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Evaluation of Half Sib Progenies of Pinus roxburghii Sargent for Oleoresin Yield


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1 Department of Forest Products, Dr Y.S. Parmar University of Horticulture and Forestry, P.O. Nauni, Solan (H.P.), India
     

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Progeny trial of Pinus roxburghii was conducted to evaluate the oleoresin yielding potential of half-sib progenies of chirpine. Trees of 60 progenies were enumerated and abstracted for diameter at breast height (d.b.h). The progenies having more than 30 cm d.b.h were selected for oleoresin tapping experiment. In total, 22 out of 60 progenies had minimum one tree above 30 cm d.b.h in at least two replications. Hence, these progenies were selected for stem oleoresin tapping. The maximum value of oleoresin yield was noted in Kopra-P5 (1527.5 g/season) and lowest oleoresin yield was found in Chretmansu-P4 (455.0 g/season). The highest percentage of turpentine content (25.05%) was found in Jubble Green Centre and lowest value of 18.19 per cent was obtained for Bagthan-PT- Black Base. Maximum percentage of rosin was observed in (80.06%) Bagthan-PT Black Base. The highest value of (80.25°C) melting point of rosin was noted in Kaldoo P10 and lowest melting point (68.25°C) was observed for Jubble Green Centre.

Keywords

Pinus roxburghii, Progeny, Oleoresin Yield, Turpentine, Rosin.
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About The Authors

Kulwant Rai Sharma
Department of Forest Products, Dr Y.S. Parmar University of Horticulture and Forestry, P.O. Nauni, Solan (H.P.)
India

Ravi Sikarwar
Department of Forest Products, Dr Y.S. Parmar University of Horticulture and Forestry, P.O. Nauni, Solan (H.P.)
India

Chander Lekha
Department of Forest Products, Dr Y.S. Parmar University of Horticulture and Forestry, P.O. Nauni, Solan (H.P.)
India

Bhupender Dutt
Department of Forest Products, Dr Y.S. Parmar University of Horticulture and Forestry, P.O. Nauni, Solan (H.P.)
India


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  • Evaluation of Half Sib Progenies of Pinus roxburghii Sargent for Oleoresin Yield

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Authors

Kulwant Rai Sharma
Department of Forest Products, Dr Y.S. Parmar University of Horticulture and Forestry, P.O. Nauni, Solan (H.P.), India
Ravi Sikarwar
Department of Forest Products, Dr Y.S. Parmar University of Horticulture and Forestry, P.O. Nauni, Solan (H.P.), India
Chander Lekha
Department of Forest Products, Dr Y.S. Parmar University of Horticulture and Forestry, P.O. Nauni, Solan (H.P.), India
Bhupender Dutt
Department of Forest Products, Dr Y.S. Parmar University of Horticulture and Forestry, P.O. Nauni, Solan (H.P.), India

Abstract


Progeny trial of Pinus roxburghii was conducted to evaluate the oleoresin yielding potential of half-sib progenies of chirpine. Trees of 60 progenies were enumerated and abstracted for diameter at breast height (d.b.h). The progenies having more than 30 cm d.b.h were selected for oleoresin tapping experiment. In total, 22 out of 60 progenies had minimum one tree above 30 cm d.b.h in at least two replications. Hence, these progenies were selected for stem oleoresin tapping. The maximum value of oleoresin yield was noted in Kopra-P5 (1527.5 g/season) and lowest oleoresin yield was found in Chretmansu-P4 (455.0 g/season). The highest percentage of turpentine content (25.05%) was found in Jubble Green Centre and lowest value of 18.19 per cent was obtained for Bagthan-PT- Black Base. Maximum percentage of rosin was observed in (80.06%) Bagthan-PT Black Base. The highest value of (80.25°C) melting point of rosin was noted in Kaldoo P10 and lowest melting point (68.25°C) was observed for Jubble Green Centre.

Keywords


Pinus roxburghii, Progeny, Oleoresin Yield, Turpentine, Rosin.