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Sucrose, photosynthetic photon flux density, & CO2 concentration affect growth & development of micropropagated mountain ash

XV World Forestry Congress, 2-6 May 2022










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    Article
    The role of bamboo forest in balancing and sustaining the development of local livelihood and human well-being in rural areas of Vietnam
    XV World Forestry Congress, 2-6 May 2022
    2022
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    The balanced maintenance between forest development, human health, and well-being is the key to sustainable forest landscape management. My research aims to find out the current status of that relationship in Muong Hinh community (North-Central Vietnam) with the focus on lung bamboo forest - the vital natural resource of local communities. Lung bamboo (Bambusa longissima sp.nov) is an endemic species of Vietnam and is considered a strategic species for development in rural areas. However, due to the over-exploitation and unplanned management, the lung bamboo forests have been remarkably degraded and are even at risk of being depleted. Muong Hinh, currently, has 712 ha of lung bamboo forests and the payment from lung bamboo harvesting is the most important income for the local dwellers. However, it does not meet the local needs due to the low price and low added value. Besides, after years of applying wrong harvesting techniques with high harvesting intensity, local people are losing their forest both in terms of the forest area and quality. There is also a lack of knowledge on sustainable bamboo forest management within the community. Based on the current situation, some recommendations are given on essential techniques for sustainably managing and using bamboo forests. Of which, the proper harvesting intensity and the rotation of exploiting areas are the most critical issues. If the local people are going to apply the suggestions, they probably earn about 440 US$/ha/year from their lung bamboo forest (three times higher than their current income), and it could be increased up to 1,200 US$/ha/year shortly. Moreover, there is also a need to have alternative incomes for stable livelihood development. Several options are developing post-harvesting activities or possessing facilities, setting up a lung bamboo value chain, and reasonable collecting of other potential forest products such as timber or NTFPs. Keywords: forestry, lung bamboo forest, forest landscape management, sustainable livelihood development. ID: 3478867
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    Micropropagation of bamboo in the green pathway to the growth and sustainability: snags and keys
    XV World Forestry Congress, 2-6 May 2022
    2022
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    The fastest growing plant in the world, bamboo is an ideal investment for ecosystem management. Potentials of the bamboo restoring the degraded lands are already established. This plant can easily colonized in disturbed land because of its adaptability and nutrient conservation ability. This plant can protect steep slopes, soils, water ways, prevents soil erosion, sequester carbon and brings many other ecosystem benefits. The impact of bamboo growth on the soil may be different at their species level and it is expected that there is a large increase in the microbial biomass, particularly, in the rhizosphere zone as they do not provide only a larger root surface area but enhances the soil fertility. Here micropropagation has a great role by producing a huge quantity of propagules with ideal characteristics for specific area. This paper was mentioned about the different constraints related to establish an efficient protocol for bamboo micropropagation and some solutions for them. Key words: Bamboo; Land restoration; micropropagation. ID: 3486685
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    Effects of drought stress and nitrogen fertilization on growth and physiological characteristics of Pinus densiflora seedlings under elevated temperature and CO2 concentrations
    XV World Forestry Congress, 2-6 May 2022
    2022
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    Pinus densiflora is the most widely distributed tree species in South Korea. Its ecological and socio-cultural attributes makes it one of the most important tree species in S. Korea. In recent times however, the distribution of P. densiflora has been affected by dieback. This phenomena has largely been attributed to climate change. This study was conducted to investigate the responses of growth and physiology of P. densiflora to drought and nitrogen fertilization according to the RCP 8.5 scenario. A Temperature Gradient Chamber (TGC) and CO2- Temperature Gradient Chamber (CTGC) were used to simulate climate change conditions. The treatments were established with temperature (control versus +3 and +5°C; aCeT) and CO2 (control: aCaT versus x1.6 and x2.2; eCeT), watering (control versus drought), fertilization (control versus fertilized). Net photosynthesis (Pn), stomatal conductance (gs), biomass and soil water content (SWC) were measured to examine physiological responses and growth. Relative SWC in aCeT significantly decreased after the onset of drought. Pn and gs in both aCeT and eCeT with fertilization were high before drought yet decreased rapidly after 13 days under drought. The fastest mortality showed in aCeT but the longest survival was observed in eCeT. Total and partial biomass (leaf, stem and root) in both aCeT and eCeT with fertilization were significantly high, but significantly low in aCeT. The results of the study are helpful in addressing P. densiflora vulnerability to climate change by highlighting physiological responses related to carbon allocation under differing simlulated environmental stressors. Keywords: Climate change ID: 3621653

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