Biomass, Productivity and Energetics in Himalayan Alder Plantations |
| |
Authors: | E SHARMA; RS AMBASHT |
| |
Institution: | Department of Biological Sciences, Wright State University Varanasi-221005, India |
| |
Abstract: | Biomass, net primary production and energy fixation in an agesequence of Himalayan alder (Alnus nepalensis D. Don) plantationswere estimated in the Kalimpong forest division of the easternHimalayas. Biomass in the plantations ranged from 106 t ha1(7-year stand) to 606 t ha1 (56-year stand) demonstratingthe potential of the alder for accumulating large biomass. Netprimary production and net energy fixation rates of the plantationswere reduced by nearly half in the 7-year stand (25 t ha1year1; 421 x 106 kJ ha1 year1) comparedwith the 56-year stand (13 t ha1 year1; 215 x106 kJ ha1 year1). Compartmental models of energystorage and flow rates were developed for the 7-year and 56-yearstands. The production efficiency, energy conversion efficiencyand energy efficiency in N2 fixation have inverse relationshipswith plantation age. These efficiencies, when treated with eachother, showed significant exponential functions. Alnus nepalensis D. Don, Himalayan alder, plantation age, biomass, net primary production, energy flow, efficiencies |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|