EFFECT OF PROTEIN LEVEL ON GROWTH INTENSITY AND DIGESTIBILITY OF NUTRIENTS IN FATTENED CROSSBRED PIGS
Keywords:
fattened pigs, compound feed, digestibilityAbstract
At the Agricultural Institute – Shumen was carried out a scientific economic experiment with fattened pigs from the cross ♀Danube White (DW) x (English Landrace (EL) х Pietren (P)) х ♂Danish
Landrace (DL). The animals were divided into two groups of 18 or a total of 36 pigs. Experience be-
gan at 29.294–29.278 kg live weight and ended at 100.706–102.167 kg. The experiment was conducted
in two sub-periods – first from 30 to 60 kg live weight and second from 60 kg to end of experiment.
In group II, the crude protein level was increased by 2 percentage points (from 17.0–15.5% to
19.0–17.5%), respectively, and higher was the level of amino acids in the compound feeds. At the end
of the fattening of the animals, the lean meat content was determined in vivo.
A physiological trial for digestibility of nutrients was performed with two groups of 3 male castrated pigs with 67.000 kg live weight. Pigs were housed in dedicated cells. The digestibility was calculated for each animal individually, separately for each nutrient as the difference between the feed
intake and the faeces.
The results of the experiments showed that animals fed with compound feed containing 19.0–17.5%
protein achieved a higher average daily growth (by 10.60%, p ≤ 0.001) and a lower feed conversion
ratio (by 10.84%, p ≤ 0.001) compared to fed fodder with a protein content of 17.0–15.5%.
A tendency was observed for the dorsal fat thickness for lower values (by 9.94% – x1 and 5.61%
– x2) in animals receiving compound feed with a higher protein content and a higher coefficient of digestibility of fibers, fats, minerals and calcium by 25.58%, 23.28%, 16.68% and 12.40%, respectively,
in the same group of pigs.
References
Илчев, А. (2012). Проучване влиянието на храненето, възрастта и генотипа върху ретенцията и екскрецията на азот и минерални вещества при растящи и угоявани свине. Автореферат за присъждане на научната степен „доктор на науките“, ТУ – Стара Загора.
Йорданова, Г. (2014). Ефект от изпитването на биологичноактивни компоненти върху продуктивността на подрастващи и угоявани прасета. Шумен, Дисертация, с. 136.
Кънев, Д. (2008). Проучване влиянието на някои белтъчни компоненти върху продуктивността на растящи прасета. Дисертация, София, 155 с.
Недева, Р. (2002). Влияние на различни равнища на калций и фосфор върху продуктивността на подрастващи и прасета за угояване. София, Дисертация, с. 150.
Шулаев, Г. М., В. Ф. Энговатов, А. Н. Бетин, Р. К. Милушев. (2014). Концентрат из растительного белка – альтернатива рыбной муке. Свиноводство, 4, 73-74
Ball, M. E. E., Magowan, E., McCracken, K. J., Beattie, V. E., Bradford, R., Gordon, F. J., ... & Henry, W. (2013). The effect of level of crude protein and available lysine on finishing pig performance, nitrogen balance and nutrient digestibility. Asian-Australasian journal of animal sciences, 26(4), 564-572
Gary, L. (2012). Cromwell, PhD, Professor, Department of Animal and Food Sciences, University of Kentucky.
Ganchev, G., & Ilchev, A. (2013). Comparative investigations on feeding efficiency in growing and fattening DanBred and Topigs hybrid pigs. Agricultural Science & Technology, v. 5, 4, 400-404
Kodes, A., Hucko, B., Mudrik, Z., Eberova, J., & Neuzil, T. (2003). Digestibility of nutrients in hybrid pigs. Scientia Agriculturae Bohemica (Czech Republic). 34, 3, 90-93
Rothschild, M. F., & Ruvinsky, A. (Eds.). (2011). The genetics of the pig. CABI. p. 342-348
Soto, J., Tokach, M. D., Dritz, S. S., Woodworth, J. C., DeRouchey, J. M., & Goodband, R. D. (2016). Determination of the Optimum Levels of Dietary Crude Protein for Growth Performance and Carcass Characteristics of Finishing Pigs from 240 to 280 lb. Kansas state university,Swine industry day, 1-6
Tous, N., Lizardo, R., Vila, B., Gispert, M., Font-iFurnols, M., & Esteve-Garcia, E. (2014). Effect of reducing dietary protein and lysine on growth performance, carcass characteristics, intramuscular fat, and fatty acid profile of finishing barrows. Journal of animal science, 92(1), 129-140.
Van Lunen, T. A., Cole, D. J. A. (2001). Energy-amino acid interactions in modern pig genotypes. In: Wiseman, J., Garnsworthy PC, editors. Recent Developments in Pig Nutrition 3. Nottingham University Press; 2001. pp. 439-466
Nutritional Requirements of Pigs. (2012). Washington.
Protein nutrition requirements of farmed livestock and dietary supply. (2004). Miller, E.L. FAO, Rome (Italy). Animal Production and Health Div. eng FAO Expert.
Downloads
Published
Issue
Section
Categories
License
Copyright (c) 2017 Bulgarian Journal of Animal Husbandry
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
