减少碳足迹和增加生态系统的净经济效益通过密集种植减少气在双作物米系统的种植
Wentao Zhou1, Wenfei Long1, Hongrui Wang1
1Key Laboratory of Crop Physiology and Molecular Biology Ministry of Education of the People's Republic of China, College of Agronomy, Hunan Agricultural University, Changsha 410128, China.
The Science of the total environment
|June 9, 2023
概括
在大米种植中使用较少气 (DPLN) 的密集种植显著减少温室气体 (GHG) 排放并提高产量. DR3战略优化了这种方法,减少了碳足迹,增强了经济效益.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 农业学是一种农业学.
背景情况:
- 在大米系统中过度化肥导致浪费,污染和温室气体 (GHG) 排放.
- 密集种植是减少在米生产中使用肥的有效策略.
- 密集种植用较少气 (DPLN) 对碳足迹 (CF) 和生态系统净经济效益 (NEEB) 的综合影响需要进一步研究.
研究的目的:
- 调查DPLN战略对温室气体排放,大米产量,CF和NEEB在双种大米系统中的影响.
- 确定最佳的DPLN战略,以减少对环境的影响,并最大限度地提高经济回报.
主要方法:
- 实地实验是在一个双重种植大米的地区进行的.
- 处理包括常规种植 (CK),三个DPLN级别 (DR1,DR2,DR3) 具有不同的缩和种植密度,以及无控制 (N0).
- 测量包括甲 (CH4) 排放,大米产量,总初级生产率 (GPP),直接温室气体排放和NEEB.
主要成果:
- 与CK相比,DPLN显著降低了7.56%36%的平均CH4排放量,并增加了2.16%12.37%的年度大米产量.
- DR3处理 (42%的气减少,120,000个山/公密度增加) 显示了最高的NEEB,比CK大25.38%.
- DR3 增加了 16.04% 的 GPP,并减少了 13.1% 的直接温室气体排放,这表明米生态系统充当了碳汇.
结论:
- 优化DPLN策略有效地减少了碳足迹,并增强了双重作物水系统的生态系统净经济效益.
- 直接的温室气体排放和GPP驱动的碳固定是影响这些系统CF的关键因素.
- DR3战略在减少CF和改善NEEB之间取得了最佳平衡.
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