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Trunk contraction ofHevea brasiliensis due to tapping

Kontrakce kmeneHevea brasiliensis v důsledku krvácení

Contraction du tronc de l'Hevea brasiliensis à cause de la saignée

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Biologia Plantarum

Abstract

Determination of bark contraction due to tapping made simultaneously at different positions on the trunk ofHevea trees (young PR 107, S/2 ↓) provided information about the flow area and the speed of contration spreading.

The relation between truck contraction at the given distance from the cut and the amount of latex tapped was experessed in mathematical terms. A quantitative relation was also established between the yields of latex and the linear dimension of flow areas in longitudinal direction below the middle of tapping cut.

From the contraction curves it is deduced that the lateral flow of latex becomes relatively more important with increasing yields.

Abstract

Stanovení kontrakce kůry na kmeni kaučukovníků (mladé PR-107, S/2), ↓ provedené během „krvácení” (výtoku latexu) v různých vzdálenostech od zářezu současně, poskytlo informace ovlastnostech tzv. pohybové oblasti a o rychlosti šíření kontrakce.

Vztah mezi smrštěním kmene v dané vzdálenosti od zářezu a mezi množstvím vyteklého latexu byl vyjádřen matematicky. Kvantitativně byl formulován také vztah mezi výnosy latexu alineárním rozměrem pohybové oblasti v longitudinálním směru pod středem zářezu.

Z kontrakěních křivek bylo vyvozeno, žo podíl laterálního toku latexu v celkovém výnosu relativně (i absolutně) vzrůstá v závislosti na zvětšujících se množstvích latexu vyteklého ze zářezu.

Résumé

Détermination de la contraction de l'écorce des jeunes hévéas (PR-107, S/2 ↓), effectuée pendant la saignée, aux differentes distances de l'encoche simultanément, a fournie des informations de l'aire de déplacement et de la vitesse de déplacement du latex dans l'écorce.

La rélation entre la contraction du tronc à la distance donnée de l'encoche et la quantité du latex écoulé a été exprimée par une formule mathématique. La rélation quantitative a été établie aussi entre les rendements de latex et le dimension linéaire de l'aire de déplacement dans le sens longitudinal au dessous de milieu de l'encoche.

Des courbes de la contraction a été déduit que la participation de l'afflux latéral dans le rendement total augmente relativement (aussi bien qu'absolument) en fonction des quantités croissantes du latex écoulé de l'encoche.

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References

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Author notes

  1. W. L. Resing

    Present address: Rubber Research Institute of Cambodia, B. P. 11-Kompong Cham, Khum de Chup, Cambodia

  2. J. Luštinec

    Present address: Institute of Experimental Botany, Czechoslovak Academy of Sciences, Research Station, Alsovice 69, Jablonec n.N., Czechoslovakia

  3. J. Simmer

    Present address: Laboratory of Algology, Institute of Microbiology, Czechoslovak Academy of Sciences, Dukelská 145, Treboň, Czechoslovakia

Authors and Affiliations

  1. Rubber Research Institute of Cambodia, B. P. 11-Kompong Cham, Khum de Chup, Cambodia

    J. Luštinec & J. Simmer

Authors
  1. J. Luštinec
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  2. J. Simmer
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  3. W. L. Resing
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Additional information

J. L. was appointed at the Rubber Research Institute of Cambodia from 1964 till 1967 by the International Atomic Energy Agency.

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Luštinec, J., Simmer, J. & Resing, W.L. Trunk contraction ofHevea brasiliensis due to tapping. Biol Plant 11, 236–244 (1969). https://doi.org/10.1007/BF02920802

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  • DOI: https://doi.org/10.1007/BF02920802

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