Agroforestry systems for the production of woody biomass for energy transformation purposes

2007 ◽  
Vol 29 (4) ◽  
pp. 319-328 ◽  
Author(s):  
Holger Gruenewald ◽  
Barbara K.V. Brandt ◽  
B. Uwe Schneider ◽  
Oliver Bens ◽  
Gerald Kendzia ◽  
...  
Keyword(s):  
Woody Biomass ◽  
Agroforestry Systems ◽  
Energy Transformation ◽  
Biomass For Energy

Woody biomass for energy use will face rising scrutiny

2021 ◽  
Keyword(s):  
Energy Use ◽  
Woody Biomass ◽  
Wood Industry ◽  
Financial Flows ◽  
Content Type ◽  
Forestry Practices ◽  
Renewable Energy Generation ◽  
Green Label ◽  
By Products ◽  
Biomass For Energy

Significance There is an obvious tension between promoting forests to capture carbon and burning wood for energy. Increased demand risks unsustainable indirect changes of land use. However, modern forestry practices suggest woody biomass can be used sustainably, if forest eco-systems are well managed. Impacts Although it continues to carry a green label, debate over its sustainability may damage financial flows into the biomass sector. The sector focus on secondary and tertiary wood sources, as well as wood industry by-products, will increase. Woody biomass use for heat and power will make up a key part of renewable energy generation, particularly in heavily forested countries.

Components and Nutrient Concentrations of Small-Diameter Woody Biomass for Energy

2013 ◽  
Vol 30 (3) ◽  
pp. 137-142 ◽  
Author(s):  
John M. Kabrick ◽  
John P. Dwyer ◽  
Stephen R. Shifley ◽  
Brandon S. O'Neil
Keyword(s):  
Small Diameter ◽  
Woody Biomass ◽  
Nutrient Concentrations ◽  
Biomass For Energy

scholarly journals Allometric equations for estimating on-farm fuel production of Gliricidia sepium (Gliricidia) shrubs and Cajanus cajan (pigeon pea) plants in semi-arid Tanzania

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
J. M. Hafner ◽  
J. Steinke ◽  
G. Uckert ◽  
S. Sieber ◽  
A. A. Kimaro
Keyword(s):  
Cajanus Cajan ◽  
Predictor Variable ◽  
Woody Biomass ◽  
Gliricidia Sepium ◽  
Pigeon Pea ◽  
Agroforestry Systems ◽  
Least Square ◽  
Allometric Equations ◽  
Stem Height ◽  
On Farm

Abstract Background Fuelwood is considered to be the primary source of cooking energy in Tanzania and, due to ongoing deforestation, access to fuelwood is becoming more cumbersome. On-farm agroforestry systems can reduce dependency on off-farm fuel; however, the output of on-farm produced fuel is typically uncertain as production potentials are often not known. In this paper, we have developed allometric equations to model the above-ground woody biomass (AGWB) production from intercropped Gliricidia sepium (Jacq.) Kunth ex Walp (Gliricidia) shrubs and Cajanus cajan (L.) Millsp. (pigeon pea) plants. Methods We used a destructive sampling approach, for measuring the dendrometric characteristics, such as the root collar diameter at a 20 cm stem height (RCD20) and the stem height to estimate the AGWB production. The models are based on 112 Gliricidia and 80 pigeon pea observations from annually pruned plants. Seven allometric equations were fitted to derive the best-fit models for the AGWB production. Results We found that using a natural log-transformed linear model with RCD20 as a single predictor variable provides the highest explanatory value to estimate the AGWB production (Gliricidia: R2 = 95.7%, pigeon pea: R2 = 91.4%) while meeting Ordinary Least Square (OLS) estimator requirements. Adding stem height as an additional variable to predict the AGWB production does not improve model accuracy enough to justify the extra work for including it. Conclusions While on-farm pigeon pea plants produced a stable amount of woody biomass per annum, annual fuelwood production from Gliricidia shrubs increased over the years. Compared to the annual fuelwood consumption data from the literature, our results show that on-farm produced fuelwood can substantially offset the demand for off-farm fuel, potentially resulting in household fuelwood autarky.

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