PG Thesis
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Item Dependence on non timber forest products (NTFP) for the sustainable livelihood enhancement of tribals of western Attappady(Department of Forest Management and Utilisation, College of Forestry, Vellanikkara, 2014) Ashish Alex; Vidyasagaran, KNon-Timber Forest Products (NTFP) play a crucial role in the daily life and welfare of people all over the world. The livelihoods of the people living close to the forest and within the forests are inextricably linked to the forest ecosystem. In Kerala, out of 4000 tribal settlements, 671 settlements are forest settlements, which depended on NTFPs for meeting their various requirements. The present study was conducted in the Western part of Attappady among the three tribal groups namely; Irula, Muduga and Kurumba. The main objective of the study was to document the NTFPs collected and utilized by the tribes for their sustainable livelihood and explore the various marketing mechanisms followed in Western Attappady. A pre-tested questionnaire survey and semi structured interviews were conducted in fifty houses from each community. Secondary data were collected from the cooperative societies, SC/ST Federation and Silent Valley National Park Wildlife Warden’s Office etc. The Irula community who are basically daily wage workers settled on the lower plains of the valley had the highest literacy rate and obtained one per cent of their income from NTFP collection. The Mudugas settled on the midlands had the least literacy rate and derived 9 per cent of their income from NTFP collection. The particular vulnerable tribal group Kurumba settled in the interior areas of the forests obtained 44 per cent of their income from NTFP collection. The tribes of Western Attappady depended on 17 plant species for food, 19 for medicine, 8 for construction and firewood and 6 for religious purpose. The Irulas collected 9 commercial NTFPs, whereas Mudugas and Kurumbas collected 14 and 18 NTFPs respectively. The Irula and Muduga were mostly involved in the collection of honey, whereas Kurumbas involved in the collection of Acacia concinna. The NTFPs have contributed an annual income of Rs. 5755, Rs. 27220 and Rs. 46255 to the Irulas, Mudugas and Kurumbas households respectively.The Irulas got maximum income (Rs. 2880/annum) from honey, whereas Mudugas and Kurumbas got the highest income from Canarium strictum (Rs. 4800/annum) and Solanum torvum (Rs 5880/annum) respectively. Honey was collected only by men and roots were collected by women. In Irula, both the genders made equal contribution to their income from NTFP, whereas in Mudugas the men and women contributed 65 and 35 per cent respectively. The Kurumba women contributed 56 per cent of their income from NTFP collection. The most of the medicinal plants whose roots were the exploitable part were harvested during November to February. The Irulas made 30 trips/ year for NTFP collection, whereas Mudugas and Irulas undertook 78 and 123 trips/year respectively. The three institutions involved in the marketing of NTFPs were Kurumba Cooperative society, Eco shop of EDC and private traders. The Kurumba was marketing most of the NTFPs through the Kurumba society, whereas Irula and Muduga marketed NTFPs through the private shops. The private traders gave better price to the collectors than the society. For Irulas and Mudugas NTFP collection was a subsidiary source of income, whereas for Kurumbas, it was the major source of income. The private traders maintained a constant link with the tribes and ensured the private marketing channels are always active.Item Effect of pre treatement on seed germination and shade on seedling growth and yiels of mucuna pruriens (L) DC(Department of Forest Management and Utilisation, College of Forestry, Vellanikkara, 2007) Ravindra, P C; Vidyasagaran, KThe present study entitled “Effect of pre-treatment on seed germination and shade on seedling growth and yield of Mucuna pruriens (l.) DC.” was carried out in College of Forestry, Kerala Agricultural University, Vellanikkara, Trichur during the period of 2005-2007. In the first phase, graded and selected seeds were subjected to 10 different pre-treatment methods and sown in two conditions viz, polybag and nursery bed. In both the cases scarification on dorsal surface gave highest germination per cent and germination energy. Various biometric parameters like height, collar diameter and number of leaves in various treatments under polybag and nursery bed conditions were observed. Biomass produced at nursery stage was also estimated; it is evident