R. K. Luna , Vijay Kumar , Suresh Kumar , Ravi Kumar

Abstract

The ischolar_maining behaviour is important for selecting clones for multiplication, as hard-toischolar_main clones are likely to increase the cost of production of propagules substantially. In this experiment, ischolar_maining ability of nodal shoot cuttings of 20 clones of Dalbergia sissoo Roxb. were studied under intermittent mist conditions. Out of twenty clones, clone No. 33 (Tulsipur, Gonda), 24 (C.B. Ganj, Bareilley), 10 (Pathri, Haridwar), 237 (Banketwa, Gonda), and 9 (Chiryapur, Bijnor) produced the maximum shoot diameter, dry weight of ischolar_main and shoot, number of ischolar_mains and average ischolar_main length of resultant plants. Propagules of these clones could be produced of plantable size in less than 121 days.

Keywords

Rooting Response, Shoot Cuttings, Variation, Dalbergia sissoo Roxb., Clones

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R. Banyal , N. A. Masoodi , S. A. Gangoo , Ravi Kumar , S. N. Zaffar , Safiq Trambu

Abstract

Conifers occupy 6.0 per cent of total forest area of India and 0.4 per cent of the world. Mainly four genera i.e. Abies, Cedrus, Picea and Pinus form the forest of great economic significance in Western Himalayas especially in Kashmir province. In J. & K. 19.95 per cent forest cover is having dense and open forests to the tune of 11,019 and 9,422 km² respectively. Forest productivity has been lowered down from 3.0 to 0.5 m³ha/annum in the recent past. The improvement strategies include protection, reduction in dependency, policy and institutional frame work, increasing the forest productivity and expansion in the forest area. Strengthening silvicultural research on innovative and modern techniques, producing quality seedlings, reducing gestation period, understanding ecto-mycorrhizal association to enhance ischolar_maining, adoption of clonal forestry and adoption of people participatory mode.

Keywords

Conifers, Western Himalaya, Abies, Cedrus, Pinus, Picea

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Satish Kumar , Ravi Kumar , Neeraj Kumar , Rajendra Singh

Abstract

A study was conducted to estimate the biomass production and nutrient removal by eight years old poplar plantation raised at different spacing in a replicated randomized block design having three spacing of 5 × 4 m, 10 × 2.5 m and 15 × 2.5 m. Biomass of all the plant parts decreased with increasing tree spacing except that the differences between 10 × 2.5 m and 15 × 2.5 m spacing in respect of leaves and branches biomass were not significant. The total tree biomass including litter fall was higher in 5 × 4 m (415 t/ha) followed by 10 × 2.5 m (330 t/ha) and 15 × 2.5 m (192 t/ha) spacing. Concentration of both primary and secondary nutrients in different plant parts differed significantly at different spacing. Maximum nutrient concentration was recorded in leaves at 15 × 2.5 m spacing. However, poplar stem accounted for maximum uptake of all the nutrients. Among poplar spacing, closer tree spacing of 5 × 4 m recorded maximum uptake of both primary and secondary nutrients except that K and Mg uptake was maximum at 10 × 2.5 m spacing.

Keywords

Biomass Production, Populus deltoides, Nutrient Removal, Family Saliaceae

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