globalchange  > 气候减缓与适应
DOI: 10.2166/wcc.2016.153
论文题名:
Assessment of climate change impact on crop yield and irrigation water requirement of two major cereal crops (Rice and wheat) in Bhaktapur district, Nepal
作者: Shrestha L.; Shrestha N.K.
刊名: Journal of Water and Climate Change
ISSN: 20402244
出版年: 2017
卷: 8, 期:2
起始页码: 320
结束页码: 335
语种: 英语
英文关键词: AquaCrop ; Climate change ; PRECIS ; Rice ; Wheat
英文摘要: Rice and wheat are major cereal crops in Nepal. Climate change impacts are widespread and farmers in developing countries like Nepal are among the most vulnerable. A study was carried out to assess the impact of climate change on yield and irrigation water requirement of these cereal crops in Bhaktapur, Nepal. Laboratory and soil-plant-air-water analysis showed silt-loam being the most dominant soil type in the study area. A yield simulation model, AquaCrop, was able to simulate the crop yield with reasonable accuracy. Future (2030–2060) crop yield simulations, on forcing the Providing Regional Climates for Impacts Studies (PRECIS) based on regional circulation model simulation indicated decreased (based on HadCM3Q0 projection) and increased (based on ECHAM5 projection) yield of monsoon rice for A1B scenario, and rather stable yield (for both projection) of winter wheat. Simulation results for management strategies indicated that the crop yield was mainly constrained by water scarcity and fertility stress emphasizing the need for proper water management and fertilizer application. Similarly, a proper deficit irrigation strategy was found to be suitable to stabilize the wheat yield in the dry season. Furthermore, an increase in fertilizer application dose was more effective in fully irrigated conditions than in rainfed conditions. © IWA Publishing 2017.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67557
Appears in Collections:气候减缓与适应

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作者单位: Center for Post-Graduate Studies, Nepal Engineering College (necCPS), Pokhara University, Kathmandu, Nepal; Narayan Kumar Shrestha Faculty of Science and Technology, Athabasca University, Edmonton, AB, Canada

Recommended Citation:
Shrestha L.,Shrestha N.K.. Assessment of climate change impact on crop yield and irrigation water requirement of two major cereal crops (Rice and wheat) in Bhaktapur district, Nepal[J]. Journal of Water and Climate Change,2017-01-01,8(2)
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