased (P < 0.05) in TS (from 15.65 to 25.46%); MF (6.49 to 10.80%); SNF (9.16 to 14.66%); P (4.46 to 6.94%); L (3.96 to 6.52%); ash (0.74 to 1.20%); TA (9.90 to 14.53 °SH); whereas changes in FP value (-0.611 to -0.709 °C), AA (6.68 to 6.76) and D (1.035 to 1.053 g cm-3), have been statistically non-significant. The interactions between altitude*lactation period on milk composition (TS, MF, SNF, P, L, ash) of crossbred ‘Sharri’ sheep and physical properties (FP, TA, AA and D) were nonsignificant.

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576–584 I. Šematoviča,, I. Eihvalde and D. Kairiša
Reticulo-ruminal pH and temperature relationship between dairy cow productivity and milk composition
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Reticulo-ruminal pH and temperature relationship between dairy cow productivity and milk composition

I. Šematoviča¹,*, I. Eihvalde² and D. Kairiša²

¹ Latvia University of Agriculture, Faculty of Veterinary Medicine, Clinical Institute, Kr. Helmana street 8, LV-3004 Jelgava, Latvia
² Latvia University of Agriculture, Faculty of Agriculture, Institute of Agrobiotechnology, Liela street 2, LV-3001 Jelgava, Latvia
*Correspondence: isem@inbox.lv

Abstract:

The aim of the research was to establish interrelations between reticulo-ruminal pH and temperature, cows’ productivity and milk composition (milk fat, protein, lactose, somatic cell count and electrical conductivity of milk) by using specific SmaXtec reticulo-ruminal boluses. In the research were included four different age dairy cows in early lactation period. The reticuloruminal pH and temperature was measured every 600 sec. over a 79 day period. The milk yield and quality was registered three times per day with automated data recording and management system Afmilk. Results showed that reticulo-ruminal temperature brightly demonstrates cow drinking behaviour and did not influence any of the investigated milk parameters. There was established a weak, statistically significant correlation between reticulo-ruminal pH and energetically corrected milk (r = 0.19; P < 0.01), milk protein level (r = 0.35) and a weak negative correlation between milk fat/protein ratio (r = − 0.22; P < 0.01). No relation between reticuloruminal pH, milk somatic cell count and milk electroconductivity was observed. Reticulo-ruminal pH fluctuations were at individual ranges for each cow without affecting an individual milk fat/protein ratio despite all of them received the same ration. It seems that milk fat/protein ratio is primarily dependent on the feed composition and properties. In the study was included one cow whose reticulo-ruminal pH was decreased below 5.7 for 400 min. in a day, and it had not had any individual effect on milk fat/protein ratio. That fact indicates to an individual cow tolerance to subacute rumen acidosis.

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