Perfil mineral sérico de vacas Holstein en lactación en sistemas mixtos de estabulación-pastoreo
| Autor: | Morales-Almaráz, Ernesto, Vieyra-Alberto, Rodolfo, Domínguez-Vara, Ignacio Arturo, López-González, Felipe, Arriaga-Jordán, Carlos Manuel, Sánchez-Torres, Juan Edrei |
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| Jazyk: | Spanish; Castilian |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Agronomía Mesoamericana; Agronomía Mesoamericana: Vol. 32, Issue 1 (January-April); 45-62 Agronomía Mesoamericana; Agronomía Mesoamericana: Vol. 32, Nº 1 (enero-abril); 45-62 Portal de Revistas UCR Universidad de Costa Rica instacron:UCR |
| ISSN: | 2215-3608 1021-7444 |
| Popis: | Introduction.Minerals play a very important role in nutrition; because they are necessary for the biosynthesis of essential nutrients.Objective.To evaluate the mineral status in blood serum, mineral consumption and milk production of grazing Holstein cows supplemented with different levels of concentrated feed and time spent in the meadow of Toluca valley, Mexico.Materials and methods.Two experiments were carried out with a 3x3 Latino square design each at the Universidad Autónoma del Estado de México, carried out in the spring-summer of 2011-2012. In experiment one, the level of concentrate in the diet (3, 5 and 8 kg day-1) was evaluated in grazing cows; in experiment two, three times of permanence in the prairie were evaluated (eight continuous hours; two times of four hours post-milking; and twelve hours). In both experiments, corn silage ad libitum was offered for free consumption in the pen. The concentration of Ca, P, Mg, K, Na, Cu, Fe, and Zn was measured in blood serum and foodstuffs. Simple correlation and multiple regression analysis were performed for the study variables of mineral intake, milk production, and minerals in blood serum.Results.The level of concentrate and the time spent in the prairie affected (P |
| Databáze: | OpenAIRE |
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