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生物炭应用方法对温室气体排放和利用效率在田中的影响

Yanze Zhao¹, Hongfang Jiang¹, Jiping Gao¹

¹Rice Research Institute, Shenyang Agricultural University/National and Local Joint Engineering Laboratory of Japonica Rice Breeding and Cultivation Technology in North China, Shenyang 110866, China.

The Science of the total environment

|January 6, 2024

概括

在大米种植中应用生物炭显著提高了作物产量和使用效率,同时减少了温室气体排放. 一次性生物炭应用 (B1) 对甲缓解有效,而重复应用 (B2) 随着时间的推移增强了土壤的特性.

科学领域:

农业科学农业科学
土壤科学土壤科学
环境科学环境科学

背景情况:

生物炭在米生产中的应用被认为具有降低气损失和温室气体排放的潜力.
优化生物炭应用方法和含量对于最大限度地提高大米种植效益至关重要.

研究的目的:

评估两种不同的生物炭应用策略对土壤特性,温室气体排放和大米生产力的长期影响.
为了比较单次与重复的生物炭应用的疗效,与不同的肥率相结合.

主要方法:

在现场实验进行了三年,使用两种生物炭应用方法 (B1: 15 t ha-1一次; B2: 5 t ha-1 yr-1三次) 和两种水平 (N210: 210 kg N ha-1; N168: 168 kg N ha-1).
分析包括土壤的物理化学特性,甲 (CH4) 和氧化 (N2O) 排放,功能基因丰度 (pmoA,AOB,nirK,nosZ),水产量和使用效率 (NUE).

主要成果:

这两种生物炭方法都改善了土壤的特性,重复应用 (B2) 显示了土壤有机物和营养成分的长期益处.
单次应用 (B1) 显示出优异的甲 (CH4) 缓解由于更高的pmoA基因丰度,而B2 显示出更大的N2O减少在以后的几年.
随着生物炭的应用,大米产量增加,特别是在N210B1和N210B2处理下. 在三年内,所有生物炭处理都提高了使用效率.

结论:

单次和重复的生物炭应用都对提高大米产量和减轻温室气体产生有希望.
单个生物炭应用 (B1) 与减少 (168公斤N ha-1) 的组合提供了一种改善NUE和减少温室气体的策略,而不会影响产量.

关键词:

生物炭是一种生物炭.温室气体温室气体是一种温室气体.的使用效率效率.大米大米大米大米大米

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