Lã: Características e fatores de produção

Amarilho-Silveira, F.; Brondani, W. C.; Lemes, Jaqueline Schneider

doi:10.21071/az.v64i247.502

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…This lack of consistency affects the profitability of the activity negatively and limits investment planning, for example, in improvements in nutrition and the use of technologies. Herds of the breeds evaluated in the present study produced, on average, three kilograms of fleece wool/sheep/year (Amarilho-Silveira et al, 2015). The amount paid annually for the lamb carcass produced was thus significantly higher compared with the profitability from wool production, even in the Merino breed.…”

Section: Discussionmentioning

confidence: 68%

Phenotypic characteristics of male lambs of woolen sheep breeds and their relationship with liquidity and price offered at auctions in Uruguaiana - Rio Grande do Sul

Kleinübing¹,

Menezes²,

Bastos³

et al. 2022

Revista Brasileira De Zootecnia

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This study aimed at analyzing and comparing the phenotypic characteristics of height, body length, and fleece wool fineness with the liquidity and final price sold in auctions in the city of Uruguaiana, RS, Brazil, for three consecutive years (2015 to 2017). A total of 412 one-year-old (two teeth) male sheep, of the Australian Merino (n = 50), Polwarth (n = 130), and Corriedale (n = 232) breeds were evaluated. Height and length of the animals were measured on the day of the auction with a measuring tape, and animals were grouped into small or tall and short or long categories, as defined in this study. Wool fineness was measured using an Optical-based Fibre Diameter Analyser (FDA 2000) device and classified according to official wool classification standards (the Bradford System). There was no statistical difference in the average selling price of different breeds. There was a correlation between the breed and liquidity, in which Corriedale lambs were sold more than the Polwarth lambs, as expected; however, there was no such correlation for Merino lambs. The tall Merino lambs were sold at a higher selling price

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Section: Discussionmentioning

confidence: 68%

Phenotypic characteristics of male lambs of woolen sheep breeds and their relationship with liquidity and price offered at auctions in Uruguaiana - Rio Grande do Sul

Kleinübing¹,

Menezes²,

Bastos³

et al. 2022

Revista Brasileira De Zootecnia

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“…There was no loss in weight or body condition in ewes supplemented during the final third of pregnancy, since during the critical period of pregnancy their nutritional level was higher (Cranston et al, 2017), showing that it is not necessary to remove energy from the organism to maintain pregnancy and secretion of the mammary gland (Joy et al, 2014), or remove nutrients intended for the growth of wool fibre for other functions of the organism (Silveira et al, 2015).…”

Section: Resultsmentioning

confidence: 97%

Supplementation during pregnancy on the production and metabolic profile of Polwarth sheep

Lemes,

Brondani,

Costa

et al. 2024

Sem. Ci. Agr.

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The aim of this study was to evaluate the effect of supplementation during different stages of pregnancy on the development and productive performance of Polwarth sheep. Fifty-three adult ewes under synchronised pregnancy were submitted to a supplement of 1.5% body weight with commercial feed during the different stages of pregnancy on natural pasture: NS - no supplementation, SIG - supplemented during the initial third of pregnancy, SMG - supplemented during the middle third of pregnancy, SFG - supplemented during the final third of pregnancy, and STG - supplemented throughout pregnancy. The ewes were weighed at the time of laparoscopic insemination, at every third stage of the pregnancy, and two days before the expected lambing date, at which time the body condition score and metabolic markers were evaluated. The pre-lambing weight of the STG ewes was greater than that of the SFG and SMG ewes, which were, in turn, greater than the SIG and NS ewes. Body condition was superior in the STG and SFG ewes. Lamb survival was greater in the STG and SFG ewes, and lower in the SMG, SIG and NS ewes. Beta-hydroxybutyrate was lower in the SFG and STG ewes. Supplementation during the final third and throughout pregnancy increases the rates of survival and production in the lambs, with supplementation only during the final third of gestation being less costly for the production system.

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“…La poca cantidad de kemp de las criollas de Ite mostró superioridad de su lana a nivel industrial (Parés et al, 2011a), en comparación a las MHD y otras razas criollas con valores más elevados, como las ovejas estadounidenses Navajo-Churro (2 a 5%), Churras españolas ( 2002), respectivamente. Se sabe que el kemp es un pelo corto y rígido, indeseado en la industria textil, por ser medulado y de diámetro muy grueso (> 80 µ), lo que disminuye la calidad y precio de la lana cuando es vendida (Amarilho-Silveira et al, 2015), ya que esa característica restringe la absorción de tintas para su coloración artificial, además de provocar fácil rompimiento de las fibras durante el proceso (Parés et al 2011a).…”

Section: Variablesunclassified

Caracterización macroscópica y microscópica de lana ovina en el litoral sur de Perú

et al. 2018

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En Perú, la producción de lana se posicionó en mejor lugar para competir con las fibras sintéticas, debido al precio oscilante del petróleo a nivel mundial. Este estudio objetivó caracterizar lana ovina, según cualidades macroscópicas y microscópicas de interés etnológico y económico. En el municipio de Ite, litoral sur de Perú, fueron muestreados mechones de lana en 20 ovejas criollas de los Humedales, 20 criollas de las chácaras y seis mestizas Hampshire Down. También fue medido el peso vivo de los ovinos. Los resultados de las características físicas de la lana y pesos vivos fueron transcritos a planillas electrónicas, para analizar mediante estadística descriptiva usando el programa computacional R y crear un histograma. Las ovejas mestizas y criollas de las chacras eran más pesadas que las criollas de los Humedales. En los tres grupos predominaron las fibras cortas, con ventaja de los ovinos criollos por menor presencia de kemp. Los criollos de los Humedales poseían mayor largura de mechón y rendimiento al post desengrase. Los diámetros de fibra de las ovejas criollas de Ite indicaron una lana entrefina y confortable. Estos rebaños poseen fibras útiles en la confección textil industrial, pero el grupo criollo de los Humedales puede ser seleccionado por sus mechones más largos para uso artesanal. En las chacras existen cruzamientos absorbentes de hembras criollas con mestizos Hampshire Down. Es urgente crear núcleos de ovinos locales buscando su conservación y fomento entre los criadores, quienes deben organizarse y pedir apoyo gubernamental para la confección textil, logrando una ovinocultura sustentable en Ite.

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Lã: Características e fatores de produção

Cited by 7 publications

References 6 publications

Phenotypic characteristics of male lambs of woolen sheep breeds and their relationship with liquidity and price offered at auctions in Uruguaiana - Rio Grande do Sul

Phenotypic characteristics of male lambs of woolen sheep breeds and their relationship with liquidity and price offered at auctions in Uruguaiana - Rio Grande do Sul

Supplementation during pregnancy on the production and metabolic profile of Polwarth sheep

Caracterización macroscópica y microscópica de lana ovina en el litoral sur de Perú

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