期刊论文详细信息
Bragantia | |
Agronomical performance and profitability of exploitation systems in four rubber tree clones in São Paulo state | |
Juliano Quarteroli Silva2  Paulo De Souza Gonçalves1  João Alexio Scarpare Filho1  Reginaldo Brito Da Costa1  | |
[1],Universidade de São Paulo Escola Superior de Agricultura Luiz de Queiroz Curso de Pós-Graduação em FitotecniaPiracicaba SP ,Brasil | |
关键词: Hevea brasiliensis; natural rubber; tapping; ethephon; tapping panel dryness; Hevea brasiliensis; borracha natural; sangria; ethephon; seca do painel; | |
DOI : 10.1590/S0006-87052010000400009 | |
来源: SciELO | |
【 摘 要 】
The exploitation or tapping of the rubber tree, Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell. Arg. is one of the most important cultural practices in determining useful life, yield and accounts for a major part of the total production costs in rubber farming. The objective of this work was to evaluate yield performance and economic aspects of rubber tree clones submitted to diverse tapping systems. The trial was placed in Guararapes city, São Paulo State, Brazil, in a randomized block design with split-plot in time. The plots consisted of the IAN 873, PR 261, RRI M 600 and RRI M 701 clones. The tapping systems consisted the subplots, where: ½S = tapping of half spiral cut; d/2, d/3, d/4, d/5 and d/7 = tapping every 2, 3, 4, 5 and 7 days, respectively; 11 m/y = tapping during eleven months per year; ET = ethephon (stimulant); Pa = panel application; La = lace application; 8/y = eight applications per year. The five experimental years were the sub-subplots and the ½S d/2 system was used as control. The analyzed variables were girth, dry rubber yield, tapping panel dryness and economic profitability. The ½S d/3 ET 2.5% and ½S d/4 ET 2.5% tapping systems provide the highest yield and profitability per hectare per year for the RRI M 600 and PR 261 clones. For the IAN 873 and RRI M 701 clones the yield superiority occurs in high tapping frequency; however the best profitability is obtained in the ½S d/7.ET 2.5% system.【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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