Y. C. Tripathi , Ajay Thakur , T. C. Bhuyan

Abstract

India is one of the richest countries in Bamboo population covering 12.8% of the total forest land of the country. However, the yield per hectare is dismally low due to poor management, unscientific exploitation and low investment in raising preferred bamboo species. Very little attention has been paid until now to the management of natural bamboo stands and to ensure sustained supply of this raw material that result in constraining and reducing the potential benefits and value of bamboo applications. The current demand of bamboo for various purposes is estimated at 26.69 million tonnes as against the supply of 13.47 million tonnes. The average per hectare annual productivity of bamboo in India is about 1 MT/ha which is much less than the world's average. Low per hectare yield indicates poor management of existing bamboo plantations in forest and non-forest areas. It has been shown in case of some species that intensive cultural operations and scientific management of bamboo plantations can produce much higher yield. Establishment and management aspects of bamboo plantation for enhanced productivity are discussed in the paper.

Keywords

Bamboo, Economic Status, Demand-Supply, Productivity, Management

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Ajay Thakur , Papori Sharma

Abstract

A mist-less condition was created and ischolar_main growth regulator Indole-3 butyric acid, Para Hydroxy benzoic acid (IBA and PHBA) was tried for ischolar_maining of stem cuttings in Dipterocarpus retusus. Cuttings were taken from three positions i.e., apical, middle and basal of nine months old seedlings. Adventitious ischolar_maining was obtained 18 % in case of shoots derived from middle portions of seedlings, however, shoots from apical and basal positions failed to ischolar_main. Variation of ischolar_maining was non- significant in case of hormonal treatment. Sprouting occurs in shoots from all three positions and varied significantly due to its position (P<0.01) and growth regulator (P<0.05). Rooting occurred mostly at callus.

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Ajay Thakur , Papori Sharma , S. Das , B. P. Borkakoty

Abstract

No abstract

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Ajay Thakur , Papori Sharma , S. Das , A. N. Singh

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No abstract

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Ajay Thakur , Papori Sharma

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No abstract

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Ajay Thakur , Papori Sharma , Nityananda Mahanta

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No abstract

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Ajay Thakur , Praveen H. Chowhaan , V. R. S. Rawat , N. D. Khobragade , Papori Sharma

Abstract

No abstract

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Ajay Thakur , Dalbara Singh Sidhu

Abstract

Being suitable species for timber production, genetic improvement programme of Eucalyptus tereticornis was started in Punjab Agricultural University, Ludhiana by selecting superior phenotypes and raising their progeny trial. In this study, phenotypic and genetic variation of 18 months old half-sib progenies of 17 selected plus trees were assessed for the height (m) and collar diameter (cm). The maximum mean height and mean collar diameter were 2.50 m and 2.20 cm respectively in family no 16. The individual tree heritability for height and collar diameter was estimated 0.30 and 0.24 respectively, while the family heritability was 0.65 for height and 0.60 for collar diameter. The phenotypic and genetic (additive) variance among the families for the height was 0.38 and 0.11 respectively, while it was 0.64 and 0.15 for collar diameter. The phenotypic coefficient of variability was 29.10 % for height and 46.75 % for collar diameter while the genetic (additive) coefficient of variability was 15.86 % and 22.72 % for height and collar diameter respectively. The estimated genetic gain was 0.49 m and 0.50 cm for height and collar diameter respectively.

Keywords

Genetic Variation, Eucalyptus tereticornis, Half-sib Progenies, Punjab Agricultural University, Ludhiana

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M.M. Rather , Monika Panwar , Ajay Thakur , Anup Chandra

Abstract

No Absract

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J. M. S. Chauhan ¹, Prabha Bisht ¹, Monika Panwar ¹, Ajay Thakur ¹

Affiliations
1 Tissue Culture Discipline, Genetics and Tree Propagation Division, Forest Research Institute, Dehradun (Uttarakhand), IN

Abstract

The present study involves in-vitro clonal propagation of Elaeocarpus sphaericus through axillary bud sprouting and subsequent shoot regeneration. Optimal proliferations of axillary shoot were induced on MS medium supplemented with BAP (1.5 mg/l) and KN (1.5 mg/l). Optimal shoot multiplication was induced on MS medium fortified with BAP (1.5mg/l), KN (1.5 mg/l) and CH (100 mg/l). MS medium supplemented with 1.0 mg/l BAP and 50 mg/l ADS was used for routine sub-culturing of multiple shoots at periodic interval of every 3 weeks. Of the 6 treatments (3 each of IBA and NAA) imposed for ischolar_maining of shoots, 1/2 MS + 1.0 mg/l IBA induced 80% ischolar_maining. Plants were hardened in vitro and acclimatized in hardening chamber and subsequently transferred to field.

Keywords

Elaeocarpus Sphaericus, In-Vitro Propagation, Nodal Explant, Axillary Shoot Sprouting.

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Puran Chandra ¹, Ajay Thakur ¹, O. P. Chaturvedi ¹, T. S. Mehra ¹, Boneface Lepcha ¹

Affiliations
1 ICAR RC for NEH Region, Umiam (Meghalaya), IN

Abstract

No abstract.

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