Effect of stimulants on rubber content of natural rubber latex
Pirote Klinpitak, D. of Sci., F. of Sci. and Tech., PSU.
Somporn Chuntaradet, D. of Sci., F. of Sci. and Tech., PSU.
Umpon Luksameevanich, D. of Sci., F. of Sci. and Tech., PSU.
Orasa Patarapaiboolchai, D. of Rubber Tech. and Polymer Sci., F. of Sci. and Tech., PSU.
Corresponding e-mail : porasa@bunga.pn.psu.ac.th
Grant : Government Budget
Published : Researt Report
Key words : natural rubber, stimulant, tapping
The effect of 3 natural rubber latex stimulants [2-chloroethylphosphonic acid (2-CEPA), 1-naphthylacetic acid (NAA), 2,4-dichlorophosphonic acid (2,4-D)] on latex weight, dry rubber
content and total rubber content was studied. The experiment was conducted with the 15 years old
clone RRIM 600 Hevea trees. Tapping was done every 3 days, and the total number of Tapping was 12 within the 34 days' period. The results showed that the average latex weight and the total rubber content were increased for all 3 stimulants used. The average dry rubber content was rather constant but it was lower than the control. 2-CEPA was found to increase the average weight of total rubber content from 18.22 to miximally 37.78 g/tree/tapping, while 2,4-D and NAA were responsible for
the increase of the average weight of total rubber content from 18.77 to 31.73 g/tree/tapping and
from 18.65 to 25.43 g/tree/tapping, respectively.
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