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International Journal of Research on Land-use Sustainability 1: 18-25, 2014 Copyright © 2014 ISSN: 2200-5978, print
Volume 1 | Issue 1| June 2014 P a g e | 18
Research Article
Can homegardens help save forests in Bangladesh? Domestic biomass fuel consumption patterns and implications for forest
conservation in south-central Bangladesh
Sharif Ahmed Mukul1,2,*, Mashiur Rahman Tito2,3, Shifath Ahmed Munim4
1Tropical Forestry Group, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, QLD 4072, Australia
2Centre for Research on Land-use Sustainability, Maijdi, Noakhali 3800, Bangladesh 3Research and Innovation, mPower Social Enterprises Limited, Banani, Dhaka 1213, Bangladesh
4Architecture Discipline, Science, Engineering and Technology School, Khulna University, Khulna 9208, Bangladesh *Corresponding author: [email protected] / [email protected]
Received: April 1, 2014; Accepted: May 25, 2014
Communicated by: Dr. Mohammad Shaheed Hossain Chowdhury, Shinshu University, Japan
ABSTRACT
We conducted an exploratory survey in south-central Bangladesh to realize the contribution of homegardens to household domestic biomass fuel consumption. Households were placed into categories based on their land holdings. A total of thirty households were interviewed to understand their domestic fuel consumption pattern as well as the role played by homegardens in meeting their biomass fuel requirements. This study suggested that the majority of the households in the area rely extensively on homegardens to meet their domestic fuel requirements. 58% of the households biomass fuel were drawn from homegardens, followed by neighbours (16%), markets (12%) and from public/fallow land (14%). 47 species were identified from the homegardens that were used by the respondents as fuel. Fuelwood was a major type of biomass fuel used by the households, contributing to about 56% of households total biomass fuel consumption, followed by dried leaves (21%), dung cake/sticks (14%), and crop residues (6%). As homegardens were found to provide a valuable alternative source of biomass fuel, it was concluded that a rich homegarden system near forest regions should be supported in order to reduce pressure on the country’s remaining forests. Governments can facilitate this by granting marginal households access to trees in fallow lands, as well as public places including roads, railways and river banks.
Key words: biomass fuel, domestic cooking, homegarden, forest conservation, deforestation
Introduction
About 2.3 billion people worldwide – every
two in five - rely on biomass fuel as their main
sources of domestic energy requirements (FAO 1995;
Sands 2005; Arnold et al. 2006). Whilst economic
development in many developing countries has
progressed rapidly in the last few decades,
alternatives to biomass fuel are still scarce in many
areas in those countries, particularly in remote rural
areas (Soussan 1991; Koopmans 1993). Forests are
still vital sources of biomass fuel, providing the
majority of biomass fuel requirements in most
developing countries (Arnold et al. 2006). According
to FAO (2006), fuel wood harvests account for about
40% of the global removals of wood from forests.
Extraction of fuelwood from forests is also one of the
major reasons for its depletion and degradation in
developing states (Sands 2005). In South Asia,
projected biomass fuel consumption during the year
2010 was about 372.5 million cubic meters, which
was second highest in the world (Arnold et al. 2003;
Arnold and Persson 2003). This suggests that biomass
fuels will continue to be a major source of domestic
energy in rural areas in this region for many years
ahead. However, a combination of rapid losses in
forest cover and reduced access to forests due to
conservation regulations have stimulated the need
Highlights
Homegardens are the primary source of fuel in forest poor regions of Bangladesh;
Rural households prefer woodfuel from inferior tree spceis with higher calorific value;
Promoting homegardens can be a easy way to reduce anthropogenic pressure on forests.
Research Article DOI 10.13140/2.1.3049.1848
Homegardens can help save forests in Bangladesh S.A. Mukul et al.
Int. J. of Res. on Land-use Sust. 1: 18-25 | 2014 P a g e | 19
for an alternative source of biomass fuel (Uddin and
Mukul 2007).
In tropical regions homegardens comprise an
assemblage of plants around a residence, and
typically include trees, shrubs, vines and herbs (Nair
1993). In fact, homegardens represent a well-
established traditional land-use system in the tropics,
playing an important role in the livelihoods and
economy of small-holder rural households (Webb and
Kabir 2009). They also play a considerable role in
forest conservation by providing an alternative source
of biomass fuel for local people, which may have
otherwise been derived from forests (Uddin and
Mukul 2007; Bardhan et al. 2012). We assume that, in
a changing world with decreasing forest cover and/or
limited access to forests for biomass fuel,
homegardens will play an important role as a
substitute source of biomass fuel together with
sources other non-timber forest products (Mukul
2011). In areas where there are limited forests for
public use, homegardens are already playing a
noteworthy role in meeting household fuel
requirements for domestic cooking (Miah et al. 1990,
2011).
