RT Journal
T1 EFFECTS OF MANAGEMENT PRACTICES AND TAPPING SYSTEM ON LATEX AND DRY RUBBER YIELDS OF RUBBER TREE CLONE RRIT 251
A1 B. Wiangsamut
A1 M. Koolpluksee
A1 C. Makornpas
A1 C. Chaichuay
A1 R. Chaichuay
A1 M.E.L. Wiangsamut
JF Journal of Animal and Plant Sciences
JO JAPS
SN 1018-7081
VO 34
IS 1
SP 50
OP 61
YR 2024
FD 2024/01/20
DO DOI https://doi.org/10.36899/JAPS.2024.1.0694
AB <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>
K1 Ethylene, Fertilizer, Irrigation, Latex, Rubber
PB Pakistan Agricultural Scientists Forum
LK https://thejaps.org.pk/AbstractView.aspx?mid=2022-JAPS-403