| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Florestas; Embrapa Meio-Norte. |
|
Data corrente: |
06/06/1995 |
|
Data da última atualização: |
17/08/2015 |
|
Autoria: |
GRECO, A. R. |
|
Título: |
Effect of root diseases and site preparation on the growth and nutrient status of bareroot and container grown douglas-fir seedlings. |
|
Ano de publicação: |
1978 |
|
Fonte/Imprenta: |
1978. |
|
Páginas: |
71 f. |
|
Idioma: |
Inglês |
|
Notas: |
Thesis (Master of Science) - University of Washington, Washington. |
|
Conteúdo: |
Bareroot seedlings had higher survival than container seedlings when burning or scarificatiion was used as site treatments. In the unburned (control) treatment there was no apparent difference in survival of bareroot or container seedlings. Shoot biomass and needle nitrogen content were significantly higher for bareroot seedlings in the burned and acarified treatments versus the unburned treatment. Seedlings in the unburned treatment. Seedlings in the unburned treatment had lower levels of ectomycorrhizal root tips, shorter mean needle length, lower mean height increment, narrower mean root collar diameter, and higher number of seedlings suspected to be infectted with P. weirii compared to the seedlings grow in the scarified and burned treatments, but these variables were not statiscally significant. It appears that when Douglas-fir bareroot seedlings are used in artificial regeneration, either burning or scarification rather thanunburned should be the recommended site treatment pratice. When container Douglas-fir seedlings are used for regeneration, it appears that unburned treatment will result in the highest survival of seedlings. There was no significant diference in needle nutrient content, number of ectomycorrhizal root tips, or seedling morphological measurements made on container seedlings in all three treatments. Survival of seedlings was the major variable affecting the choice of site treatment most suitable for container seedling regeneration. Seedling vigor was directly related to the number of ectomycorrhizal root tips. Presence of Rhizina undulata did appear to have any measurable effect on seedling growth or survival in the burned site. The effect of site treatment on the presence of Phellinus weirii in the bareroot seedlings was apparent in the unburned site. The seedlingsthat showed the highest number of suspected P. weirii had the lowest number of mycorrhizal root tips, lower needle N content,and significantlylower shoot biomass weight in comparison to the burned and scarified treatments. The effect of P. weirii on container seedlings was not as apparent in the three different treatments. Scarification appeared to have limiting effects on P. weirii by reducing below ground residues in which the fungus survive. MenosBareroot seedlings had higher survival than container seedlings when burning or scarificatiion was used as site treatments. In the unburned (control) treatment there was no apparent difference in survival of bareroot or container seedlings. Shoot biomass and needle nitrogen content were significantly higher for bareroot seedlings in the burned and acarified treatments versus the unburned treatment. Seedlings in the unburned treatment. Seedlings in the unburned treatment had lower levels of ectomycorrhizal root tips, shorter mean needle length, lower mean height increment, narrower mean root collar diameter, and higher number of seedlings suspected to be infectted with P. weirii compared to the seedlings grow in the scarified and burned treatments, but these variables were not statiscally significant. It appears that when Douglas-fir bareroot seedlings are used in artificial regeneration, either burning or scarification rather thanunburned should be the recommended site treatment pratice. When container Douglas-fir seedlings are used for regeneration, it appears that unburned treatment will result in the highest survival of seedlings. There was no significant diference in needle nutrient content, number of ectomycorrhizal root tips, or seedling morphological measurements made on container seedlings in all three treatments. Survival of seedlings was the major variable affecting the choice of site treatment most suitable for container seedling regeneration. Seedling vigor was ... Mostrar Tudo |
|
Palavras-Chave: |
Douglas-fir. |
|
Thesagro: |
Crescimento; Doença; Muda; Nutrição; Nutriente; Raiz; Tratamento. |
|
Thesaurus Nal: |
Pseudotsuga menziesii; seedlings. |
|
Categoria do assunto: |
--
X Pesquisa, Tecnologia e Engenharia |
|
Marc: |
LEADER 02985nam a2200253 a 4500
001 1304703
005 2015-08-17
008 1978 bl uuuu m 00u1 u #d
100 1 $aGRECO, A. R.
245 $aEffect of root diseases and site preparation on the growth and nutrient status of bareroot and container grown douglas-fir seedlings.
260 $a1978.$c1978
300 $a71 f.
500 $aThesis (Master of Science) - University of Washington, Washington.
520 $aBareroot seedlings had higher survival than container seedlings when burning or scarificatiion was used as site treatments. In the unburned (control) treatment there was no apparent difference in survival of bareroot or container seedlings. Shoot biomass and needle nitrogen content were significantly higher for bareroot seedlings in the burned and acarified treatments versus the unburned treatment. Seedlings in the unburned treatment. Seedlings in the unburned treatment had lower levels of ectomycorrhizal root tips, shorter mean needle length, lower mean height increment, narrower mean root collar diameter, and higher number of seedlings suspected to be infectted with P. weirii compared to the seedlings grow in the scarified and burned treatments, but these variables were not statiscally significant. It appears that when Douglas-fir bareroot seedlings are used in artificial regeneration, either burning or scarification rather thanunburned should be the recommended site treatment pratice. When container Douglas-fir seedlings are used for regeneration, it appears that unburned treatment will result in the highest survival of seedlings. There was no significant diference in needle nutrient content, number of ectomycorrhizal root tips, or seedling morphological measurements made on container seedlings in all three treatments. Survival of seedlings was the major variable affecting the choice of site treatment most suitable for container seedling regeneration. Seedling vigor was directly related to the number of ectomycorrhizal root tips. Presence of Rhizina undulata did appear to have any measurable effect on seedling growth or survival in the burned site. The effect of site treatment on the presence of Phellinus weirii in the bareroot seedlings was apparent in the unburned site. The seedlingsthat showed the highest number of suspected P. weirii had the lowest number of mycorrhizal root tips, lower needle N content,and significantlylower shoot biomass weight in comparison to the burned and scarified treatments. The effect of P. weirii on container seedlings was not as apparent in the three different treatments. Scarification appeared to have limiting effects on P. weirii by reducing below ground residues in which the fungus survive.
650 $aPseudotsuga menziesii
650 $aseedlings
650 $aCrescimento
650 $aDoença
650 $aMuda
650 $aNutrição
650 $aNutriente
650 $aRaiz
650 $aTratamento
653 $aDouglas-fir
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Florestas (CNPF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 1 | |
| 1. |  | SCHAFASCHEK, T. P.; ARIOLI, C. J.; BOTTON, M.; DAMBRÓZ, R. N.; BOLZANI, R.; STEFANIAK, L. C.; PICOLLI, C. Avaliação do cultivo de plantas apícolas como alternativa alimentar para colônias de Apis mellifera (Hymenoptera: apidae) no período de maturação da uva. Mensagem Doce, São Paulo, n. 116, p. 7, maio 2012. Resumo apresentado no 19º Congresso Brasileiro de Apicultura e 5º Congresso Brasileiro de Meliponicultura, Gramado, RS, de 22 a 26 de maio de 2012.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
|    |
| Registros recuperados : 1 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
