| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
|
Data corrente: |
08/01/1998 |
|
Data da última atualização: |
11/02/2025 |
|
Autoria: |
BRADFORD, G. E. |
|
Título: |
Genetic and economic aspects of selecting for lamb carcass quality. |
|
Ano de publicação: |
1967 |
|
Fonte/Imprenta: |
Journal of Animal Science, v. 26, n. 1, p. 10-15, 1967. |
|
Idioma: |
Inglês |
|
Notas: |
Invited paper presented at the Sheep Special Lives toe Session,57th Annual Meeting, American Society of Anim; Science, East Lansing, Michigan. |
|
Conteúdo: |
Abstract: The problem of how to make genetic improvement in lamb carcass and meat quality is an important one to the industry, but one for which many relevant questions are unanswered or only partly answered. The greatest scarcity of information of the desired reliability for decision making is probably in the area of relative economic values of carcass and other production characteristics. Also extremely important but at present largely lacking is information on genetic correlations among these, especially with respect to the kinds of problems likely to be encountered as a result of intense directional selection for specific traits. Accurate estimates of heritability of lamb carcass traits are also lacking, although this may be a less serious problem than the first two mentioned. We can probably assume, from the limited information on sheep and from knowledge of other species, that lamb carcass traits have medium to high heritability. |
|
Thesagro: |
Carcaça; Melhoramento; Ovino; Seleção. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01543nam a2200169 a 4500
001 1517960
005 2025-02-11
008 1967 bl uuuu u00u1 u #d
100 1 $aBRADFORD, G. E.
245 $aGenetic and economic aspects of selecting for lamb carcass quality.
260 $aJournal of Animal Science, v. 26, n. 1, p. 10-15, 1967.$c1967
500 $aInvited paper presented at the Sheep Special Lives toe Session,57th Annual Meeting, American Society of Anim; Science, East Lansing, Michigan.
520 $aAbstract: The problem of how to make genetic improvement in lamb carcass and meat quality is an important one to the industry, but one for which many relevant questions are unanswered or only partly answered. The greatest scarcity of information of the desired reliability for decision making is probably in the area of relative economic values of carcass and other production characteristics. Also extremely important but at present largely lacking is information on genetic correlations among these, especially with respect to the kinds of problems likely to be encountered as a result of intense directional selection for specific traits. Accurate estimates of heritability of lamb carcass traits are also lacking, although this may be a less serious problem than the first two mentioned. We can probably assume, from the limited information on sheep and from knowledge of other species, that lamb carcass traits have medium to high heritability.
650 $aCarcaça
650 $aMelhoramento
650 $aOvino
650 $aSeleção
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Semiárido. |
|
Data corrente: |
19/04/2016 |
|
Data da última atualização: |
20/02/2017 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
B - 1 |
|
Autoria: |
PEREIRA FILHO, A.; TEIXEIRA FILHO, J.; GIONGO, V.; SIMOES, W. L.; LAL, R. |
|
Afiliação: |
ANTONIO PEREIRA FILHO, UNIVASF; JOSÉ TEIXEIRA FILHO, UNICAMP; VANDERLISE GIONGO, CPATSA; WELSON LIMA SIMOES, CPATSA; RATTAN LAL, Ohio State University, Columbus, OH. |
|
Título: |
Nutrients dynamics in soil solution at the outset of notill implementation with the use of plant cocktails in Brazilian Semi-Arid. |
|
Ano de publicação: |
2016 |
|
Fonte/Imprenta: |
African Journal of Agricultural Research, v. 11, n. 4, p. 234-246, jan. 2016. |
|
ISSN: |
1991-637X |
|
DOI: |
10.5897/AJAR2015.10047 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Tillage systems strongly impact nutrient transformations and plant availability. Therefore, the objective of this study was to assess the impacts of conversion of conventional tillage (CT) to no-till (NT) with a mixture of cover crops and green manure as nutrient uptake in a fertilized melon (Cucumis melon) in a semi-arid region of Brazil. Two fields experimental involved randomized blocks design, in a split-plot scheme, with four replication treatments included three types of cover crops and two tillage systems (conventional and no-till). Subsamples of plant cocktails were used to assess the biomass production. Soil samples were analyzed during the melon growth for determination of soil moisture by the frequency domain reflectometry (FDR) probe. Soil solution samples were extracted with ceramic cups from each treatment, and analyzed for determination of TP, Na+, Ca2+, Mg2+, S and NO3-N. Mobility of these elements was assessed in relation to management and different cover crops. The data showed slight or no strong effect of plant cocktails composition on nutrients dynamics in soil under melon. However, without incorporation of biomass and slower decomposition of residue mulch retained on the surface, risks of leaching losses were lower under NT than CT system. A higher concentration of cations in CT (for example, Ca+2 