Comparative assessment of profile storage of soil organic carbon and total nitrogen in forest and grassland in Jajarkot, Nepal

Understanding distribution of soil organic carbon and nitrogen in soil profile is important for assessing soil fertility and soil carbon dynamics. However, little is known about their distribution in soil depth below 30cm in Nepal. In this context, this research was carried out in 2019 to determine the Soil Organic Carbon (SOC) and Total Nitrogen (TN) in 0-10 cm, 11-30 cm and 31-60 cm depths of soil profile at forest and grassland in Kotila community forest, Jajarkot, Nepal. Overall field measurement was based on national standard protocols. Three replicates of soil pit from forest and grassland were dug for soil sample collection. Approximately 100 g soil sample from each soil layer was collected and taken to laboratory for SOC analysis. Separate soil samples, one sample from each soil layer were collected with the help of a metal soil corer having volume 245.22cm3 to quantify bulk density. Forest has 25.42 ton/ha SOC stock and 3.28 ton/ha TN stock up to 60 cm soil depth. Likewise, Grassland has 21.19 ton/ha SOC stock and 3.14 ton/ha TN stock up to 60cm soil depth. However, these values are not significantly different at 5 % level of significance. The SOC and TN were decreased with increased soil depths, though not significantly different at 5 % level of significance. The C:N ratio was found higher in forest than grassland. It is concluded that SOC and TN do not vary significantly between forest and grassland. Topsoil contains more SOC, TN, and C:N ratio, so the management practices should focus on maintaining inputs of soil organic matter in the forest and grassland

Carbon sequestration and soil properties in forests of Nepal

Forest soils are important for nutrient cycling and development of forest vegetation. The important of forests of Nepal in carbon storage is globally recognized. In this context, this study reports the findings of systematic analysis of the published journal articles in past 50 years of Nepal on forest soils of Nepal. It is found that restoration of the degraded forest land is important for maintain forest soil properties and carbon storage. Socioeconomic factors such as population reduction, promoting off-farm employment and economic incentives are important to reverse forest land degradation

Organic Carbon in Soil and Biomass of an Alnus nepalensis Forest in Kathmandu, Nepal

Abstract This article reports the results of measuring organic carbon contents in biomass and soil of an Alnus nepalensis forest in Kath mandu. The aboveground and belowground biomass of A. nepalensis were 62.21 t/ha and 12.44 t/ha respectively in the forest. The aboveground and belowground carbon stock in the forest were 29.24 t/ha and 5.85 t/ha respectively. Average organic carbon stock in soil depths 0-10 cm and 10-20 c m were found 19.78 t/ha and 10.61 t/ha respectively. The mean o rganic soil carbon stock in 0-20 cm soil depth was found 15.20 t/ha and in liv ing bio mass was found 35.09 t/ha. The organic carbon stock in 0-10cm soil depth was found 1.86 times more than in soil depth of 10-20 cm. Carbon stored in living vegetation biomass is 2.31 times more than soil organic carbon in the forest upto 20cm soil depth. Soil bulk density in 0-10 cm and 10-20cm soil depths were found 0.69 g/cm 3 and 1.14 g/cm 3 respectively

Assessment of Soil Organic Carbon in Tropical Agroforests in the Churiya Range of Makawanpur, Nepal

This paper reports the findings of a research study conducted in three tropical agroforestry systems in the Makawanpur district of Nepal, to quantify the spatial and vertical distribution of soil organic carbon in 30 cm soil profile depth in agrisilviculture, home garden, and silvopasture. The three agroforestry systems represent tropical agroforests of Nepal. It was found that the soil had 24.91 t/ha soil organic carbon in 30 cm soil profile in 2018, with 2.1% soil organic matter concentration in average. Bulk density was found increasing with an increase in soil depth. The soil organic carbon was not found significantly different across different agroforestry systems. Looking into the values of stocks of soil organic carbon, it is concluded that the tropical agroforests have played a role in global climate change mitigation by storing considerable amounts of soil organic carbon and the storage capacity can further be increased. Involvement of farmers in the management of tropical agroforests cannot be ignored in the process of climate change mitigation

Demand, End-Uses, and Conservation of Alpine Medicinal Plant Neopicrorhiza scrophulariiflora (Pennell) D. Y. Hong in Central Himalaya