from the study that seedlings produced from scarification treatments was most superior for all traits in both polybag and nursery bed. In the second phase, to evaluate yield under different shade situations, selected seedlings were planted out in 25 per cent, 50 per cent, 75 per cent and open situations. Various reproductive characters, yield parameters, and nutrient status were studied, in which early flowering, more number of flower bud production, and higher pod formation was observed in full light situation. The Highest seed yield and biomass production was observed when grown under open condition followed by 25 per cent and least was in 75 per cent or highest shade condition. The nutrient accumulation under different shade was estimated. Nitrogen concentration in leaf and twig was more in case of full shade followed by seedlings grown in 50 per cent shade, whereas for roots concentration of nitrogen under 75 per cent and 50 per cent shade was observed to be non-significant. In case of leaf phosphorus content, highest concentration was seen in seedlings grown under 25 per cent shade followed by seedlings in open condition. Phosphorus content in twigs was highest in 25 per cent and least in 50 per cent. In root, maximum concentration of phosphorous was observed in open condition. Highest potassium content was in 75 per cent shade followed by 50 per cent, and there was no variation in leaf potassium content in plants grown under open condition and 25 per cent shade level. Root potassium content under 50 per cent and 75 per cent was similar and higher than other two treatments.Item Biomass production and nutrient accumulation in an age series of caesalpinia sappan Linn. plantations(Department of Forest Management and Utilisation, College of Forestry, Vellanikkara, 2006) Imrose Elias Navas, E; Vidyasagaran, KThe present study was conducted at College of Forestry, Kerala Agricultural University, Vellanikkara on biomass production and nutrient accumulation in an age series (5, 6 and 7) of Caesalpinia sappan plantations in three districts of Kerala. The study reveals that diameter, height, biomass, productivity and volume increased with increasing age. The above ground biomass and biomass components also increased with increasing ages. The above ground biomass produced was 23.81 t ha-1 at 5 year, 37.80 t ha-1 at 6 year and 44.36 t ha-1 at 7 year. The productivity at age 5 year was 4.77 t ha-1yr-1, at age 6 year 6.30 t ha-1 yr-1 and at age 7 year was 6.34 t ha-1 yr-1. The increase of the productivity between 6 and 7 years were very low (0.04 t ha-1yr-1), which indicated that no further increase in the productivity of the trees. It highlights that a levelling off the productivity beyond 6 year. This consideration suggests 6 year as the optimum harvesting period of C. sappan. The percentage contribution of various components to above ground biomass was in the order: bole > branch > twig > fruit > leaves> bark. The biomass components were also showed an increasing trend. The prediction equations were prepared for above ground biomass as well as biomass components with respect to dbh and height. Even though some equations were proved more fit with combination of dbh and height, R2 value and Furnival index were relatively similar to equations with dbh alone could not be selected, it is difficult to measure height of the standing trees with definite accuracy. Hence, equations with dbh alone were selected for predicting the biomass. With respect to the dbh alone as independent variable, the total above ground biomass, the best fit equation was W = b0 +b1 D+ b2 D2. In leaves also this model proves as best fit. The components like bole, bark, branch and fruit, the best fitted equation was ln W =b0 + b1 ln D. But in twig, it was W=b0 + b1 D2. Weight table prepared for bole (UB) and total above ground biomass based on the best fit equation using diameter at breast height The nutrient concentration was increased with increasing age except in bole and branches. Concentration in bole and branches increased from 5 to 6 year and decreased from 6 to 7 year. Leaves had the maximum concentration of the nutrients and bole the lowest. The nutrient accumulation of the above ground biomass as well as biomass components increased with the increasing age of plantation. The maximum nutrients accumulated in bole and minimum in bark. Among the nutrients, N accumulated maximum followed by K and P. Nutrient use efficiency increased with increasing ages. The maximum nutrient use efficiency observed for P followed by K and N. It was found to be maximum in bole and minimum in leaf.