| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
|
Data corrente: |
03/06/1996 |
|
Data da última atualização: |
03/06/1996 |
|
Autoria: |
JONES, R. M.; HARGREAVES, J. N. G. |
|
Título: |
Improvements to the dry-weight-rank method for measuring botanical composition. |
|
Ano de publicação: |
1979 |
|
Fonte/Imprenta: |
Grass and Forage Science, v.34, p.181-189, 1979. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Two modifications have been made to the dry-weight-rank (DWR) method for measuring botanical composition. One previous limitation of the method have been that it gives biased results in pastures where there is a consistent relation between quadrat dry matter yield and the order in which species are ranked for yield. A weighting factor, applied to the DWR multipliers and based on pasture yield in quadrats estimated for dry weight rank, can correct for this bias. In routine pasture sampling quadrat yields are often visually estimated in the same quadrats in which composition is assessed by DWR. These estimated quadrat yieldscan then be used as weighting factors to improve the accuracy of DWR as well as to estimate pasture yield. Dry weight rank has also beenunsuited to pastures which are heavily dominated by one species but this problem can be lessened by assigning more than one rank to the dominant species, a method referred to as "cumulative" ranking". Both these modifications were found to give a more accurate estimate of composition using data from a wide range of tropical and temperate pastures.On the other hand, creation of new DWR multipliers for particular cases was inadvisable. All data made available for this study and the original data were used to derive new multipliers... |
|
Palavras-Chave: |
Forrageiras. |
|
Thesaurus Nal: |
forage. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01742naa a2200157 a 4500
001 1077320
005 1996-06-03
008 1979 bl --- 0-- u #d
100 1 $aJONES, R. M.
245 $aImprovements to the dry-weight-rank method for measuring botanical composition.
260 $c1979
520 $aTwo modifications have been made to the dry-weight-rank (DWR) method for measuring botanical composition. One previous limitation of the method have been that it gives biased results in pastures where there is a consistent relation between quadrat dry matter yield and the order in which species are ranked for yield. A weighting factor, applied to the DWR multipliers and based on pasture yield in quadrats estimated for dry weight rank, can correct for this bias. In routine pasture sampling quadrat yields are often visually estimated in the same quadrats in which composition is assessed by DWR. These estimated quadrat yieldscan then be used as weighting factors to improve the accuracy of DWR as well as to estimate pasture yield. Dry weight rank has also beenunsuited to pastures which are heavily dominated by one species but this problem can be lessened by assigning more than one rank to the dominant species, a method referred to as "cumulative" ranking". Both these modifications were found to give a more accurate estimate of composition using data from a wide range of tropical and temperate pastures.On the other hand, creation of new DWR multipliers for particular cases was inadvisable. All data made available for this study and the original data were used to derive new multipliers...
650 $aforage
653 $aForrageiras
700 1 $aHARGREAVES, J. N. G.
773 $tGrass and Forage Science$gv.34, p.181-189, 1979.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Uva e Vinho. |
|
Data corrente: |
15/08/2011 |
|
Data da última atualização: |
15/08/2011 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
B - 4 |
|
Autoria: |
KLOCK, C. L.; JOHANN, L.; BOTTON, M.; FERLA, N. J. |
|
Afiliação: |
Crisna Letícia Klock, UNIVATES; Liana Johann, PUCRS; MARCOS BOTTON, CNPUV; Noeli Juarez Ferla, UNIVATES. |
|
Título: |
Mitefauna (Arachnida: Acari) associated to grapevine, Vitis vinifera L. (Vitaceae), in the municipalities of Bento Gonçalves and Candiota, Rio Grande do Sul, Brazil. |
|
Ano de publicação: |
2011 |
|
Fonte/Imprenta: |
Check List, São Paulo, v. 7, n. 4, p. 522-536, 2011 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The mitefauna associated to Merlot and Chardonnay grapevine cultivars and associated plants in the municipalities of Bento Gonçalves and Candiota, Rio Grande do Sul was investigated. The study was developed between October 2006 and September 2007, where 20 grapevine plants were randomly chosen from each municipality and monthly sampled. Three leaves of each plant were taken. A total of 11,598 mites belonging to 14 families and to 52 species were found. Fifty-nine percent of the total specimens were collected in Candiota, being 93% associated to the Merlot cultivar. Higher species richness was observed on associated plants. Phytoseiidae showed the highest species richness, with ten species, and Eriophyidae showed the highest abundance, with 8,675 specimens. Calepitrimerus vitis (Nalepa, 1905) and polyphagotarsonemus latus (Banks, 1904) were the most common phytophagous mites, while Neoseiulus californicus (McGregor, 1954) and Pronematus anconai (Baker, 1943) were the most common predators. |
|
Palavras-Chave: |
Bento Gonçalves; Candiota; Chardonnay; Merlot; Rio Grande do Sul. |
|
Thesagro: |
Ácaro; Praga de planta; Uva; Viticultura. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/39826/1/KLOCK-CheckList-v7n4p522-2011.pdf
|
|
Marc: |
LEADER 01796naa a2200265 a 4500
001 1897981
005 2011-08-15
008 2011 bl uuuu u00u1 u #d
100 1 $aKLOCK, C. L.
245 $aMitefauna (Arachnida$bAcari) associated to grapevine, Vitis vinifera L. (Vitaceae), in the municipalities of Bento Gonçalves and Candiota, Rio Grande do Sul, Brazil.$h[electronic resource]
260 $c2011
520 $aThe mitefauna associated to Merlot and Chardonnay grapevine cultivars and associated plants in the municipalities of Bento Gonçalves and Candiota, Rio Grande do Sul was investigated. The study was developed between October 2006 and September 2007, where 20 grapevine plants were randomly chosen from each municipality and monthly sampled. Three leaves of each plant were taken. A total of 11,598 mites belonging to 14 families and to 52 species were found. Fifty-nine percent of the total specimens were collected in Candiota, being 93% associated to the Merlot cultivar. Higher species richness was observed on associated plants. Phytoseiidae showed the highest species richness, with ten species, and Eriophyidae showed the highest abundance, with 8,675 specimens. Calepitrimerus vitis (Nalepa, 1905) and polyphagotarsonemus latus (Banks, 1904) were the most common phytophagous mites, while Neoseiulus californicus (McGregor, 1954) and Pronematus anconai (Baker, 1943) were the most common predators.
650 $aÁcaro
650 $aPraga de planta
650 $aUva
650 $aViticultura
653 $aBento Gonçalves
653 $aCandiota
653 $aChardonnay
653 $aMerlot
653 $aRio Grande do Sul
700 1 $aJOHANN, L.
700 1 $aBOTTON, M.
700 1 $aFERLA, N. J.
773 $tCheck List, São Paulo$gv. 7, n. 4, p. 522-536, 2011
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Uva e Vinho (CNPUV) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
