Tag Archives: feed

xxx L. Degola, V. Sterna, I. Jansons and S.Zute
The nutrition value of soybeans grown in Latvia for pig feeding
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The nutrition value of soybeans grown in Latvia for pig feeding

L. Degola¹*, V. Sterna², I. Jansons² and S.Zute²

¹Latvia University of Life Sciences and Technologies, Institute of Animal Sciences, Liela 2, LV3001 Jelgava, Latvia
²Institute of Agricultural Resources and Economics, “Dizzemes”, LV–3258 Dizstende, Libagi parish, Talsi County, Latvia
*Correspondence: lilija.degola@llu.lv

Abstract:

Soybean products are excellent sources of protein for pigs because their amino acid profiles complement those of cereal grains. Soy protein is rich in the limiting amino acids lysine, threonine, and tryptophan that are present in relatively low concentrations in the most commonly fed cereal grains. Amino acids in soy protein are more digestible than amino acids in most other plants proteins, which results in less nitrogen being excreted in the manure from pigs fed diets containing soybean meal than if other protein sources are used. The phosphorus in soy products is bound to phytic acid, which has a low digestibility to pigs, but the digestibility of phosphorus in soy products may be increased to more than 60% if diets are supplemented with microbial phytase. There are no much results about nutrition value of soybean growing in Latvia. Therefore the aim of study was determined chemical composition of soybeans growing in Latvia and evaluates their potential in pig feeding.
Research object were soybeans growing in Latvia. In the studied samples content of protein, fat, ash, fibre, composition of amino acids were determined and metabolizable energy were calculated. Evaluated that protein content varied from 32.7 till 40.7%, fat content was from 18.4–21.4% and significantly differed (p < 0.05) among growing places, but the sum of essential amino acids in the soy beans determined 115–125 g kg-1, and were not differed significantly by varieties. The content of lysine in protein were determined 5.1–5.5 g 100 g-1. Concluded that soy bean growing in Latvia provides equilibrium high metabolizable energy for pigs – from 13.2 to 17.6 MJ kg-1 and could be used in feed.

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879–889 P. Vaculík and A. Smejtková
Assessment of selected parameters of automatic and conventional equipment used in cattle feeding
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Assessment of selected parameters of automatic and conventional equipment used in cattle feeding

P. Vaculík* and A. Smejtková

Czech University of Life Sciences Prague, Faculty of Engineering, Department of Technological Equipment of Buildings, Kamýcká 129, CZ165 21 Prague 6 - Suchdol, Czech Republic
*Correspondence: vaculik@tf.czu.cz

Abstract:

A cattle farming is a very important sector of agriculture. In the Czech Republic, both breeds with ‘combined useful’ as well as ‘meat cattle’ are breeding, but especially ‘dairy cattle’ breeds. Providing feed at the right time, in required quantity and quality is the basis of successful breeding, especially in breeding dairy cows. Automatic systems are present in almost all sectors of human activity, and livestock production is no exception. Fully automatic feeding systems for pigs or poultry are already in use. The process of milking cattle using automated milking systems is also sufficiently mastered. An interesting trend is the installation of automated feeding systems for cattle feeding. They are stationary lines that perform the following operations: they dose the individual components of the feed mixture, mix the feed mixture and distribute it to the relevant feed places. All these activities are usually done without the presence of a person. The automated feeding system Lely Vector and the conventional feeding system using feeding wagon Cernin were compared. The number of automated feed wagon runs has been monitored and then the feed consumption was compared while using automatic and conventional equipment. The aim of this paper is to evaluate the benefits of an automatic feed system with regard to the conventional feed system through a mobile feed car.

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556-563 K.P. Oliveira, C.F.S. Ferreira, I.F.F. Tinoco, R.R. Andrade, M. Barbari, V.M.F. Cruz, F.J.F. Baptista, M.F.A. Vieira, L. Conti and G. Rossi
Productive performance of broilers at the final stage of breeding submitted to different levels of metabolizable energy in different thermal environments
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Productive performance of broilers at the final stage of breeding submitted to different levels of metabolizable energy in different thermal environments

K.P. Oliveira¹, C.F.S. Ferreira¹, I.F.F. Tinoco¹, R.R. Andrade¹, M. Barbari²*, V.M.F. Cruz³, F.J.F. Baptista³, M.F.A. Vieira⁴, L. Conti² and G. Rossi²

¹University of Viçosa, Department of Agricultural Engineering of Federal, Av. Peter Henry Rolfs, s/n Campus University of Viçosa, CEP: BR36570-900, Viçosa, Brazil
²University of Firenze, Department of Agricultural, Food and Forestry Systems, Via San Bonaventura, 13, IT50145 Firenze, Italy
³University of Évora, Department of Rural Engineering, Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Núcleo da Mitra, Évora, Portugal
⁴Federal Rural University of Amazonia – UFRAPA-256, s/n – Nova Conquista, Paragominas – PA, 68627-451
*Correspondence: matteo.barbari@unifi.it; kelle.oliveira@ufv.br

Abstract:

The Brazilian poultry industry is an activity in constant development due to the high indices of productive efficiency. The accelerated evolution of poultry production has allowed to obtain early and very efficient broilers able to convert different foods into animal protein. However, due to this intensive breeding system, a series of metabolic and management problems appeared, with emphasis on thermal stress. The objective of this work was to evaluate the physiological responses of broiler chickens in the final stage of breeding (21 to 42 days of life), submitted to two thermal conditions, one representative of the thermoneutrality situation (T1) and one giving a situation of cyclic stress by heat (T2). For each experimental thermal condition, the birds were submitted to different levels of metabolizable energy of 3,050, 3,125, 3,200, 3,275 kcal kg-1. At 28, 35 and 42 days, the birds and the feed leftovers were weighed to measure the performance variables: CR (feed intake), GP (weight gain) and CA (feed conversion), viability of the rearing (Vb), productive efficiency index (PEI).
As conclusions, the GP was 13.6% higher for the birds maintained at the thermoneutrality situation T1. The PEI was 32.5% higher for the birds maintained in T1 condition, when compared to those kept in T2. However, both in thermoneutral and in heat stress conditions, the increase in the level of metabolizable energy in the diet did not influence the performance and the productive efficiency index of broiler chickens aged between 21 and 42 days of age.

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