Bangladesh is characterized by a relatively small
natural resource base and a population of more than
160 million. The official forest coverage of the
country is about 17%, with per capita forestland of
around 0.02 ha – one of the lowest in the world
(Mukul et al. 2013). Moreover, the country’s public
forests are often degraded and unevenly distributed
or spatially scattered (out of 64 districts of the
country, 28 districts have no state forests)
(Zashimuddin 2004). Due to its high population
density, poverty and unemployment the
deforestation rate in the country is also one of the
highest in tropical Asia (Poffenberger 2000). Despite
this, per capita fuelwood consumption in the country
is one of the lowest in the world (i.e. 0.1 m3) as there
is a big gap between supply, availability and demand
(Miah et al. 2011).
More than 77% of people live in rural areas in
Bangladesh and about 80% of them possesses small
to medium sized homegardens which are used as a
supply for domestic fuel (Zashimuddin 2004). In the
southern and central regions of the country there are
very limited public forests where people can collect
biomass fuel for domestic use. In such circumstances
homegardens have evidently played a vital role in
meeting the demand for biomass energy (see for
example: Zashimuddin 2004; Jashimuddin et al. 2006;
Miah et al. 2009, 2011). This paper reports a case-
study carried out in a south-central rural village of
Bangladesh where we investigated households’
domestic biomass fuel consumption patterns and the
role played by the homegardens in meeting
household biomass fuel requirements. We believe the
results of this study will provide insight into the
prospective role of homegardens as an alternative
source of biomass fuel.
Materials and methods
Study area
For this study the Noakhali district was
selected purposively and the Sadar (also known as
Sudharam) upazila (administrative unit, sub-district)
was selected randomly from a list of six upazillas (i.e.
Begumganj, Chatkhil, Companiganj, Sadar, Senbagh
and Subarnachar) comprising the district.
Geographically the upazila lies between 22034/ to
22054/ N latitude and 90053/ to 91018/ E longitude
and is crossed by mighty Meghna river (SRDI 1999).
The Bay of Bengal borders the upazila on its southern
edge (Figure 1). The upazila is devoid of any kind of
public forests except some mangrove plantations in
the coastal areas, and is famous for its homestead
forest resources. The field survey was conducted in
Lalpur village of Binodpur union within the upazila.
Field techniques
Several field visits were arranged in the
study area for data collection between January to
August 2006. We followed a multistage random
sampling technique to locate the village and
households, with households as the ultimate
sampling unit. Households were categorized into
three distinct land holding categories through a
preliminary socio-economic survey, i.e. landless to
marginal household (<0.50 ha), small household
(0.51-1.00 ha) and medium to large household (1.00>
ha). Both agricultural lands and homesteads were
considered for this classification. Thirty households,
taking 10 from each of the land-holding categories,
were chosen randomly for the final study (Table 1).
Information regarding the homegardens and
household fuel consumption patterns were obtained
by interviewing the selected households and by
undertaking field visits to the respective
homegardens. For interviews we used a semi-
structured questionnaire where details about the
household’s homestead situation (i.e. homestead
size, species composition etc.), species preferences
and quality, fuel consumption pattern, quantity
S.A. Mukul et al. Homegardens can help save forests in Bangladesh
P a g e | 20 Int. J. of Res. on Land-use Sust. 1: 18-25 | 2014
Figure 1. Forest coverage in Bangladesh (highlighted in green) (left) and location map of study area in the
country (right) (Source: Banglapedia)
Table 1. Classification of the households and sampling intensity
Land
holding
category
Average
homestead
size
(decimal)
No. of total
household
(N)
Percentage
HH sampled
(%)
Landless
to
marginal
07 49 20
Small 15 52 19
Medium
to large
24 21 48
consumed (kg month -1 household-1), sources of
biomass fuel etc. were reco rded. Additional data
regarding each household’s demographic and socio-
economic status were also gathered. On each topic
households were free to express his/her vi ews.
