Feeding restriction impairs milk yield and physicochemical properties rendering it less suitable for sale
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/83295 |
Resumo: | Feed shortages are relatively frequent in subtropical pasture-based dairy production systems. The effect of feed restriction on milk yield and physical-chemical traits was evaluated in this study. The experiment was carried out in Brazil’s south region. Treatments consisted of control and restricted diet. Six multiparous and six primiparous cows, with 499 ± 47.20 kg body weight (BW), at mid-lactation (188 ± 124 days in milk), producing 19.35 ± 4.10 kg of milk were assigned to two groups, balanced for parity, each group receiving a different sequence of the dietary treatments for 56 days, in a crossover design. Diet nominated as control included 8 kg DM 100 kg BW–1 of Bermuda grass var. Tifton pasture (Cynodon dactylon (L.) Pers.), 5.00 kg of concentrate and 2.50 kg of Tifton hay per day. The restriction diet consisted of 50 % of the quantity offered in the control diet. Milk production and physicochemical composition were evaluated. Feed restriction reduced milk production by 40 %, body condition score by 5 %, milk magnesium by 14.3 %, lactose by 1.7 %, titratable acidity by 10 % and stability to the ethanol test by 9 % and it tended to increase (7 %) milk potassium content. No changes were found for the remaining characteristics. Since feed restriction is quite frequent in Brazil’s extensive dairy production systems, our concern is that besides decreased milk production, changes can occur in the physiochemical attributes of the milk, mainly a reduction in the stability to the ethanol test, which may increase the volume of milk rejected by the industry. |
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Fruscalso, VilmarStumpf, Marcelo TempelPimentel, Concepta Margaret McManusFischer, Vivian2013-12-06T01:49:02Z20130103-9016http://hdl.handle.net/10183/83295000904602Feed shortages are relatively frequent in subtropical pasture-based dairy production systems. The effect of feed restriction on milk yield and physical-chemical traits was evaluated in this study. The experiment was carried out in Brazil’s south region. Treatments consisted of control and restricted diet. Six multiparous and six primiparous cows, with 499 ± 47.20 kg body weight (BW), at mid-lactation (188 ± 124 days in milk), producing 19.35 ± 4.10 kg of milk were assigned to two groups, balanced for parity, each group receiving a different sequence of the dietary treatments for 56 days, in a crossover design. Diet nominated as control included 8 kg DM 100 kg BW–1 of Bermuda grass var. Tifton pasture (Cynodon dactylon (L.) Pers.), 5.00 kg of concentrate and 2.50 kg of Tifton hay per day. The restriction diet consisted of 50 % of the quantity offered in the control diet. Milk production and physicochemical composition were evaluated. Feed restriction reduced milk production by 40 %, body condition score by 5 %, milk magnesium by 14.3 %, lactose by 1.7 %, titratable acidity by 10 % and stability to the ethanol test by 9 % and it tended to increase (7 %) milk potassium content. No changes were found for the remaining characteristics. Since feed restriction is quite frequent in Brazil’s extensive dairy production systems, our concern is that besides decreased milk production, changes can occur in the physiochemical attributes of the milk, mainly a reduction in the stability to the ethanol test, which may increase the volume of milk rejected by the industry.application/pdfengScientia Agricola. Piracicaba. Vol. 70, n. 4 (jul./ago. 2013), p. 219-303Produção leiteiraNutricao animalPastagemRio Grande do SulAlcohol testGrazing systemsMilk stabilityUnderfeedingFeeding restriction impairs milk yield and physicochemical properties rendering it less suitable for saleinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000904602.pdf000904602.pdfTexto completo (inglês)application/pdf157642http://www.lume.ufrgs.br/bitstream/10183/83295/1/000904602.pdfcd78109e4eb69ec4e71ded5b20198c14MD51TEXT000904602.pdf.txt000904602.pdf.txtExtracted Texttext/plain26017http://www.lume.ufrgs.br/bitstream/10183/83295/2/000904602.pdf.txt4ac009a073dba002c88a0565682ea131MD52THUMBNAIL000904602.pdf.jpg000904602.pdf.jpgGenerated Thumbnailimage/jpeg1800http://www.lume.ufrgs.br/bitstream/10183/83295/3/000904602.pdf.jpg2dfa47035da71f8f14a541d91ca38954MD5310183/832952021-08-18 04:35:37.598742oai:www.lume.ufrgs.br:10183/83295Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-08-18T07:35:37Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Feeding restriction impairs milk yield and physicochemical properties rendering it less suitable for sale |
