Sunil Puri , S. L. Swamy , A. K. Jaiswal

Abstract

The study describes growth, biomass and net primary productivity in different clones of Populus deltoides Bartr. Grown on vertisol type of soil at Raipur situated at 21°12'N latitude and 81°36°E longitude. Based on growth and survival performance of 106 clones in the nursery over successive two years, 19 clones were selected for field evaluation. Survival in the field in different clones ranged from 40 to 100 per cent. The best five clones in 4 yr old plantation was in order of 65/27 > S7Cl > G48 > G3 > D121. The above- ground biomass varied from 2.79 to 43.77 MT ha^-1, while that of coarse ischolar_mains it was 0.67 to 10.5 Mg ha^-1. Stem wood in different clones varied from 33.7 to 62.2 per cent of the total biomass followed by coarse ischolar_mains (16.5-28.0%), branches (7.4-23.7%), bark (7.5-12.9%) and leaves (5.3-10.3%). Net primary productivity also differed in different clones. The study concludes that some of the clones can be grown at 21°N latitude which was to date not considered a suitable region for the introduction of P. deltoides.

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A. K. Jaiswal , Govind Pal , J. P. Singh , Bharati Patel

Abstract

Status of lac production in lac growing districts of Jharkhand has been assessed with parameters like minimum, maximum, average production and simple growth rate for the period 2006-07 to 2009-10. A comparison of growth rate in three years period (2006- 07 to 2008-09) with those in four years period (2006-07 to 2009-10) has also been made for understanding the status of change in production. The analysis of data showed that Ranchi district has highest production of lac to the tune of 28.9 per cent of total lac production of the state followed by Simdega (24.5 per cent) and Gumla (17.9 per cent). The positive growth rate in lac production was recorded in Gumla, West Singhbhum and Simdega to the tune of 21.6, 6.32 and 28.9 per cent per annum respectively during last four years. Highest negative growth rate was recorded in Latehar (-69.3 per cent) district. Comparative analysis of last three and four years period growth rate showed that Gumla district recorded positive growth with slight reduction (24.9 to 21.6 per cent). Simdega district reported very good improvement (-21.2 to 28.9 per cent) and another district which recorded good improvement was West Singhbhum (- 17.3to 6.3 percent).

Keywords

Lac Production, Growth Rate, Jharkhand, 'Rangeeni ' Lac And 'kusmi' Lac

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A. K. Jaiswal , Govind Pal , J. P. Singh , Bharati Patel

Abstract

District-wise and crop-wise status of lac growing districts of Madhya Pradesh have been assessed with parameters like minimum, maximum, average production and simple growth rate (SGR) for four years (2006-07 to 2009-10). The study reported that the state contributes 16 per cent production of the country; however, the growth rate during the study period was negative and to the tune of 10.1 per cent per annum. Seoni district contributed maximum in lac production (41.6 per cent) followed by Balaghat (30.6 per cent), Hosangabad (8.4 per cent) and Mandla (7.0 per cent). Strain-wise growth rate for the whole state showed that both rangeeni and kusmi lac production attained a negative growth of 5.2 and 32.1 per cent per annum. Crop-wise growth rate for the state showed that rangeeni-summer attained positive growth (12.1 per cent per annum) while rangeeni-rainy registered negative growth(37.5per cent). Similarly,both kusmi-winter and kusmi-summer crop registered negative growth rate of 34.0 and 29.9 per cent per annum respectively.Major reduction in lac production was due to loss of rangeeni-rainy crop which caused less availability of broodlac for next season.Thus less production in one season indirectly affected production of succeeding season crops also.

Keywords

Lac production, Growth rate, Schleichera oleosa, Rangeeni and Kumi Lac

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A. K. Jaiswal ¹, J. P. Singh ²

Affiliations
1 Division of Transfer of Technology Indian Institute of Natural Resins and Gums, Ranchi 834 010
2 Division of Transfer of Technology Indian Institute of Natural Resins and Gums, Ranchi 834 010, IN

Abstract

Analysis of year wise lac production data in India during XI Plan (2007-2008 to 2011-2012) indicated average production by the country to the tune of 16.246 thousand tonnes. The Jharkhand state registered highest average annual production (6.306 thousand tonnes), sharing 38.82 per cent of total lac produced in the country. This is followed by Chhattisgarh (30.21%), Madhya Pradesh (13.66 %), West Bengal (6.97%), Maharashtra (4.96%), Odisha (2.27%), Uttar Pradesh (1.94 %), Assam (0.52%), Andhra Pradesh and Gujarat (0.30% each) and Meghalaya (0.06 %). In respect of state wise growth rate in lac production, the country registered negative growth rate to the tune of 8.38 per cent per annum. Amongst the major lac producing states, Jharkhand and West Bengal recorded positive growth of 12.19 and 9.94 per cent per annum respectively, during this period. Amongst the declining trend state, Madhya Pradesh recorded highest negative growth (-32.41 %) followed by Uttar Pradesh (-29.37%), Chhattisgarh (-26.76%), Maharashtra (-10.62%) and Odisha (-9.92%). The other minor lac producing states namely Assam, Gujarat, Meghalaya also registered declining trend during the period. Strain wise analysis of production data for various states was also carried out in an attempt to identify which type of lac suffered most during this period

Keywords

Lac Production. Growth Rate, Xi Plan Period

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