EFFECTS OF MANAGEMENT PRACTICES AND TAPPING SYSTEM ON LATEX AND DRY RUBBER YIELDS OF RUBBER TREE CLONE RRIT 251

Authors: B. Wiangsamut, M. Koolpluksee, C. Makornpas, C. Chaichuay, R. Chaichuay, M.E.L. Wiangsamut
Journal: Journal of Animal and Plant Sciences (JAPS)
ISSN: 1018-7081 (Print), 2309-8694 (Online)
Volume: 34  Issue: 1  Pages: 50-61
Year: 2024
DOI: https://doi.org/10.36899/JAPS.2024.1.0694
URL: https://doi.org/https://doi.org/10.36899/JAPS.2024.1.0694
Publisher: Pakistan Agricultural Scientists Forum

Abstract:
<p>The cultivation of&nbsp;<em>Hevea brasiliensis,</em>&nbsp;as the main source of natural rubber, is facing the tapping labor shortage and low dry rubber yield problems<span lang="TH">.&nbsp;</span>Management practices and tapping system could nevertheless remedy these constraints<span lang="TH">.&nbsp;</span>Accordingly, the study aimed to assess the latex and dry rubber yields of rubber trees clone RRIT 251 under different irrigation with fertilizer management methods and rubber tapping systems<span lang="TH">.&nbsp;</span>The experiment was laid out in a split<span lang="TH">-</span>plot design, 4 replications with 3 rubber trees per replication<span lang="TH">.&nbsp;</span>Two main plot treatments<span lang="TH">:&nbsp;</span>1<span lang="TH">)&nbsp;</span>application of irrigation combined with chemical and organic fertilizers treatment (IF) and; 2<span lang="TH">)</span>no<span lang="TH">-</span>irrigation<span lang="TH">-</span>fertilizer treatment (NIF). Four subplot treatments<span lang="TH">:&nbsp;</span>1<span lang="TH">) (</span>10 cm<span lang="TH">)</span>S<span lang="TH">.</span>d<span lang="TH">/</span>3<span lang="TH">+</span>ET<span lang="TH">&nbsp;&ndash;</span>&nbsp;tapping 10 cm long of trunk girth&nbsp;<span lang="TH">(</span>at 45&deg;&nbsp;angle<span lang="TH">)&nbsp;</span>above an installed bag of ethylene, for 1 day with 2 days interval; 2<span lang="TH">) (</span>1<span lang="TH">/</span>2<span lang="TH">)</span>S<span lang="TH">.</span>d<span lang="TH">/</span>2<span lang="TH">&nbsp;&ndash;</span>&nbsp;tapping half of trunk girth every other day; 3<span lang="TH">) (</span>1<span lang="TH">/</span>2<span lang="TH">)</span>S<span lang="TH">.</span>2d<span lang="TH">/</span>3, tapping half of trunk girth for 2 days with 1 day interval&nbsp;<span lang="TH">(</span>the practice of most para rubber farmers<span lang="TH">)&nbsp;</span>and; 4<span lang="TH">) (</span>1<span lang="TH">/</span>2<span lang="TH">)</span>S<span lang="TH">.</span>3d<span lang="TH">/</span>4, tapping half of trunk girth for 3 days with 1 day interval<span lang="TH">.&nbsp;</span>The controlled treatment was a combination treatment of NIFx<span lang="TH">&nbsp;(</span>1<span lang="TH">/</span>2<span lang="TH">)</span>S<span lang="TH">.</span>2d<span lang="TH">/</span>3<span lang="TH">.&nbsp;</span>The results showed that both IFx<span lang="TH">&nbsp;(</span>10 cm<span lang="TH">)</span>S<span lang="TH">.</span>d<span lang="TH">/</span>3<span lang="TH">+</span>ET and IFx<span lang="TH">&nbsp;(</span>10 cm<span lang="TH">)</span>S<span lang="TH">.</span>d<span lang="TH">/</span>3<span lang="TH">+</span>ET combination treatments had significant effects<span lang="TH">&nbsp;(</span>P<em><span lang="TH">&le;</span></em>0<span lang="TH">.</span>01<span lang="TH">)&nbsp;</span>in enhancing latex weight per tree, dry rubber weight per tree, latex yield, and dry rubber yield higher than the controlled treatment<span lang="TH">.&nbsp;</span>IF treatment had a significant effect<span lang="TH">&nbsp;(</span>P<span lang="TH">&le;</span>0<span lang="TH">.</span>01<span lang="TH">)&nbsp;</span>in enhancing latex weight per tree, dry rubber weight per tree, latex yield, and dry rubber yields higher than NIF treatment<span lang="TH">.&nbsp;</span>Rubber tapping system under&nbsp;<span lang="TH">(</span>1<span lang="TH">/</span>2<span lang="TH">)</span>S<span lang="TH">.</span>3d<span lang="TH">/</span>4 had a significant effect&nbsp;<span lang="TH">(</span>P<em><span lang="TH">&le;</span></em>0<span lang="TH">.</span>01<span lang="TH">)&nbsp;</span>in enhancing latex weight per tree, dry rubber weight per tree, latex yield, and dry rubber yield while it was significantly&nbsp;<span lang="TH">(</span>P<em><span lang="TH">&le;</span></em>0<span lang="TH">.</span>01<span lang="TH">)&nbsp;</span>low under&nbsp;<span lang="TH">(</span>1<span lang="TH">/</span>2<span lang="TH">)</span>S<span lang="TH">.</span>d<span lang="TH">/</span>2 as compared with the practice used of most farmers<span lang="TH">&mdash;(</span>1<span lang="TH">/</span>2<span lang="TH">)</span>S<span lang="TH">.</span>2d<span lang="TH">/</span>3<span lang="TH">.&nbsp;</span>It is concluded that the application of ethylene under IFx<span lang="TH">&nbsp;(</span>10 cm<span lang="TH">)</span>S<span lang="TH">.</span>d<span lang="TH">/</span>3<span lang="TH">+</span>ET management is a better innovation and technology attributable to having 45<span lang="TH">%&nbsp;</span>less time and less bark area consumed for tapping but with increased dry rubber yield, while IFx<span lang="TH">&nbsp;(</span>1<span lang="TH">/</span>2<span lang="TH">)</span>S<span lang="TH">.</span>2d<span lang="TH">/</span>3 spent more time to increase the dry rubber yield, as compared with the controlled treatment<span lang="TH">.</span></p>

Keywords: Ethylene, Fertilizer, Irrigation, Latex, Rubber