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在大米生长季节通过灌策略缓解气候变化,在休季节被抵消

Sebastián Echeverría-Progulakis¹, Néstor Pérez-Méndez², Marc Viñas³

¹IRTA, Marine and Continental Waters Program, La Ràpita, 43540, Catalonia, Spain; IRTA, Sustainable Field Crops Program, Amposta, 43870, Catalonia, Spain.

Journal of environmental management

|April 3, 2025

概括

替代性湿和干燥 (AWD) 和中季排水 (MSD) 减少了田生长季的甲排放. 然而,由于休季的甲释放量较高,AWD增加了年度总体排放量.

科学领域:

农业科学农业科学
环境科学环境科学
土壤科学土壤科学

背景情况:

田中的非连续灌,如AWD和MSD,可以减少用水量和甲排放.
众所周知,生长季节的缓解效应已知,但休季的影响还没有得到充分研究.
休息季节可以显著促进大米农业生态系统的年度甲排放.

研究的目的:

调查生长季节交替湿和干燥 (AWD) 和中季排水 (MSD) 在随后的被洪水淹没的休季节对甲排放的影响.
为了比较这些效应与持续淹水的田.
分析土壤微生物群落结构与灌实践和甲排放有关.

主要方法:

在埃布罗三角洲进行实地实验,比较AWD,MSD和连续洪水灌策略.
在生长和休季节测量甲 (CH4) 流量.
对土壤微生物群落结构的分析,重点关注甲原体和甲类植物.

主要成果:

与连续洪水相比,AWD和MSD都将生长季节的CH4流量减少了86%.
替代性湿和干燥 (AWD) 导致地季节的CH4排放量显著增加,增加了年度总体排放量和全球变暖潜力.
增长季节的AWD减少了休季的甲基和甲类植物的丰富性,可能会损害甲消耗.

结论:

当考虑整个年度周期时,中季排水 (MSD) 似乎是一个比AWD更有效的气候变化缓解策略.
评估大米的气候变化缓解需要评估生长季节和休季节.
土壤微生物社区的动态对于确定不同灌策略对气候净影响至关重要.

关键词:

温室气体排放量排放量温室气体排放量遗留后的效应遗留后的效应米是什么意思米是什么意思土壤微生物学土壤微生物学水资源管理水资源管理

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