Six decades of agricultural land use change in Bangladesh: Effects on crop diversity, productivity, food availability and the environment, 1948–2006
Six decades of agricultural land use change in Bangladesh: Effects on crop diversity, productivity, food availability and the environment, 1948–2006
复制标题
孟加拉国农业土地利用变化六十年：对作物多样性、生产力、粮食供应和环境的影响，1948-2006
DOI：
10.1111/j.1467-9493.2010.00394.x
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发表时间：
2010
影响因子：
2.2
通讯作者：
S. Rahman
中科院分区：
文献类型：
--
作者：
S. Rahman
本文详细分析了孟加拉国59年（1948-2006年）的农业土地利用变化，并探讨了这些变化对作物多样性、生产力、粮食供应和环境的影响。分析的主要结果是：第一，在此期间，土地使用强度显著增加，主要是由于1960年代初开始广泛采用以水稻为基础的绿色革命技术包;第二，与预期相反，作物多样性也增加了;第三，虽然土地生产力有了很大提高，化肥和杀虫剂生产力下降，使人对农业可持续增长产生怀疑;第四，粮食供应情况有所改善，尽管人口增长率很高，但近年来饮食能量不平衡的情况有所扭转;最后，许多农业生态区的土壤养分普遍枯竭，生产环境受到影响。政策含义指出，作物多样化是孟加拉国农业增长的理想战略，以提高农业的资源经济、生产力和效率。
This paper provides a detailed analysis of agricultural land use change in Bangladesh over a 59-year period (1948–2006) and examines how these have impacted crop diversity, productivity, food availability and the environment. The key findings of the analysis are: first, land use intensity has increased significantly over this period, mainly from the widespread adoption of a rice-based Green Revolution technology package beginning in the early 1960s; second, contrary to expectation, crop diversity too has increased; third, although land productivity has increased significantly, declines in the productivity of fertilizers and pesticides raise doubts over sustaining agricultural growth; fourth, food availability has improved, with a reversal in the dietary energy imbalance in recent years despite a high population growth rate; and finally, the production environment has suffered with widespread soil nutrient depletion experienced in many agroecological regions. The policy implication points towards crop diversification as a desired strategy for agricultural growth to improve resource economy, productivity and efficiency in farming in Bangladesh.