Viabilidade econômica de diferentes sistemas de sangria em clones de seringueira

Silva, Juliano Quarteroli; Souza, Mario Ivo Tavares de; Gonçalves, Paulo de Souza; Aguiar, Adriano Tosoni da Eira; Gouvêa, Lígia Regina Lima; Pinotti, Raquel Nakazato

doi:10.1590/s0100-204x2007000300007

Cited by 7 publications

(5 citation statements)

References 3 publications

(1 reference statement)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The results of this experiment suggest that for less intensive tapping systems the clones that responded positively to stimulation with ethefon should be preferred, as the traditional RRIM 600 or PB 235 and IAC 41, given that these clones obtained significant lower yields in d/7 without stimulation. Silva et al 20,21 obtained greater productivity and profitability with the clone RRIM 600 in São Paulo upland conditions applying the tapping system ½ S d/3 ET 2.5% and reported that the system ½ Sd/7 ET 2.5% produced about 28% less. However, the productivity of this clone in the Northwest of Paraná was 10% higher in the system ½ S d/7 ET 2.5% as compared to the ½ S d/4 ET 2.5% and 40% more compared to the ½ S d/4 without stimulation ( Table 7), so that the utilization of tapping system ½ S d/7 ET 2.5% can offer advantage in the conditions of Paraná State, with respect to production and optimization of manpower.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Rubber Tree Clones Under Different Tapping Systems in Northwestern Paraná State, Brazil.

Pereira

Leal

Ramos

2018

Braz. arch. biol. technol.

View full text Add to dashboard Cite

This study evaluates the potential of rubber tree clones (Hevea spp.) under four tapping systems for the Northwestern region of the State of Paraná with the objective of enhance genetic diversification and increase natural rubber production in this new and promising region for rubber tree cultivation by selecting the better combination of clone and tapping system. The experiment was installed at Guanabara Farm, municipality of Paranapoema, Paraná State, in a split-plot randomized complete blocks experimental design with three replications.

show abstract

Section: Resultsmentioning

confidence: 99%

Evaluation of Rubber Tree Clones Under Different Tapping Systems in Northwestern Paraná State, Brazil.

Pereira

Leal

Ramos

2018

Braz. arch. biol. technol.

View full text Add to dashboard Cite

show abstract

“…Com relação à incidência de seca de painel, os percentuais finais de plantas situaram-se dentro da normalidade, com valores abaixo de 5% (Silva et al, 2007), exceto para a combinação PB 311 x IAN 6158. Ao se compararem os efeitos nos clones de copa e painel, a maior seca de painel foi verificada sob as copas de IAN 6158 e F 4512, o que evidencia a maior sensibilidade à doença fisiológica, seca dos painéis, de grande importância na heveicultura.…”

Section: Resultsunclassified

Desempenho de clones de copa e painel de seringueira no sudoeste do Estado do Mato Grosso

Moraes¹,

Moraes

Moreira

et al. 2013

Pesq. agropec. bras.

