Rubber Trees
Mostrando 13-24 de 31 artigos, teses e dissertações.
-
13. Avaliação de clones de seringueira (Hevea spp.) em Piracicaba-SP / Rubber tree (Hevea spp.) clones evaluation in Piracicaba - SP
Piracicaba-SP is on the extreme southern region suitable for rubber planting in Brazil, with little information on the performance of clones under its environmental conditions. The performance of growth and yield of ten rubber tree clones (Hevea spp.) were evaluated. The studied clones were CATI 21, IAC 15, IAN 873, GT 1, PB 235, PB, 252, PR 107, PR 261, RRI
Publicado em: 2008
-
14. VariaÃÃo sazonal da atividade da rubisco e das enzimas de sÃntese e hidrÃlise da sacarose em plantas de seringueira [Hevea brasiliensis (Willd ex. Adr de Juss.) Muell.-Arg], em Lavras/MG / Seasonal variation of Rubisco and sucrose synthesis and hydrolisys enzymes activities in rubber trees [Hevea brasiliensis (Willd ex. Adr. de Juss.) Muell.-Arg], in Lavras, MG.
The growth of rubber tree cultivation in Brazil has happened because of growing of natural rubber market. With aim to escape of âSouth American leaf blightâ â a common disease in amazonian region â the rubber tree expansion has privileged no traditional regions in Brazil. In Minas Gerais, where rubber tree cultivation is still incipient, new researches a
Publicado em: 2007
-
15. Crescimento e produtividade do cafeeiro sombreado e a pleno sol / Growth and productivity of coffee plants under shade and full sun
Coffee is an important exporting agricultural commodity in the world and the Brazil is in a leading position as the worlds largest exporting producer. However, the product is quite vulnerable to market price floating. In that scenario, diversifying products can be an important strategy to keep the economic equilibrium of the property. The aim of this study
Publicado em: 2006
-
16. Genetic variation in growth traits and yield of rubber trees (Hevea brasiliensis) growing in the Brazilian state of São Paulo
Analysis of variance and covariance was preformed on growth traits (stem girth, bark thickness, total height gain and rubber yield) of 22 open-pollinated progenies of the rubber tree Hevea brasiliensis from an Asian Hevea collection introduced to Agronomic Institute (Instituto Agronômico, Campinas, São Paulo, Brazil; IAC) in 1952. This progeny trial was re
Genetics and Molecular Biology. Publicado em: 2005-12
-
17. Resilience of soil structure of an Ultisol under different land uses, at the Zona da Mata, MG / Resiliência da estrutura em Argissolo sob diferentes usos, na Zona da Mata de Minas Gerais
Soil structure has a great importance for agricultural production, since it exerts marked influences on carbon cycles, nutrient cycling an water behavior, as well as to soil gas which are plant development limiting factors. Thus, this work aimed to verify the resilience of an Ultisol under different land uses. The work was located in Visconde do Rio Branco,
Publicado em: 2005
-
18. Clonal stability of tree dryness in Hevea brasiliensis Muell. Arg.
Clonal stability of tree dryness was evaluated in eleven clones of Hevea brasiliensis at the Rubber Research Institute of Nigeria. The experimental design was the randomized complete block with three replicates and ten trees per replicate. The clones were evaluated in three locations. Four stability parameters were applied. The stability parameters were: env
Genetics and Molecular Biology. Publicado em: 2004
-
19. Selection and genetic gains for juvenile traits in progenies of Hevea in São Paulo State, Brazil
Five yield traits were investigated in three-year-old progenies from open-pollinated rubber trees [Hevea brasiliensis (Willd. ex Adr. de Juss) Muell.-Arg.]. Twenty progenies were evaluated in a randomized, complete block design replicated three times using 10 plants per linear plot at the North Central Experimental Station in Pindorama, São Paulo State, Bra
Genetics and Molecular Biology. Publicado em: 2004
-
20. Biologia de Agistemus floridanus Gonzalez (Acari, Stigmaeidae)
The rubber tree (Hevea brasiliensis Muell. Arg.) (Euphorbiaceae) is attacked by various species of phytophagous mites in Brazil. Studies conducted in the State of Mato Grosso showed the presence of Agistemus floridanus Gonzalez, 1965 (Stigmaeidae) on rubber trees, associated with the mite Tenuipalpus heveae Baker, 1945. The aim of this work was to study the
Revista Brasileira de Zoologia. Publicado em: 2003-06
-
21. Oviposição dos ácaros predadores Agistemus floridanus Gonzalez, Euseius concordis (Chant) e Neoseiulus anonymus (Chant & Baker) (Acari) em resposta a diferentes tipos de alimento
Phytoseiidae and Sigmaeidae are the most common predatory mites on rubber tree leaves in the State of Mato Grosso, associated with phytophagous mites of the families Eriophyidae, Tenuipalpidae and Tetranychidae. The aim of this work was to compare the effect of different kinds of food, including different species of mites commonly found on the rubber tree in
Revista Brasileira de Zoologia. Publicado em: 2003-03
-
22. Assessment of sugarcane cultivation in agroforestry systems in Piracicaba, SP, Brazil. / Avaliação do cultivo de cana-de-açúcar em sistemas agroflorestais em Piracicaba, SP.
In Piracicaba, many smallholders grow sugarcane in areas of high solpe, but the mechanization of the harvest process has made inviable its cultivation under this situation. Agroforestry systems (AFs) are an alternative that may join the cultivation of the crop under this scenario with conservation of natural resources. However, there is lack of research of i
Publicado em: 2003
-
23. Comunidades de aranhas (Araneae) em cultivos de seringueira (Hevea brasiliensis Muell. Arg.) no Estado de São Paulo
The spider fauna composition of three rubber tree commercial plantations in the Northwest part of São Paulo State, Brazil, was characterized for both canopy and litter strata. On seven occasions from April 2000 to October 2001, samples were taken by beating sheet and hand capture, resulting in a total of 946 individuals, belonging to 24 families and 119 spe
Revista Brasileira de Zoologia. Publicado em: 2002-09
-
24. Diversidade de ácaros (Acari, Arachnida) em seringueiras (Hevea brasiliensis Muell. Arg., Euphorbiaceae) na região noroeste do Estado de São Paulo, Brasil
The mites of three rubber tree cultures (Cedral, Pindorama and Taquaritinga) in order to determine the abundance of populations, the richness, the diversity and the degree of similarity among the communities was studied. Twenty one species were found, five of which were common to the three cultures. The richness and the abundance were greatest at the beginni
Revista Brasileira de Zoologia. Publicado em: 2002-03