Browsing by Subject "Carbon stock"
Now showing 1 - 4 of 4
Results Per Page
Sort Options
Item An Assessment of Soil Fertility Status and Carbon Stock Estimation of Hasantar Community Forest and its Adjoining Areas.(Department of Environmental Science, 2007) Thapa, ShyamPeri-urban agiculture is the socio-economically and ecologically justified function for the food security, development and self sustainability of the urban society. Soil organic matter plays a vital role in the maintenance of soil fertility. It is concerned with the inherent capacity of the soil to provide nutrients for the growth of specified plants. pH, soil organic carbon and other macronutrients especially NPK has a major implications in soil health and exhibit considerable variability spatially both horizontally and vertically in the soil profiles based on land use, management microclimates and others. Community forestry has been a successful policy initiative in controlling land degradation. It is the best strategy of the government that involves local people in forest management. The present study was confined to the Hasantar Community Forest and its adjoining areas. The general objective of the study was to assess the fertility status in terms of organic matter or soil organic carbon (SOC), pH and NPK, next is the estimation of SOC pool and carbon in tree biomass (dry matter). The household survey was carried out in the month of November-December in order to supplement the study with ground reality. The study showed that almost all sites were moderately acidic. The upland agriculture soil though had medium nitrogen fertility, was low to just medium in exchangeable potassium and low in available phosphorus. Similarly, forest soil was medium to high in N-fertility, almost low or low to medium in potassium fertility and insufficiently low in phosphorus nutrient. In most of the sites, the pH, SOC and NPK were found decreasing with depth but certain perturbations caused to bring variations in it. The total carbon stock of HCF (including SOC-pool and tree biomass carbon) was substantial even in a small forest area of 64 ha which was estimated to be 7562.85 t C. The study also showed that the carbon stored in the forest soil was 4-times more than that in tree biomass (dry matter). It also suggests that more carbon could be sequestered and stored in cultivated soil, forest soil and above ground tree biomass with efficient management.Item Impact of Biogas Plant on Forest Community and Carbon Stock in Western Nepal(Amrit Campus, 2024-01-28) Pandey, ShantiIn Nepal, the rural residential sector is highly dependent on firewood energy, which is the major cause of deforestation. Biogas is one of those and has become an important alternative energy source that reduces rural dependence on fuel-wood consumption and helps in forest conservation. These forests play an important role in reducing global warming and climate change by conserving atmospheric carbon dioxide (CO2). Therefore, this study aimed to assess the impact of the biogas plant on fuel consumption in the Kaligandaki rural municipality, Gulmi district, Nepal. Two different community forests users’ groups (CFUGs) were selected for the study namely, Harsa Community Forest (HCF) users’ and Sarsa Community Forest (SCF) users’ group. To assess the Important Value Index (IVI), species diversity, regeneration, and carbon stock, in total 40 sample plots (20 plots in each forest) of 10m radius were sampled using systematic random sampling method. Within the 10m radius plots, 2 subplots of 5m radius were laid for shrubs and 3 subplots of 2m radius for herbs. Tree biomass was estimated using an allometric equation, and regeneration was estimated by calculating the density of each species in seedling, sapling, and tree phases. To know about biogas plant, data were collected from field observation and personal interview. Of 40 households, 20 were selected for each forest user group in the Kaligandaki rural municipality. The carbon stock of HCF was found to be slightly higher (38.46 t/ha) than in SCF (34.46 t/ha) and increased with increasing use of a larger number of biogas plant users’ group. Similarly, total species diversity was found to be higher in HCF, but the diversity of herbs species was higher in SCF. HCF had a very good regeneration status with 12715 seedlings/ha, 6025 saplings/ha and 1230 trees/ha compared to SCF. The open canopy of HCF might have favoured the regeneration of a larger number of seedlings and saplings. This result revealed that the ground vegetation and regeneration was high in the less dense canopy forest and the installation of biogas plants helped in forest conservation.Item Tree Regeneration, Diversity and Carbon Stock in Two Community Managed Forests of Tanahun District, Nepal(Department