View full text Add to dashboard Cite

Resumo -O objetivo deste trabalho foi avaliar o desempenho de 12 combinações de três clones de painel (PB 311, PB 314 e RRIM 600) com quatro clones de copa (F 4512, MDF 180, IAN 6158 e IAN 6543) de seringueira cultivados no sudoeste do Estado do Mato Grosso. Utilizou-se o delineamento experimental de blocos ao acaso, com quatro repetições. Foram avaliados: produção de borracha seca, percentagem de plantas aptas à sangria, secamento de painel, estado nutricional, teor de borracha seca, plasticidade Wallace (P 0 e P 30 ), índice de retenção de plasticidade e viscosidade Mooney. As combinações das copas IAN 6543 e MDF 180 com os painéis PB 311, RRIM 600 e PB 314 apresentaram estado nutricional adequado, com produtividade de borracha seca acima de 1,41 Mg ha -1 por ano. O clone de copa IAN 6158 propiciou, em oito anos, as maiores quantidades de plantas aptas à sangria. As combinações painel/copa apresentaram baixa incidência de secamento de painel, exceto PB 311 x IAN 6158. As borrachas das 12 combinações painel/copa apresentam boa resistência à degradação térmica e alta retenção de plasticidade.Termos para indexação: Hevea, estado nutricional, plasticidade, produção de borracha seca, secamento de painel, viscosidade. Performance of rubber tree crown and panel clones in the southwest of the state of Mato Grosso, BrazilAbstract -The objective of this work was to evaluate the performance of 12 combinations of three rubber tree panel clones (PB 311, PB 314, and RRIM 600) and four crown clones (F 4512, MDF 180, IAN 6158, and IAN 6543) grown in the southwest of the state of Mato Grosso, Brazil. A randomized complete block design was used, with four replicates. The following were evaluated: dry rubber yield, percentage of tappable trees, tapping panel dryness, nutritional status, dry rubber content, Wallace plasticity (P 0 and P 30 ), plasticity retention index, and Mooney viscosity. The combinations of the crowns IAN 6543 and MDF 180 with the panels PB 311, RRIM 600, and PB 314 showed adequate nutritional status, with dry rubber yield greater than 1.41 Mg ha -1 per year. The crown clone IAN 6158 provided, over eight years, the highest number of plants suitable for tapping. The panel/crown combinations showed low incidence of tapping panel dryness, except PB 311 x IAN 6158. The rubber of the 12 panel/crown combinations shows good resistance to thermal degradation and high plasticity retention.

show abstract

“…It is believed that the productive increments were not only greater with the increase of the doses due to the percentage of panel drying in these plants. Drying renders them unproductive for an indeterminate period (Silva et al, 2007), thus reducing the average production of the rubber tree. The lowest productive increase in clone PB217 is associated with the higher percentage of tapping panel dryness (Table 1).…”

Section: Discussionmentioning

confidence: 99%

Stimulation of Latex Production in Seringueira (Hevea Brasiliensis L.) With Etrhel Doses

2018

View full text Add to dashboard Cite

The use of the Ethrel® stimulant on rubber cultivation has become essential to ensure greater rubber production. When applied on the cut of the tree, this stimulant releases the ethylene gas that causes an increase of the exudation period of the latex flow. Dilutions and applications should be performed correctly so that they do not cause tapping panel dryness, which would leave the plant unproductive for a long time. Thus, the objective of this study was to evaluate the effects of increasing doses of ethrel on tapping panel dryness and rubber production of rubber tree clones. Three experiments were conducted using a randomized block design with four treatments (ethrel doses) and three replicates. The clones used were RRIM600, PR255 and PB217 submitted to doses of the stimulant Ethrel 0%, 2.5%, 3.3% and 5% with an interval of application of 30 days. The d/7 bleeding system was used. The productive performance was evaluated monthly and the total of plants with tapping panel dryness at the end of the work. All clones presented a linear positive response to increasing doses. The dose of ethrel 5% favors higher rubber yields in the three evaluated clones, but is associated with high percentage of drying. Thus, it was concluded that the production of rubber is affected positively with the increase of ethrel doses, but this increase causes a higher incidence of panel drying. Thus, it is recommended to use the ethrel 2.5% dose so the production is guaranteed without causing the tapping panel dryness.

show abstract

Viabilidade econômica de diferentes sistemas de sangria em clones de seringueira

Cited by 7 publications

References 3 publications

Evaluation of Rubber Tree Clones Under Different Tapping Systems in Northwestern Paraná State, Brazil.

Evaluation of Rubber Tree Clones Under Different Tapping Systems in Northwestern Paraná State, Brazil.

Desempenho de clones de copa e painel de seringueira no sudoeste do Estado do Mato Grosso

Stimulation of Latex Production in Seringueira (Hevea Brasiliensis L.) With Etrhel Doses

Contact Info

Product

Resources

About