Results
Structure and composition of the homegardens
The average homegarden size of the
households’ belonging to landless to marginal, small
and medium to large land holding categories in the
study area were, 0.07 (±0.01) ha, 0.14 (±0.04) ha and
0.19 (±0.01) ha respectively. Species compositions in
each homegarden varied according to the socio-
economic status of the owner. However, it was
observed that wealthier households’ homegardens
were richer in plant diversity than that of other
households. About 37 tree species, 4 palms, 3 grasses
and 3 species of shrubs and herbs were found in the
homegardens of the area. Plant species that were
used as a source of biomass fuel include: Acacia
auriculilformis, Aegle marmelos, Albizzia lebbeck,
Albizzia procera, Albizzia saman, Alstonia scholaris,
Anthocephallus chinensis, Areca catechu, Artocarpus
heterophyllus, Artocarpus lakoocha, Averrhoa
carambola, Azadirachta indica, Baccaurea ramiflora,
Bambusa balcooa, Bombyx ceiba, Borassus flabellifer,
Butea monosperma, Cassia fistula, Citrus acida, Cocos
nucifera, Delonix regia, Dillenia indica, Diospyros
discolor, Diospyros embryopteris, Elaeocarpus
robustus, Erythrina variegata, Eucalyptus
camaldulensis, Ficus roxburghii, Garcinia cowa,
Lannea coromandelica, Mangifera indica, Melia
azedarach, Melocanna baccifera, Moringa oleifera,
Musa spp., Odina wodier, Phoenix sylvestris,
Phyllanthus acidus, Psidium guajava,
Schumannianthus dichotoma, Swietenia macrophylla,
Syzygium cumini, Syzygium grandis, Tamarindus
indica, Terminalia catappa, Typha elephantine and
Homegardens can help save forests in Bangladesh S.A. Mukul et al.
Int. J. of Res. on Land-use Sust. 1: 18-25 | 2014 P a g e | 21
Zizyphus mauratiana. Figure 2 below shows the vertical
composition of species in the homegardens in the area.
Figure 2. Vertical stratification of a homegarden in
the study area (top); and a typical homegarden edge
dominated by palms and tall species (bottom)
Biomass fuel used by the households
Fuelwood was the most commonly used
biomass fuel by the respondents – it contributed
around 56% of total households’ fuel consumption.
Other kinds of fuel used by the households were fallen
leaves, dung cake and dung sticks, crop residues and
others (e.g. bio-gas, saw mill residues). Household fuel
consumption is shown in Figure 3. Household fuel
consumption patterns differed considerably according
to their wealth status and the seasons, which
influenced the access of households’ to different kinds
of biomass fuel (Table 2). Wealthier households were
more likely to use fuelwood, on average 24.0
kg/month, thereby constituting the highest share in
their fuel consumption. Poorer households, on the
other hand, mainly used dried fallen leaves and dung
cake/ sticks as their fuel for cooking. Agricultural crop
residues, like rice husks and straw were also used
extensively by households after the harvesting of these
crops took place. Household usage of leaves as fuel
increased during the winter season due to greater
availability, whilst the use of firewood went down
during the monsoon due to their incombustibility as a
result of the higher moisture content.
Figure 3. Energy use in the study area by consumption
Sources and preferences of biomass fuel
Homegardens were a major source of biomass
fuel for 87% of the respondents in the area, and
contributed about 58% of the households’ total fuel
consumption for domestic cooking and other purposes.
In fact homegardens were a major source of biomass
fuel for households from all three land holding
categories (Table 3). Households were also found to
collect biomass fuel from neighbors (16%),
government’s fallow land (14%) – mainly from road-
side plantations and nearby markets (Figure 4).
Households belonging to the landless to marginal land-
holding category collected a considerable amount
(20.2%) of fuel from public and fallow land and from
neighbours (15.0%). Households in this category also
purchased 20.4% of their domestic fuel from markets.
The most preferred fuel species, parts consumed and
their abundance in local homegardens are listed in
Table 4. In general, households were most likely to
prefer the species that were lighter in weight and had
higher calorific value.
