Yield trends under varying environmental conditions for sorghum and wheat across Australia
Yield trends under varying environmental conditions for sorghum and wheat across Australia
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DOI：
10.1016/j.agrformet.2016.07.004
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发表时间：
2016-11-15
影响因子：
6.2
通讯作者：
Brider, Jason
中科院分区：
文献类型：
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作者：
Potgieter, Andries B.;Lobell, David B.;Brider, Jason
无论是在全球还是在国家，粮食生产都受到气候和市场波动加剧的影响。在过去的30年里，澳大利亚高粱产量的趋势一直是稳定和积极的，而全球其他谷物如小麦、玉米和水稻的产量趋势已经放缓。澳大利亚之所以引起人们的兴趣，不仅是因为它是世界市场上的主要出口国，而且还因为它在开发有助于减少干旱条件下产量损失风险的作物和做法方面投入了大量的研究工作。本研究考察了澳大利亚高粱和小麦在过去三、四十年的产量趋势，实际考虑了每年气候变化的影响。我们量化了三种不同作物胁迫环境（即DRY: ENVT1， MODERATE: envt2和wet: ENVT3）下的产量趋势。高粱产量的总体趋势为每年2.1%（44公斤/公顷/年），几乎是小麦产量（每年1.2%，21公斤/公顷/年）的两倍。然而，在干燥环境下，高粱的相对产量趋势是小麦的3.6倍，而在潮湿环境下，趋势相似。讨论了支撑这些趋势的可能的技术和环境因素。(C) 2016 Elsevier B.V.版权所有
Globally as well as nationally, food production is being exposed to increased climatic and market volatility. The trend in sorghum yield in Australia has been consistent and positive over the last 30 years, while yield trends globally for other cereals like wheat, maize and rice have slowed. Australia is of interest not only as a major exporter in world markets, but also because considerable research effort has been focused on developing crops and practices that help to reduce the risks of yield losses under drought conditions. This studyexamines sorghum and wheat yield trends over the previous three to four decades in Australia after realistically accounting for the effects of year-to-year climate variability. We quantified the yield trends within three distinct types of crop stress environments (i.e. DRY: ENVT1, MODERATE: ENVT2&WET: ENVT3). Overall trends in sorghum yields were 2.1% per year (44 kg/ha/year), which was nearly double that found for wheat (1.2% per year; 21 kg/ha/year). However, in dry environments, relative yield trends for sorghum were 3.6 times those for wheat, whereas in wet environments trends were similar. Likely technology and environmental factors underpinning these trends are discussed. (C) 2016 Elsevier B.V. All rights reserved.