title |
Feeding restriction impairs milk yield and physicochemical properties rendering it less suitable for sale |
spellingShingle |
Feeding restriction impairs milk yield and physicochemical properties rendering it less suitable for sale Fruscalso, Vilmar Produção leiteira Nutricao animal Pastagem Rio Grande do Sul Alcohol test Grazing systems Milk stability Underfeeding |
title_short |
Feeding restriction impairs milk yield and physicochemical properties rendering it less suitable for sale |
title_full |
Feeding restriction impairs milk yield and physicochemical properties rendering it less suitable for sale |
title_fullStr |
Feeding restriction impairs milk yield and physicochemical properties rendering it less suitable for sale |
title_full_unstemmed |
Feeding restriction impairs milk yield and physicochemical properties rendering it less suitable for sale |
title_sort |
Feeding restriction impairs milk yield and physicochemical properties rendering it less suitable for sale |
author |
Fruscalso, Vilmar |
author_facet |
Fruscalso, Vilmar Stumpf, Marcelo Tempel Pimentel, Concepta Margaret McManus Fischer, Vivian |
author_role |
author |
author2 |
Stumpf, Marcelo Tempel Pimentel, Concepta Margaret McManus Fischer, Vivian |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Fruscalso, Vilmar Stumpf, Marcelo Tempel Pimentel, Concepta Margaret McManus Fischer, Vivian |
dc.subject.por.fl_str_mv |
Produção leiteira Nutricao animal Pastagem Rio Grande do Sul |
topic |
Produção leiteira Nutricao animal Pastagem Rio Grande do Sul Alcohol test Grazing systems Milk stability Underfeeding |
dc.subject.eng.fl_str_mv |
Alcohol test Grazing systems Milk stability Underfeeding |
description |
Feed shortages are relatively frequent in subtropical pasture-based dairy production systems. The effect of feed restriction on milk yield and physical-chemical traits was evaluated in this study. The experiment was carried out in Brazil’s south region. Treatments consisted of control and restricted diet. Six multiparous and six primiparous cows, with 499 ± 47.20 kg body weight (BW), at mid-lactation (188 ± 124 days in milk), producing 19.35 ± 4.10 kg of milk were assigned to two groups, balanced for parity, each group receiving a different sequence of the dietary treatments for 56 days, in a crossover design. Diet nominated as control included 8 kg DM 100 kg BW–1 of Bermuda grass var. Tifton pasture (Cynodon dactylon (L.) Pers.), 5.00 kg of concentrate and 2.50 kg of Tifton hay per day. The restriction diet consisted of 50 % of the quantity offered in the control diet. Milk production and physicochemical composition were evaluated. Feed restriction reduced milk production by 40 %, body condition score by 5 %, milk magnesium by 14.3 %, lactose by 1.7 %, titratable acidity by 10 % and stability to the ethanol test by 9 % and it tended to increase (7 %) milk potassium content. No changes were found for the remaining characteristics. Since feed restriction is quite frequent in Brazil’s extensive dairy production systems, our concern is that besides decreased milk production, changes can occur in the physiochemical attributes of the milk, mainly a reduction in the stability to the ethanol test, which may increase the volume of milk rejected by the industry. |
publishDate |
2013 |
dc.date.accessioned.fl_str_mv |
2013-12-06T01:49:02Z |
dc.date.issued.fl_str_mv |
2013 |
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000904602 |
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http://hdl.handle.net/10183/83295 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Scientia Agricola. Piracicaba. Vol. 70, n. 4 (jul./ago. 2013), p. 219-303 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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