of Botany, 2015) Gairhe, PrakashStudied community forests lie in low elevation (500m to 620 m) of western Hill in Tanahun district of Nepal. Taldanda Community forest (TF) of Dulegauda VDC is regenerating forest and being managed by communities since twenty years, while Fulbari Community forest (FF) of Chang VDC is older and growing. Carbon stock of tree species of both forest were determined by allometric regression model and species diversity by Simpsons and Shannon –weaver index. Fulbari CF found to have lower value of tree carbon stock (71.11 per ha) as well as tree diversity (H1=0.9978) than the carbon stock (109.82 ton per ha) and diversity (H1=1.1835) of Taldanda CF. Statistical analysis through T- test did not show significant difference for mean values of their carbon stock and density but significant different in mean value of diversity, DBH and basal area of two forest types. ANOVA- Test showed significant difference between the mean values of carbon stock and diversity among the strata of Fulbari CF (log carbon, P=0.00 and log H1, p=0.001) while test did not show significant difference in mean values carbon stock (p=0.001) but significant difference in diversity (p=0.0045) among the strata of Taldanda CF. There was no significant difference in other stand attributes like density, basal area and DBH among the strata of both forest types. Two way ANOVA showed Proximity of strata from road or settlement had significant effect on carbon stock among the strata in Fulbari CF (p=0.003) but there was no significant effect of recent disturbance (p=0.882 in Fulbari CF and p=0.181 in Taldanda CF) and combined effect of both proximity and disturbance (p=0.226 in Taldanda CF and p=0.138 in Fulbari CF) on tree carbon stock in both forest types. Shorea robusta was found the single dominant species in Fulbari CF (higher value of Simpsons index and basal area) and contribute about 64% of carbon stock while in Taldanda CF Shorea contribute 44% of carbon stock . Shorea along with Schima also have comparable dominancy in Taldanda CF.There was Significant positive correlation and relationship of carbon stock with diversity (R 14 2 =0.371, p=0.0023) in Fulbari CF, while density showed significant positive relationship with carbon stock and tree diversity of Taldanda CF.Item Tree Species Richness,Carbon Stock and Regeneration Status of Maltol Community Forest and Dhanushdham Protected Forest in Dhanusha, Nepal(Department of Botany, 2020) Sunar, SajinaTree species are the dominant component of forest ecosystems which influence most structural and functional attributes of these ecosystems. This study aims to assess and compare tree diversity and carbon stocks in two different management regimes namely Maltol Community forest (MCF) and Dhanushadham Protected forest (DPF). The studied MCF and DPF lied in tropical region at an altitude 80 to 230 masl in Dhanusha District of Nepal. Altogether 120 plot of 25 × 25 m2 each was established by following the stratified random sampling technique for assessing tree diversity and carbon stock in both forests. Species enrooted and encountered inside the plot were recorded. All tree species (≥6cm DBH) were tagged and their both DBH and height were measured. The allometric equation biomass-diameter regression (Model II) developed by Chave et al., (2005) was used for estimation of carbon stock of tree species and tree species diversity by Simpsons and Shannon-Wiener indices. Descriptive statistics with Pearson correlation and one way ANOVA from SPSS- Software and Microsoft Excel were used to perform the statistical analysis. The carbon stock value was found to be 1.2305t/ha in MCF and 5.592t/ha in DPF. Community forest found to have lower value of tree carbon stock than the carbon stock of protected forest. But in case of tree diversity it was recorded high in MCF (34) than in DPF (29). Shorea robusta was found to be the single dominant species in both DPF and MCF with higher basal area (26.802m²/ha and 6.65m²/ha) and contributed 87.93% and 61.99% of the carbon stock respectively. The contribution of carbon stock of two co-dominant tree species in MCF are 8.98% of Terminalia chebula and 5.18% Lannea coromandelica. Lower value of basal area in both forest types in the present study suggests that both the forests are in an immature developmental phase. The size class distribution diagram of all trees showed reverse J shaped pattern indicating a good regenerating capability of the forest. But the regeneration of Shorea robusta of both forests in the present study followed the trend as trees density/ha > saplings density/ha > seedlins density/ha indicated the poor regeneration of Shorea robusta. There was significant (P<0.05) difference between the carbon stock in both forest types.