Neopicrorhiza scrophulariiflora (Pennell) D. Y. Hong of Scrophulariaceae family (hereinafter referred to as Neopicrorhiza) has medicinally important rhizomes with high levels of trade. What factors drive demand for Neopicrorhiza in Central Himalaya is unknown. In this context, a nationwide comprehensive survey was conducted from September 2016 to March 2017 to assess demand, end-uses, and conservation of dry Neopicrorhiza rhizomes in Nepal. A total of 2313 herbal products were surveyed for Neopicrorhiza as an ingredient in 38 retailer shops. Processing industries of Neopicrorhiza in Nepal were interviewed using structured questionnaire. There were 23 herbal industries manufacturing 45 types of ayurvedic medicines as end-products containing Neopicrorhiza. The volume and value of annual demand for dry rhizomes of Neopicrorhiza in Nepal were found as 6076 kg and NRs 8573236 (USD 83235.30), respectively, in 2015/016 with average 264.17 kg/industry and NRs 1410.87 (USD 13.69) per kg. The major uses of ayurvedic medicines containing Neopicrorhiza were to treat a number of disease categories: cardiovascular system/liver (17), cardiovascular system/blood (6), nervous system (6), dermatological system (4), musculoskeletal system (3), digestive system (2), respiratory system (2), genitourinal system (4), and others (1). Despite changing legal regulation, trade and consumption of Neopicrorhiza exist in Nepal. It can be concluded that domestic consumption is not the major cause of resource depletion of Neopicrorhiza in Nepal

Why do patients choose to consume Ayurvedic Medicines in Nepal? An exploratory study

Ayurvedic medicines are believed to bring harmony and balance in mind, body, spiritual well-being and social welfare of human. The reasons for preference for these medicines are of great interest for exploration. This study was carried out in Nepal in 2017 to explore the reasons for choosing to consume Ayurvedic medicines, with support of a separate survey focusing on these medicines containing Neopicrorhiza scrophulariiflora. An online survey (n=58) and face to face interviews (n=406) were administered using structured questionnaires to explore those reasons for choice. Neopicrorhiza scrophulariiflora (Pennell) D. Y. Hong (Scrophulariaceae) is a perennial alpine herb found in the subalpine as well as alpine zone of the eastern Himalayas comprising Sikkim, Nepal, Bhutan and China. Its rhizomes are medicinally important and in trade. Fewer or no side effects, preference to natural way of healing, belief regarding healing of disease, ease of access (availability and cost), and advertisement and recommendation from others were the major reasons that the patients chose to consume Ayurvedic medicines for own's healing. In case of Ayurvedic medicines containing Neopicrorhiza scrophulariiflora, majority of the patients believed that these medicines have fewer or no side effects, can cure illness particularly for long run of chronic diseases, were cheaper than allopathic medicines, were easily available to purchase and were recommended by family members. Healing was not successful in past from allopathic and other types of medicines of majority of the patients who preferred to consume Ayurvedic medicines containing Neopicrorhiza scrophulariiflora. Further scientific studies and interventions are recommended for concerned health authorities and nursing practitioners of Nepal to test and validate the safety and effectiveness of the consumption of Ayurvedic medicines. &nbsp

Consumers Caring Health with End Products (Ayurvedic Medicines) Containing Neopicrorhiza scrophulariiflora in Nepal

Neopicrorhiza scrophulariiflora (Pennell) D. Y. Hong is an endangered herbaceous medicinal plant found in subalpine and alpine zone of eastern Himalayas comprising Sikkim, Nepal, Bhutan and China. Rhizomes of Neopicrorhiza scrophulariiflora (hereinafter referred to as Neopicrorhiza) have medicinal properties and are highly traded in Nepal, India and China. Information on driving factors for demand of Neopicrorhiza from consumer perspective is unknown, knowledge of which is important because it can allow insights into future demand and sustainability of future trade. In this context, a survey was conducted among purchasers and consumers (patients) of end products (Ayurvedic medicines) containing Neopicrorhiza (n=513) in five different cities of Nepal from March to July 2017 using structured questionnaire to explore characteristics of consumers and consumption of end products of Neopicrorhiza. The utilization of Ayurvedic medicines containing Neopicrorhiza for treatment of health disorders of human is prevalent in Nepal. Men and women patients of diverse ages and with different socio-economic profiles were found to consume Ayurvedic medicines containing Neopicrorhiza to treat health disorders associated with different organ systems of body. The patients receiving Ayurvedic medicines containing Neopicrorhiza were children, adults and elders ranging from 1 to 98 years old (av. 37.6 years). Employed and unemployed, educated and illiterate consumers were found to consume Ayurvedic medicines containing Neopicrorhiza to treat their health disorders in Nepal. Patients receiving those medicines were from households having diverse annual cash income levels. The purchase and consumption of Ayurvedic medicine containing Neopicrorhiza was most often guided by a doctor’s prescription. Most of the respondents believed that the prices of those Ayurvedic medicines were fairer than other types of medicines. Similar studies are recommended in other countries like India and China where the Neopicrorhiza is exported from Nepal