S.A. Mukul et al. Homegardens can help save forests in Bangladesh
P a g e | 22 Int. J. of Res. on Land-use Sust. 1: 18-25 | 2014
Table 2. Monthly household biomass fuel consumption (in Kg)
Land holding category Fuel type
Fuelwood Dried leaves Dung cake Crop residues Others
Landless to marginal 15.8 (±3.49)
8 (±3.46)
6.3 (±1.34)
4.6 (±0.97)
2.1 (±0.74
Small 16.40 (±3.24)
9.50 (±4.33)
5.90 (±3.35)
0.80 (±1.14)
0.60 (±0.70)
Medium to large 24.00 (±3.40)
3.00 (±2.16)
1.50 (±1.96)
0.50 (±0.71)
0.20 (±0.42)
Table 3. Biomass fuel sources (in terms of % share) of different households
Land holding category Source
Homegarden Neighbour Market Public/Fallow land
Landless to marginal 58.7 (±8.84)
15 (±6.68)
6.1 (±3.21)
20.2 (±4.49)
Small 58.8 (±8.80)
17.2 (±8.28)
11.4 (±4.33)
12.6 (±8.80)
Medium to large 56.1 (±6.23)
15.1 (±10.7)
20.4 (±5.40)
8.4 (±6.92)
Table 4. Preferences for species as biomass fuel
Botanical name Local name Parts used Occurrence Preference*
Cocos nucifera Narikel Petiole, Fruit +++ +++
Albizzia spp. Koroi Leaves, Wood ++ +
Areca catechu Supari Petiole +++ +
Terminalia catappa Katbadam Leaves, wood +++ ++
Mangifera indica Am Leaves, wood ++ ++
Bombyx ceiba Shimul Wood ++ +++
Erythrina indica Madar Wood ++ +++
Bambusa spp. Bamboo Sheath, twigs +++ ++
Typha elephantina Hogla Grass +++ ++
Oryza sativa Dhan Husk, Straw +++ +++
* Ranked by respondents as: +++ high; ++ moderate, and + low
Figure 4. Different sources of biomass fuel in the study area
Collection and storage of biomass fuel
In general, women and children were
responsible for the collection of biomass fuel in the
area. No systematic method of biomass fuel collection
was evident. When harvesting from their own
homegardens, households usually preferred the parts
of the plant that were defected or had no alternate
use. Biomass fuel was stored by households during the
rainy season for future use. However, there was no
specific place for storage - any vacant area with a roof
served for storage purposes. Households used any
location close in proximity to their residence during the
dry season for storage purposes (Figure 5).
Discussion
The findings of our study are coherent with
the findings of several other authors who have also
conducted their studies in similar regions in Bangladesh
(see for example: Miah et al. 1990, 2003; Jashimuddin
et al. 2006). In their studies, Miah (2003) and
Jashimuddin et al. (2006) also found that homegardens
Homegardens can help save forests in Bangladesh S.A. Mukul et al.
Int. J. of Res. on Land-use Sust. 1: 18-25 | 2014 P a g e | 23
Figure 5. Stack of firewood for future use (top) and
straw collected from paddy for multiple application
(bottom)
were a major source of household domestic fuel.
Fuelwood was the most common form of biomass
derived from homegardens, representing over half of
households’ biomass consumption. Miah et al. (2003,
2011) also reported similar trends in the Chittagong
and Noakhali districts of the country.
In Bangladesh, 39.5% people are still relying on
woodfueld for domestic cooking purpose (FAO 2014).
An estimated 88% of all wood products in the country
are still drawn from homegardens (Poffenberger 2000),
suggesting that homegardens and trees outside of
forests generally act as a major source of biomass fuel.
Biomass fuel is also preferable to fossil fuels when
considering climate change regulations (Koh and
Ghazoul 2008). In countries like Bangladesh, biomass
fuel is also more affordable for rural households who
have limited access to advanced technologies for
cooking and other domestic purposes (Chowdhury et
al. 2011).
In tropical developing countries where the majority of
forests are poorly delineated and/or unregulated,
unsustainable biomass fuel collection may lead to
deforestation and forest degradation (Mukul et al.
2014). Biomass fuel collection from forests also
involves gathering of litter from the forest floor, and as
a result there is often complete removal of young
seedlings and saplings, aggravating forest degradation
through nutrient depletion, soil erosion and poor
regeneration (Sherstha 2005). In Bangladesh, like many
other tropical regions, an increasing focus on the the
importance of conservation has resulted in stricter
forest protection regimes. Consequently, household
access to state forests is becoming increasingly limited
(Uddin et al. 2013). In many forested areas, however,
traditional forest uses are still common and are sources
of forest conflicts (Mukul et al. 2013; Mukul 2014).
Under these circumstances, homegardens can
undeniably help to reduce pressure on existing public
forests and thus enhance forest conservation efforts.
Conclusion
As alternatives to biomass fuels are still scarce
in tropical developing countries, forests are still a vital
source of biomass fuel. Our study clearly demonstrates
that in areas where household access to public forests
is limited and/or forests are scarce, homegardens can
play an important role. However, the promotion of
homegardens is not a long-term solution in the fight
against deforestation. In areas where unsustainable
harvesting is leading to forest loss and degradation,
homegardens can act as an initial alternative to
biomass harvesting from forests. Governments can
allow land-less and marginal people to have access to
plantations in governments’ fallow lands and public
areas - including roads, railways and canal banks. It is
recommended that fast growing species with high
calorific values and substantial growth and branching
capacity are used in such plantations.
Acknowledgement
An abridged version of this paper has been presented in the Swedish Bioenergy Conference held in Jonkoping, Sweden. The authors would also like to thanks Dr. Johan Vinterback (Swedish Bioenergy Association) and Dr. Hubertus Pohris (Technische Universität Dresden, Germany) for their valuable comments on an earlier draft of this manuscript.
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