The influence of previous land-use on stand structure and economic yield in tropical agroforests of Bangladesh

IF 2.2 3区 农林科学 Q2 AGRONOMY
Md. Tanbheer Rana, S. M. Kamran Ashraf, Kazi Kamrul Islam
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Abstract

Agroforestry offers opportunities to combine nature conservation and agricultural economic yield. In the tropics, agroforestry is often implemented in lands derived from the conversion of forest or the utilization of barren land. We assessed the influence of previous land-use practices on stand structures and income generated from different agroforests in Bangladesh’s Sal (Shorea robusta) forest region. The ecological data were collected from the selected plots with various measuring instruments (measuring tape, relascopes, etc.), and the economic data were generated from surveys among the farmers, group discussions, and previous research works in the study area. The tree basal area was high in forest (32.1 m2/ha) and in forest-derived agroforestry plots (25.7 m2/ha). In fallow land, basal area was 7.2 m2/ha and in fallow-derived agroforestry 17 m2/ha. Thus, in tree basal area and other stand structural variables such as canopy cover, a clear pattern with previous land-use was revealed. According to interviews with the farmers, the economic outcome obtained by cultivating pineapple, ginger, and other crops was around 3000 €/ha/year with no statistically significant difference between forest-derived and fallow-derived agroforestry. Our data suggest that tree canopy cover is income-neutral in these agroforestry systems. The findings suggest options for income generation in forests, which in terms of nature conservation would stand for degradation. It underscores the opportunities for agroforestry on former fallow land, which offers win–win solutions for improving human livelihoods and ecosystem restoration.

孟加拉国热带农林复合林中以往土地利用对林分结构和经济产量的影响
农林业提供了结合自然保护和农业经济产量的机会。在热带地区,农林业往往是在由森林转化或利用贫瘠土地而来的土地上实施的。我们评估了孟加拉国Sal (Shorea robusta)林区以前的土地利用做法对林分结构和不同农林业产生的收入的影响。生态数据通过各种测量仪器(卷尺、松散仪等)在选定的样地收集,经济数据通过农户调查、小组讨论和研究区内的前期研究工作获得。森林和林源农林业样地的树基面积分别为32.1 m2/ha和25.7 m2/ha。在休耕地,基底面积为7.2 m2/ha,在休耕农林业中,基底面积为17 m2/ha。因此,在树基面积和其他林分结构变量(如冠层盖度)中,揭示了与以往土地利用的明显格局。根据对农民的采访,种植菠萝、生姜等作物的经济效益在3000欧元/公顷/年左右,林源农林业与休耕农林业之间没有统计学上的显著差异。我们的数据表明,在这些农林复合系统中,树冠覆盖与收入无关。研究结果提出了在森林中创造收入的各种办法,从自然保护的角度来说,森林就是退化。它强调了在前休耕土地上开展农林业的机会,为改善人类生计和恢复生态系统提供了双赢的解决方案。
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来源期刊
Agroforestry Systems
Agroforestry Systems 农林科学-林学
CiteScore
5.30
自引率
9.10%
发文量
78
审稿时长
4.5 months
期刊介绍: Agroforestry Systems is an international scientific journal that publishes results of novel, high impact original research, critical reviews and short communications on any aspect of agroforestry. The journal particularly encourages contributions that demonstrate the role of agroforestry in providing commodity as well non-commodity benefits such as ecosystem services. Papers dealing with both biophysical and socioeconomic aspects are welcome. These include results of investigations of a fundamental or applied nature dealing with integrated systems involving trees and crops and/or livestock. Manuscripts that are purely descriptive in nature or confirmatory in nature of well-established findings, and with limited international scope are discouraged. To be acceptable for publication, the information presented must be relevant to a context wider than the specific location where the study was undertaken, and provide new insight or make a significant contribution to the agroforestry knowledge base
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