STUDY OF THE IMPACT OF THE USE OF A NEW DOUBLE CHAMBER TEAT CUP ON THE FUNCTION OF THE MAMMARY GLAND OF COWS
УДК: 637.115 DOI: 10.31588/2413_4201_1883_2_258_65
Keywords:
vacuum, teat cup, teat cup liner, bump stroke, energy, milk yieldAbstract
For the purpose to protect the udder of cows from low pressure during milking, a new teat cup has been developed. A new teat cup has been developed. In the lower part of the nipple chamber of the milking cup, in its diametrical plane, there is a plate with flat parallel side surfaces, expanding the nipple tube on each side, changing the volume of the interwall and nipple chambers and sealing the latter in the compression stroke: 30±2 mm long, 18±2 mm width. The plate is made of a material that does not interact with the ingredients of milk, rectangular or trapezoidal shape with a thickness of 4±1 mm. The proposed cup works at a working vacuum in the range of 0.49-0.54 kgf/cm². The optimal pulsation frequency was set at 60±1 and the ratio of cycles: sucking - 60% and compression -- 40 % in time. The two-chamber teat cup includes a cylindrical body with an alternating vacuum pipe and a truncated cone-shaped recess in the lower part for fixing the teat tube. The suction cup of the teat tube and the annular thickening of the cup in the upper part and the recess in the form of a truncated cone, together with the annular protrusion of the inspection cone in the lower part, seal the suction chamber. As a result of the experiment, it was found that when using a new two-chamber teat cup, the milking time of the cows of the experimental group was significantly reduced from 8.5 to 4.5 minutes, the milk flow rate increased from 1.8 to 3.6 kg/min. Reducing the milking time of the cows of the experimental group led to a significant improvement in the condition of their udders: the number of somatic cells in milk decreased from 330 to 237 thousand/cm³. Milking cows with the proposed teat cup results in 0.2% increase in the mass fraction of fat in milk. The milking time of a cow decreases, the milk flow rate increases, the number of somatic cells in milk decreases.
References
Головань В. Т. Устройство для сборки и разборки двухкамерного доильного стакана / В. Т. Головань, В. Н. Александров, А. Л. Туманян // Патент. РФ № 2238641. -- 2004. -- Бюл. № 30.
Шулятьев, В. Н. Анализ доильных аппаратов с регулируемыми рабочими параметрами и предпосылки создания адаптивного доильного аппарата / В. Н. Шулятьев, А. А. Рылов, С. Н. Рылов // Материалы XVI Международной научно-практической конференции Наука -- Технология -- Ресурсосбережение. -- 2023. -- С. 114-117.
Bade, R. D. Interactions of vacuum, b-phase duration, and liner compression on milk flow rates in dairy cows / R. D. Bade, D. J. Reinemann, M. Zucali, P. L. Ruegg // Journal of Dairy Science. -- 2009. -- Vol. 92(3). -- P. 913-921. -- DOI: 10.3168/jds.2008-1180
Martin, L. M. Evaluation of inner teat morphology by using high-resolution ultrasound: Changes due to milking and establishment of measurement traits of the distal teat canal / L. M. Martin, C. Stöcker, H. Sauerwein, W. Büscher // Journal of Dairy Science, 2018. -- Vol. 101(9). -- P. 8417-8428. -- DOI: 10.3168/jds.2018-14500
Odorcic, M. Short communication: Teat wall diameter and teat tissue thickness in dairy cows are affected by intramammary pressure and by the mechanical forces of machine milking / M. Odorcic, U. Blau, J. Löfstrand, R. M. Bruckmaier // Journal of Dairy Science, 2020. -- Vol. 103(1). -- P. 884-889. -- DOI: 10.3168/jds.2019-16565
Odorčić, M. Review: Milking machine settings, teat condition and milking efficiency in dairy cows / M. Odorčić, M. D. Rasmussen, C. O. Paulrud, R. M. Bruckmaier // Animal. -- 2019. -- Vol. 13(1). -- P. 94-99. DOI: 10.1017/S1751731119000417
Stauffer, C. Increased teat wall thickness in response to machine milking / C. Stauffer, E. Van der Vekens, R. M. Bruckmaier // Journal of Dairy Science, 2021. -- Vol. 104(8). -- P. 9082-9092. -- DOI: 10.3168/jds.2021-20294
Wieland, M. Prospective cohort study of the relationship between milking machine liner slip, milking performance, and cow characteristics / M. Wieland, A. Sipka // Journal of Dairy Science, 2023. -- Vol. 106(3). -- P. 2044-2053. -- DOI: 10.3168/jds.2022-22175
Golovan V. T. Device for assembly and disassembly of a two-chamber teat cup / V. T. Golovan, V. N. Aleksandrov, A. L. Tumanyan // Patent. RF No. 2238641. -- 2004. -- Bull. No. 30.
Shulyatev, V. N. Analysis of milking machines with adjustable operating parameters and prerequisites for creating an adaptive milking machine / V. N. Shulyatev, A. A. Rylov, S. N. Rylov // Materials of the XVI International Scientific and Practical Conference Science -- Technology -- Resource Saving. -- 2023. -- P. 114-117.
Bade, R. D. Interactions of vacuum, b-phase duration, and liner compression on milk flow rates in dairy cows / R. D. Bade, D. J. Reinemann, M. Zucali, P. L. Ruegg // Journal of Dairy Science. -- 2009. -- Vol. 92(3). -- P. 913-921. -- DOI: 10.3168/jds.2008-1180
Martin, L. M. Evaluation of inner teat morphology by using high-resolution ultrasound: Changes due to milking and establishment of measurement traits of the distal teat canal / L. M. Martin, C. Stöcker, H. Sauerwein, W. Büscher // Journal of Dairy Science, 2018. -- Vol. 101(9). -- P. 8417-8428. -- DOI: 10.3168/jds.2018-14500
Odorcic, M. Short communication: Teat wall diameter and teat tissue thickness in dairy cows are affected by intramammary pressure and by the mechanical forces of machine milking / M. Odorcic, U. Blau, J. Löfstrand, R. M. Bruckmaier // Journal of Dairy Science, 2020. -- Vol. 103(1). -- P. 884-889. -- DOI: 10.3168/jds.2019-16565
Odorčić, M. Review: Milking machine settings, teat condition and milking efficiency in dairy cows / M. Odorčić, M. D. Rasmussen, C. O. Paulrud, R. M. Bruckmaier // Animal. -- 2019. -- Vol. 13(1). -- P. 94-99. DOI: 10.1017/S1751731119000417
Stauffer, C. Increased teat wall thickness in response to machine milking / C. Stauffer, E. Van der Vekens, R. M. Bruckmaier // Journal of Dairy Science, 2021. -- Vol. 104(8). -- P. 9082-9092. -- DOI: 10.3168/jds.2021-20294
Wieland, M. Prospective cohort study of the relationship between milking machine liner slip, milking performance, and cow characteristics / M. Wieland, A. Sipka // Journal of Dairy Science, 2023. -- Vol. 106(3). -- P. 2044-2053. -- DOI: 10.3168/jds.2022-22175
