[不同应用措施对小麦-玉米旋转系统中N2O排放的影响]
Lian-Feng Cai1,2, Xue-Xia Wang2,3, Jia-Chen Wang2,3
1College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China.
Huan jing ke xue= Huanjing kexue
|October 25, 2024
概括
控制释放肥料,特别是抑制剂类型的肥料,显著降低了北中国的氧化 (N2O) 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:
- 来自农田土壤的氧化 (N2O) 排放是一个重要的环境问题.
- 肥管理实践对农业系统中的N2O排放产生了重大影响.
- 了解小麦-玉米旋转系统中的N2O动态对于中国北部的可持续农业至关重要.
研究的目的:
- 评估不同应用策略对N2O排放的影响.
- 为了确定影响小麦-玉米旋转系统中N2O排放的因素.
- 评估控制释放肥料在减轻N2O排放方面的有效性.
主要方法:
- 实地实验比较了六种应用处理:没有施肥 (CK),常规尿素 (U1),优化尿素 (U2),用控制释放化肥 (SRU1),控制释放肥料 (SRU2) 和抑制剂类型控制释放肥料 (ISRU) 的尿素.
- 测量N2O排放流和土壤物理化学性质.
- 在N2O排放和土壤特性 (水分,N,酸N,微生物碳和) 之间的相关性分析.
主要成果:
- 与常规尿素 (U1) 相比,控制释放肥料 (SRU1,SRU2,ISRU) 显著降低了N2O排放峰值和频率.
- 在玉米季节 (58.1%-65.1%) 的N2O排放流量高于小麦季节.
- 在玉米季节使用抑制剂类型控制释放肥料 (ISRU) 增加了产量 (14.6%) 和净经济效益 (18.6%),同时减少了N2O排放.
结论:
- 一次性应用抑制剂类型的控制释放肥料是减少N2O排放和提高玉米种植经济效益的有效策略.
- 土壤水分,,酸,微生物碳和是与N2O排放相关的关键因素.
- 优化管理,特别是使用可控释放肥料,对于中国北部的可持续农业至关重要.
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