Refinar búsqueda
Resultados 1-8 de 8
Growth of Fagus sylvatica in young mixed stand: case study in central Latvia
2016
Purina, L., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Adamovics, Andis, Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Katrevics, J., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Katrevica, Z., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Dzerina, B., Latvian State Forest Research Inst. Silava, Salaspils (Latvia)
Climatic changes are shifting the potential tree distribution limits of many tree species northwards. One of such species is Fagus sylvatica, currently represented in Latvia only by a few stands. In order to increase knowledge on its potential use in the forest management, the aim of our study was to characterize the growth of beech in a young stand in the central part of Latvia. The stand of beech and spruce, mixed in rows with an initial spacing of 2.5 x 2.5 m in Oxalidosa forest type was assessed. Survival of European beech in clear cutting was similar to that observed for the native Norway spruce (73% and 79%, respectively), but both height and diameter were notably and significantly superior for wildlings at the mean age of 15 ± 2 years, reaching on average 7.4 ± 0.30 m and 8.9 ± 0.69 cm, respectively. Increasing ring width with increasing tree age for both tree species was observed until the last four years, when large and increasing superiority of beech over spruce, coinciding with reduction of ring width of spruce, was noted. It was most likely caused by intensified competition due to very wide crowns formed by young beech trees in the plantation with wide spacing: average crown radius reached 2.4 ± 0.16 m, for few trees exceeding even 4 m.
Mostrar más [+] Menos [-]Economic calculation of short rotation willow plantations in Latvia
2012
Makovskis, K., Latvia Univ. of Agriculture, Jelgava (Latvia);Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Lazdina, D., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Bite, L., Latvia Univ. of Agriculture, Jelgava (Latvia)
Short rotation forests (SRF) can be used for biomass production for energy applications in Latvia. Establishment of plantations could be one of possibilities how to reach targets of renewable energy resource (RES) consumption of 40% in 2020. In Latvia’s conditions, one of most suitable species that could be used for SRF is willow (Salix sp.). Abandoned agricultural lands are suitable for establishment of plantations. Productivity of 8 oven- dried tons (ODT) ha-1 year -1 can lead to Rate of Return (IRR) of 17.1% and Net Present Value (NPV) 1099 Latvian Lats (LVL) if the biomass price is 33 LVL ODT-1. Establishment, harvesting and transporting costs account for 88% of the total cost of production. Price of wood chip and fuel plays the most important role in economics of plantation.
Mostrar más [+] Menos [-]Lacquer tree-based swidden system in Southwest China
2001
Wang Kanglin (The Chinese Academy of Sciences, Heilongtan, Kunming, Yunnan 650204 (Peoples Rrepublic of China). Kunming Inst. of Botany) Long Chun-Lin
Traditional rotational farming system of the Karen people in Thailand
2001
Trakansuphakon, P. (252 Moo 2T. Sansaimoi A. Sansai, Chiang Mai 50210 (Thailand))
Sustainable swidden agroecosystems in Yunnan upland, Southwest China
2001
Wang Kanglin (The Chinese Academy of Sciences, Heilongtan, Kunming, Yunnan 650204 (Peoples Republic of China)). Kunming Inst. of Botany) Xu Jianchu | Chen Sanyang | Pei Shengji
Traditional slash and mulch systems in the Solomon Islands
2001
Maemouri, R.K. (Appropriate Technology for Community and Environment, c/o Development Services Exchange, P.O. Box 556, Honiara (Solomon Islands))
Relay cropping as an improved fallow practice in northern Thailand
2001
Prinz, K. (McKean Rehabilitation Center, P.O. Box 53 Chiang Mai 50000 (Thailand)) Ongprasert, S.
Utilization of obi [Ipomoea batatas] in the shifting agricultural methods of the Ikalahan [tribes of Nueva Vizcaya, Philippines]
2001
Rice, D. (Kalahan Educational Foundation, Inc., Imuyan, Santa Fe, Nueva Viscaya (Philippines))