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Yield response of continuous low frequency controlled upward tapping (LFCUT) with yield stimulation in rubber clone of RRII 118

By: Contributor(s): Material type: TextTextPublication details: PLACROSYM XXIII. Climate Resilient Technologies for Sustainability of Plantation Crops, 6-8 March 2019, Central Coffee Research Institute, Chikkamangaluru, Karnataka, India, Abstracts, p.47.Subject(s): Online resources: Summary: The present study was taken up to compare yield response of continuous Low Frequency Controlled Upward Tapping (LFCUT) from old and senile rubber trees of clone RRII 118 at Central Experiment Station (CES) of Rubber Research Institute of India. The trial was conducted for 6 years in the virgin bark of high panel above the renewed panels. Mean dry rubber yield over six years period under S/3 d3 frequency with once in three weeks stimulation was comparable to S/4 d4, S/3 d4 and S/3 d7 frequencies of tapping. An increase in yield of 23 per cent and 52 per cent was observed in the first year of high panel tapping under S/3 d4 with once in six week stimulation and S/3 d7 with once in three weeks stimulation over S/4 d3 with once in six weeks stimulation. However, considering the overall mean for 6 years, yield increase of 26 per cent could be obtained under S/3 d7 with once in three weeks stimulation than S/4 d3 with once in six week stimulation. By adopting d4 and d7 frequencies of tapping, requirement of tapper can be reduced by 25 percent and 51 per cent respectively, compared to third daily tapping (d3), with the additional benefits of long term sustainable yield and longer economic life at reduced cost. Practice of continuous Controlled Upward Tapping (CUT), is ideal for assured sustainable rubber production even from trees having unsuitable renewed basal panel, due to high incidence of tapping panel dryness (TPD)
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The present study was taken up to compare yield response of continuous Low Frequency Controlled Upward Tapping (LFCUT) from old and senile rubber trees of clone RRII 118 at Central Experiment Station (CES) of Rubber Research Institute of India. The trial was conducted for 6 years in the virgin bark of high panel above the renewed panels. Mean dry rubber yield over six years period under S/3 d3 frequency with once in three weeks stimulation was comparable to S/4 d4, S/3 d4 and S/3 d7 frequencies of tapping. An increase in yield of 23 per cent and 52 per cent was observed in the first year of high panel tapping under S/3 d4 with once in six week stimulation and S/3 d7 with once in three weeks stimulation over S/4 d3 with once in six weeks stimulation. However, considering the overall mean for 6 years, yield increase of 26 per cent could be obtained under S/3 d7 with once in three weeks stimulation than S/4 d3 with once in six week stimulation. By adopting d4 and d7 frequencies of tapping, requirement of tapper can be reduced by 25 percent and 51 per cent respectively, compared to third daily tapping (d3), with the additional benefits of long term sustainable yield and longer economic life at reduced cost. Practice of continuous Controlled Upward Tapping (CUT), is ideal for assured sustainable rubber production even from trees having unsuitable renewed basal panel, due to high incidence of tapping panel dryness (TPD)

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