Agronomic and Socio-economic Assessment of the Introduction of a Rice-Based Mixed Cropping System to Cuvelai Seasonal Wetland System in Northern Namibia
Agronomic and Socio-economic Assessment of the Introduction of a Rice-Based Mixed Cropping System to Cuvelai Seasonal Wetland System in Northern Namibia
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纳米比亚北部库韦莱季节性湿地系统引入水稻混作制度的农艺和社会经济评估
DOI：
10.1080/03031853.2021.1917429
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发表时间：
2021
期刊：
影响因子：
1.3
通讯作者：
Iijima M
中科院分区：
文献类型：
--
作者：
Hirooka Y;Masuda T;Watanabe Y;Izumi Y;Inai H;Awala S.K;Iijima M
在非洲南部的半干旱地区，安哥拉和纳米比亚边界附近，雨季的洪水形成了Cuvelai季节性湿地系统。本研究的目的是从农艺、社会和经济的角度评估在季节性湿地（当地语言为ondombein）引入以水稻为基础的混合种植系统的影响。为此，我们在纳米比亚北部使用了一种简单的方法和多学科方法进行产量和住户调查以及情景分析。产量调查显示，即使在干旱年份，水稻的产量表现也高于珍珠粟和高粱。农户调查显示，在ondombe引进以水稻为基础的混合种植可以通过减少劳动力和提供高水稻产量来帮助当地农民提高作物生产力。此外，根据在这些地区进行的产量调查和住户调查进行的情景分析表明，即使在干旱年份，混合种植制度的实施也可以弥补政府紧急粮食进口预算的四分之一。因此，该系统是研究区域农业可持续生产和环境管理的有效选择。
In the semi-arid regions of southern Africa, around the borders of Angola with Namibia, the Cuvelai seasonal wetland system is formed by floods during the rainy season. The objective of the present study was to assess the effects of introduction of a rice-based mixed cropping system to the seasonal wetlands (ondombein the local language) from agronomic, social, and economic perspectives. For this purpose, we used a simple methodology with a multidisciplinary approach for yield and household survey and scenario analysis in northern Namibia. The yield survey revealed that inondombe, rice showed a higher yield performance than that of pearl millet and sorghum, even in a drought year. The farm household survey showed that introducing a rice-based mixed cropping to ondombe could help local farmers enhance crop productivity by reducing labour and providing high rice yield. In addition, scenario analysis based on the yield and household surveys conducted in these regions suggested that the introduction of the mixed cropping system toondombecould compensate for one-fourth of the governmental urgent food import budget even in drought years. Therefore, this system is an effective option for sustainable agricultural production and environmental management in the studied region.