Soil nutrient depletion and population growth in sub-Saharan Africa: A Malthusian nexus?
Soil nutrient depletion and population growth in sub-Saharan Africa: A Malthusian nexus?
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DOI：
10.1023/a:1006701806772
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发表时间：
2001-03-01
影响因子：
3.3
通讯作者：
de Vries, FP
中科院分区：
文献类型：
--
作者：
Drechsel, P;Kunze, D;de Vries, FP
土壤养分开采和其他形式的土壤退化威胁着未来的土壤生产力，特别是在撒哈拉以南非洲。来自撒哈拉以南非洲36个国家的数据显示，在超国家层面上，土壤养分消耗（包括侵蚀）、休闲期减少和人口压力之间存在显着关系，从而说明了非洲大陆不可持续的人口-农业-环境关系，迄今为止仅在案例研究中描述过。看来马尔萨斯机制正在发挥作用，尽管有令人鼓舞的迹象表明农民的关切和适应不断变化的条件。人们一致认为，重新审查共同的土地退化评估和农民对不断变化的条件的反应将是有益的，但是，这不应拖延其他建议的干预措施。
Soil nutrient mining and other forms of soil degradation threaten future soil productivity, especially in sub-Saharan Africa (SSA). Data from 36 countries in SSA show a significant relationship at the supra-national level between soil nutrient depletion (including erosion), reduced fallow periods, and population pressure and thus illustrate the unsustainable population-agriculture-environment nexus on the continent which so far has been described in case studies only. It appears that Malthusian mechanisms are at work, despite encouraging indications of farmers' concerns and adaptation to changing conditions. It is agreed that a re-examination of the common land degradation assessments and farmers' response to changing conditions would be useful, however, this should not delay other recommended interventions.