42.07 mg L-1) may be attributed to high soil moisture content and faster rate of mineralization of the biomass incorporated. Concentration of P was higher in top soil layers depth in NT system (6.65 mg L-1 at 15 cm) because of the deposition of plant cocktail biomass in soil surface with low SOM contents placement of fertilizer, and possible formation of calcium phosphate with low solubility. Relatively, high concentration of NO3-N (~ 60.16 mg L-1) in CT was attributed to increase in decomposition of soil organic matter (SOM) and crop residues incorporated into the soil. MenosTillage systems strongly impact nutrient transformations and plant availability. Therefore, the objective of this study was to assess the impacts of conversion of conventional tillage (CT) to no-till (NT) with a mixture of cover crops and green manure as nutrient uptake in a fertilized melon (Cucumis melon) in a semi-arid region of Brazil. Two fields experimental involved randomized blocks design, in a split-plot scheme, with four replication treatments included three types of cover crops and two tillage systems (conventional and no-till). Subsamples of plant cocktails were used to assess the biomass production. Soil samples were analyzed during the melon growth for determination of soil moisture by the frequency domain reflectometry (FDR) probe. Soil solution samples were extracted with ceramic cups from each treatment, and analyzed for determination of TP, Na+, Ca2+, Mg2+, S and NO3-N. Mobility of these elements was assessed in relation to management and different cover crops. The data showed slight or no strong effect of plant cocktails composition on nutrients dynamics in soil under melon. However, without incorporation of biomass and slower decomposition of residue mulch retained on the surface, risks of leaching losses were lower under NT than CT system. A higher concentration of cations in CT (for example, Ca+2 42.07 mg L-1) may be attributed to high soil moisture content and faster rate of mineralization of the biomass incorporated. Concentration of P was higher in t... Mostrar Tudo |
|
Palavras-Chave: |
Adubação orgânica; Macronutrientes. |
|
Thesagro: |
Caatinga; Cucumis Melo; Fertilidade do solo; Manejo do Solo; Melão; Planta; Plantio Direto; Solo. |
|
Thesaurus NAL: |
Soil. |
|
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
|
URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/1043609/1/Vanderlise2016.pdf
|
|
Marc: |
LEADER 02870naa a2200325 a 4500
001 2043609
005 2017-02-20
008 2016 bl uuuu u00u1 u #d
022 $a1991-637X
024 7 $a10.5897/AJAR2015.10047$2DOI
100 1 $aPEREIRA FILHO, A.
245 $aNutrients dynamics in soil solution at the outset of notill implementation with the use of plant cocktails in Brazilian Semi-Arid.$h[electronic resource]
260 $c2016
520 $aTillage systems strongly impact nutrient transformations and plant availability. Therefore, the objective of this study was to assess the impacts of conversion of conventional tillage (CT) to no-till (NT) with a mixture of cover crops and green manure as nutrient uptake in a fertilized melon (Cucumis melon) in a semi-arid region of Brazil. Two fields experimental involved randomized blocks design, in a split-plot scheme, with four replication treatments included three types of cover crops and two tillage systems (conventional and no-till). Subsamples of plant cocktails were used to assess the biomass production. Soil samples were analyzed during the melon growth for determination of soil moisture by the frequency domain reflectometry (FDR) probe. Soil solution samples were extracted with ceramic cups from each treatment, and analyzed for determination of TP, Na+, Ca2+, Mg2+, S and NO3-N. Mobility of these elements was assessed in relation to management and different cover crops. The data showed slight or no strong effect of plant cocktails composition on nutrients dynamics in soil under melon. However, without incorporation of biomass and slower decomposition of residue mulch retained on the surface, risks of leaching losses were lower under NT than CT system. A higher concentration of cations in CT (for example, Ca+2 42.07 mg L-1) may be attributed to high soil moisture content and faster rate of mineralization of the biomass incorporated. Concentration of P was higher in top soil layers depth in NT system (6.65 mg L-1 at 15 cm) because of the deposition of plant cocktail biomass in soil surface with low SOM contents placement of fertilizer, and possible formation of calcium phosphate with low solubility. Relatively, high concentration of NO3-N (~ 60.16 mg L-1) in CT was attributed to increase in decomposition of soil organic matter (SOM) and crop residues incorporated into the soil.
650 $aSoil
650 $aCaatinga
650 $aCucumis Melo
650 $aFertilidade do solo
650 $aManejo do Solo
650 $aMelão
650 $aPlanta
650 $aPlantio Direto
650 $aSolo
653 $aAdubação orgânica
653 $aMacronutrientes
700 1 $aTEIXEIRA FILHO, J.
700 1 $aGIONGO, V.
700 1 $aSIMOES, W. L.
700 1 $aLAL, R.
773 $tAfrican Journal of Agricultural Research$gv. 11, n. 4, p. 234-246, jan. 2016.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Semiárido (CPATSA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
