Obliczeniowa metoda ustalania wymagań termicznych świń rosnących dla potrzeb wentylacji

• Autorzy: Wrotkowski K.

Warianty tytułu

EN

Computational method for determining the thermal requirements of growing pigs for ventilation purposes

• Języki publikacji: PL

Abstrakty

EN

The study presents a method of determining the thermal requirements of swine, that is, a range constrained by lower and upper critical temperatures,. The method is based on energy relationships between the nutrition system, the process of energy accumulation in an animal’s organism, the amount of heat produced, and the possibilities of returning this heat to the environment depending on conditions in the immediate surroundings of swine. The method consists of a uniform calculation system formed by commonly known and practically applied formal descriptions of the above energy interactions. The model of the animal’s growth is implemented with and based on qualitative changes in the chemical composition of daily gains as a function of the animal’s body weight. This makes it possible to link these energy interactions with the animal’s genotype, as well as its production and breeding parameters, such as the daily gain and its chemical composition, feed consumption, the efficiency of the utilization of energy provided with feeds, efficiency measured with the daily gain, etc. Moreover, the method makes it possible to determine the ambient temperature needed to maintain a constant thermal interaction with the surroundings regardless of changes in technological factors such as feeding intensity or animal husbandry conditions. This may be useful in comparative research, in which disturbing influences of the environment on the rate and composition of the animal’s daily gains need to be eliminated.

Słowa kluczowe

PL

trzoda chlewna; zwierzeta rosnace; wymagania termiczne; obliczenia; metody obliczen; wentylacja

• Wydawca: -
• Czasopismo: Medycyna Weterynaryjna
• Rocznik: 2012
• Tom: 68
• Numer: 07
• Opis fizyczny: s.430-435,rys.,bibliogr.

Twórcy

autor

Wrotkowski K.

• Katedra Maszyn i Urządzeń Rolniczych, Wydział Inżynierii Produkcji, Uniwersytet Przyrodniczy w Lublinie, ul.Poniatowskiego 1, 20-060 Lublin

Bibliografia

• 1.Alexandrowicz S., Mazaraki J.: Produkcja trzody chlewnej. PWRiL, Warszawa 1981.
• 2.Bridges T. C., Turner L. W., Gates R. S., Smith E. M.: Relativity of growth in laboratory and farm animals: I. Representation of physiological age and the growth rate time constant. Transac. ASAE 2000, 43, 1803-1810.
• 3.Bridges T. C., Turner L. W., Gates R. S., Smith E. M.: Relativity of growth in laboratory and farm animals: II. Birth weight as a predictor of animal maturity. Transac. ASAE 2000, 43, 1811-1819.
• 4.Bridges T. C., Turner L. W., Smith E. M., Stahly J. L., Loewer O. J.: A mathematical procedure for estimating animal growth and body composition. Transac. ASAE 1986, 29, 1342-1347.
• 5.Bridges T. C., Turner L. W., Stahly T. S., Usry J. L., Loewer O. J.: Modeling the physiological growth of swine. Part I: Model logic and growth concepts. Transac. ASAE 1992, 35, 1019-1028.
• 6.Bridges T. C., Turner L. W., Usry J. L., Nienaber J. A.: Modeling the physiological growth of swine. Part II: Validation of model logic and growth concepts. Transac. ASAE 1992, 35, 1029-1033.
• 7.Bruce J. M., Clark J. J.: Models of heat production and critical temperature for growing pigs. Anim. Prod. 1979, 28, 353-369.
• 8.Cherepanov G. G.: A morphophysiological conception and model of animal growth. J. Anim. Feed Sci. 2001, 10, 385-397.
• 9.Fandrejewski H.: Energia w nowych normach żywienia świń. Przegl. Hod. 1994, 7, 1-6.
• 10.Fandrejewski H., Raj St.: Próba określenia ilości białka odkładanego w przyroście dziennym świń różnych ras i linii. Pr. Mat. Zoot. 2002, 13, 43-48.
• 11.Keller J. S.: Maintenance energy requirements in adult and growing organisms - an unresolved problem. J. Anim. Feed Sci. 2002, 11, 351-366.
• 12.Kielanowski J.: Energetyczne wartościowanie paszy. PWRiL, Warszawa 1973.
• 13.Kleiber M.: Ogień życia. Zarys bioenergetyki zwierząt. PWRiL, Warszawa 1968.
• 14.Millward D. J., Garlick P. J., Reeds P. J.: The energy cost of growth. Proc. Nutr. Soc. 1976, 35, 339-349.
• 15.Skiba G., Fandrejewski H., Raj S., Weremko D.: Energy metabolism of growing pigs during protein and energy deficiency and subsequent realimentation. J. Anim. Feed Sci. 2003, 12, 739-747.
• 16.Skiba G., Fandrejewski H., Raj S., Weremko D.: Performance, chemical body composition, and energy balance of 70-kg pigs as affected by dietary restriction in young age. J. Anim.Feed Sci. 2001, 10, suppl. 2, 191-196.
• 17.Skiba G., Fandrejewski H., Raj S., Weremko D.: The influence of previous protein or energy restriction of young pigs on their daily gain composition. J. Anim. Feed Sci. 2002, 11, 299-308.
• 18.Skiba G., Fandrejewski H., Raj S., Weremko D.: The performance and body composition of growing pigs during protein or energy deficiency and subsequent realimentation. J. Anim. Feed Sci. 2001, 10, 633-647.
• 19.Ryś R. (red.): Normy żywienia zwierząt gospodarskich. Instytut Zootechniki wydanie IX, PWRiL, Warszawa 1982.
• 20.Wrotkowski K.: Bilans cieplny organizmu zwierzêcia jako podstawowe kryterium wyboru systemu utrzymania trzody chlewnej. Praca hab. Rozprawy Naukowe Akademii Rolniczej w Lublinie, zesz. 320, WAR, Lublin 2006.
• 21.Wrotkowski K.: Metoda ustalania wymaganej temperatury w chlewni. Cz. I.: Metoda ustalania adekwatnej temperatury. Inż. Roln. 2006, 81, 389-396.
• 22.Wrotkowski K.: Metoda ustalania wymaganej temperatury w chlewni. Cz. II.: Metoda ustalania temperatury zdeterminowanej technologią chowu. Inż. Roln. 2006, 81, 397-406.
• 23.Wrotkowski K.: Metoda ustalania wymaganej temperatury w chlewni z uwzględnieniem aktywności zwierząt. Inż. Roln. 2011, 126, 293-300.