探讨纳米比亚在不同气候条件下接种牛的好处
Livia Rasche1, Joscha N Becker2, Percy Chimwamurombe3
1Research Unit Sustainability and Climate Risks, Universität Hamburg, Grindelberg 5, 20144, Hamburg, Germany. livia.rasche@uni-hamburg.de.
Scientific reports
|July 20, 2023
概括
在撒哈拉以南非洲的小农农户中,用根茎植物注射牛种子可以提高产量. 然而,在日益干燥和炎热的未来气候条件下,这种做法的好处显著减少.
科学领域:
- 农业科学 农业科学
- 农业学是一种农业学.
- 适应气候变化 适应气候变化
背景情况:
- 牛 (Vigna uniculata L. Walp) 是撒哈拉以南非洲小农的重要食物来源.
- 它们的产量受到根结核中的共生根茎细菌的影响,这些细菌固定大气.
- 用有效的根茎菌株对种子进行注射可以提高牛的性能,但在各种气候中数据有限.
研究的目的:
- 在各种气候变化场景下建模牛种子注射的有效性.
- 评估疫苗接种对撒哈拉以南非洲牛产量的影响.
主要方法:
- 使用预测模型,从纳米比亚提升两个实地实验的规模.
- 模拟不同气候变化预测下的牛产量.
主要成果:
- 没有接种的牛豆平均产量为0.5t/ha,而接种的牛豆平均产量为1t/ha.
- 在有利的凉爽和潮湿条件下,接种的产量增加更高 (超过1t/ha).
- 在干旱年 (降雨量<200毫米) 中,接种和未接种牛豆的产量差异仅为0.1t/ha.
结论:
- 用有效的根茎菌株对牛种子进行注射,可以在各种气候条件下显著提高产量.
- 由于干旱和炎热年份的增加,疫苗接种的产量优势预计将在未来减少.
- 到2080年至2100年,气候变化可能会降低撒哈拉以南非洲小农户牛接种的有效性.
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