Trunk Injection as Green Technology to Improve Rubber Latex Production of Hevea brasiliensis

doi:10.46254/ap03.20220628

Cited by 1 publication

(1 citation statement)

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“…In like manner that Nakviroj et al ( 2007) acknowledged the application of complete chemical fertilizers of N, P, and K with an additional 12.5 t ha -1 of mulniciple compost, or with about 18.75 t ha -1 of incorporated cassava stalks ( leaves and stems) , resulted in the best growth and highest cassava root yields of 30-50 t ha -1 , which is considerably higher than the yield of 20-30 t ha -1 obtained with only complete chemical fertilizers. Ginting et al (2023) has proven that younger than 20-year-old rubber trees increase of latex and dry rubber yield significantly were given nutrient solution by injection without dilution of nutrient solution, by infusion with the dilution of nutrient solution at 20 ml L -1 , and by no-application of nutrient solution. The heights of the infusion on the trunk at 50 cm from the ground with the dilution of nutrient solution at 10 ml L -1 gave the effect on the highest latex and dry rubber yield.…”

Section: Discussionmentioning

confidence: 99%

Effects of Management Practices and Tapping System on Latex and Dry Rubber Yields of Rubber Tree Clone Rrit 251

Wiangsamut,

Koolpluksee,

Makornpas

et al. 2023

THE JAPS

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The cultivation of Hevea brasiliensis, as the main source of natural rubber, is facing the tapping labor shortage and low dry rubber yield problems. Management practices and tapping system could nevertheless remedy these constraints. 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. The experiment was laid out in a split-plot design, 4 replications with 3 rubber trees per replication. Two main plot treatments: 1) application of irrigation combined with chemical and organic fertilizers treatment ( IF) and; 2) no-irrigation-fertilizer treatment ( NIF) . Four subplot treatments: 1) (10 cm)S.d/3+ET -tapping 10 cm long of trunk girth (at 45° angle) above an installed bag of ethylene, for 1 day with 2 days interval; 2) (1/2)S.d/2 -tapping half of trunk girth every other day; 3) (1/2)S.2d/3, tapping half of trunk girth for 2 days with 1 day interval (the practice of most para rubber farmers) and; 4) (1/2)S.3d/4, tapping half of trunk girth for 3 days with 1 day interval. The controlled treatment was a combination treatment of NIFx (1/2)S.2d/3. The results showed that both IFx (10 cm)S.d/3+ ET and IFx (10 cm)S.d/3+ ET combination treatments had significant effects (P≤ 0.01) in enhancing latex weight per tree, dry rubber weight per tree, latex yield, and dry rubber yield higher than the controlled treatment. IF treatment had a significant effect ( P≤ 0. 01) in enhancing latex weight per tree, dry rubber weight per tree, latex yield, and dry rubber yields higher than NIF treatment. Rubber tapping system under (1/2)S.3d/4 had a significant effect (P≤0.01) in enhancing latex weight per tree, dry rubber weight per tree, latex yield, and dry rubber yield while it was significantly (P≤0.01) low under (1/2)S.d/2 as compared with the practice used of most farmers-(1/2)S.2d/3. It is concluded that the application of ethylene under IFx (10 cm)S.d/3+ET management is a better innovation and technology attributable to having 45% less time and less bark area consumed for tapping but with increased dry rubber yield, while IFx (1/2)S.2d/3 spent more time to increase the dry rubber yield, as compared with the controlled treatment.

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Section: Discussionmentioning

confidence: 99%