Informatics Publishing Limited

Vidya Rattan , Ombir Singh

Abstract

The floristic diversity of woody perennials was studied in Katola range of Mandi forest division in Himachal Pradesh. A total of 17 floral families contribute to the 27 species with 62.96% and 37.04% for tree and shrub species respectively. The dominant and co-dominant tree and shrub species was Pinus roxburghii, Quercus leucotrichophora and Berberies aristata, Prinsepia utilis, respectively. Distribution pattern of various tree species was contiguous except Cedrus deodara, P. roxburghii and Myrica esculenta which were random while distribution pattern of shrub species was contiguous except B. aristata. Such site-specific database is imperative as it can potentially provide fundamental information on the species organization, spatial heterogeneity, biotic and abiotic impacts on dynamics of regeneration and growth.

Keywords

Floristic Diversity, Trees, Shrubs, IVI, Woody Perennials, Katola Range

Full Text

     

Ombir Singh , V. R. R. Singh , Vidya Rattan

Abstract

The allelopathic study on silver fir and spruce showed that leachates of humus have inhibitory effects on seed germination and on radicle and plumule growth; however, litter leachates have no such pronounced effect. Foliage leachates of Sarcocoocca saligna, Viburnum nervosum and ferns (understorey plants) have more inhibitory effects on seed germination and radicle growth. It seems that leachates of fern and Viburnum nervosum are mainly respousible for very less germination on forest floor as reported in fir and spruce forests. There is no self intoxicity on germination and early growth in silver fir and spruce. The research concludes that humus and foliage of specific plants are responsible for regeneration failure in these conifers and not litter as supposed till date.

Keywords

Regeneration, Silver Fir (Abies pindrow), Spruce (Picea smithiana), Allelopathic Effects, Leachates

Full Text

     

Anita Tomar , Vidya Rattan

Abstract

Hippophae salicifolia D.Don is a deciduous tree species restricted to the Himalayan region. Seeds of H. salicifolia were collected from Uttarakhand State three provenances. Experiments were conducted in order to investigate different temperatures and lights response index in germination behavior of H. salicifolia seeds. The highest mean germination was obtained at 25°C. Therefore , it is recommended that ±25°C can be considered optimum temperature for its seed germination under controlled conditions. The light study revealed that maximum germination percentagewas found in red light followed by yellow light and minimum germination observed in green light. Provenance of Chamoli was the best as compared to Uttarkashi and Pithoragarh.

Keywords

Hippophae salicifolia, Temperature, Light, Germination percent

Full Text