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Registros recuperados: 4
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Agricultural systems in Amazonia depend on the management of mycorrhizal fungi. Repositório Alice
FELDMANN, F.; IDCZAK, E.; NUNES, C. D. M..
A large number of useful tropical plant species are dependent on mycorrhizal fungi. Without the fungal symbionts they show growth depression and lower tolerance to biotic and abiotic stresses. In plant production systems, common management practices normally result in symbiosis deficits. In tropical regions where the system of shifting cultivation is practiced, the fallow period was thought to have a positive regulating effect on the mycorrhizal situation. It's showed that between three and eight years of fallow there is an increase of the inoculum potential in the soils but the effectivity of the fungal populations remains very low in comparison to the populations from natural sites. The need to manage the mycorrhizal fungi in situ in the field is...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Multiplo cultivo; Brasil; Amazonas; Manaus; Management; Conservação do Solo; Floresta Tropical Úmida; Manejo; Micorriza; Multiple cropping; Mycorrhizae; Soil conservation; Tropical rain forests; Vesicular arbuscular mycorrhizae.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/668963
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Development of peach palm (Bactris gasipaes H.B.K.) in mixed cropping systems. Repositório Alice
MACEDO, J. L. V.; CRUZ, A. A.; ARAUJO, R. de C.; MARTINS, G. C..
The Amazon region has a great variety of native species with economic potential, notably peach palm. The development of peach palm was monitored in mixed cropping systems treated by application of 30% or 100% of the recommended fertilizer dose and inoculation or not of seedlings wth VA-mycorrhizal fungi. The parameters evaluated were height of the plants at 12 and 18 months, number of shoots/plant at 12 months, diameter of the stem and palm heart production at 18 months. As regards height of the plants and stem diameters, there were significant differences between the treatments with 30% and 100% fertilizer in the two systems. However, within the two fertilization levels, there was no significant difference between the treatments with and without...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Pupunha; Bactris gasipaes; Agrofloresta; Multiplo cultivo; Produtividade; Brasil; Amazonas; Mixed cropping; Multiple cropping; Yields.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/667216
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Evaluation of manioc (Manihot esculenta Crantz) cultivation in mixed cropping systems. Repositório Alice
MARTINS, G. C.; MACEDO, J. L. V.; ARAUJO, R. C..
Yields and survival rates will be presented for three manioc cultivars(Pao IM 226, Vinagre IM 157 and Mandioca IM 116), planted between the rows in two mixed cropping systems, which were treated by application of 30% or 100% of the recommended fertilizer dose and inoculation or not with mycorrhizal fungi spores. With regard to yield, there is no statistically significant difference between the treatments viewed in isolation. However, there are statistically significant differences between the cultivars Pao (10.6 tons/ha) and Vinagre (5.5 tons/ha) in system 2; between 100% fertilization (5.2 tons/ha) and 30% fertilization (3.7 tons/ha) in system 3, and between the Pao cultivars in systems 2 (10.6 tons/ha) and 3 (5.4 tons/ha). The resprouting rates of the...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Agrofloresta; Multiplo cultivo; Brasil; Amazonas; Mandioca; Manihot Esculenta; Produção; Produtividade; Cassava; Multiple cropping; Yields.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/667218
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Utilization of abandoned areas in Amazonia by polycultures of perennial useful plants. Repositório Alice
FELDMANN, F.; LIEBEREI, R.; PREISINGER, H.; GASPAROTTO, L..
Degraded fallow areas of primarily monocultural plantations will be transferred into a locally-adapted form of utilization through special consideration of soil microbiological factors (fungal and bacterial symbionts). In accordance with the heterogeneity of natural plant communities, polycultures of several perennial and annual ecologically adapted useful plants are installed. During the installation phase mycorrhizal fungi are introduced as importante biological factors to optimize the ecological fitness of the plant material. After the implantation of the polyculture the spontaneous secondary vegetation is managed carefully to reach a jointly beneficial growth of the secondary vegetation with the useful plants. In this type of naturally enriched...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Multiplo cultivo; Brasil; Amazonas; Manaus; Tropical rain forest; Soil conservatio; Reclamation; Conservação do Solo; Floresta Tropical Úmida; Recuperação do Solo; Multiple cropping.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/668962
Registros recuperados: 4
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