绿色化肥改变了耕地中的反应性损失和池:一项元回归研究
Bing Xu1, Dongyang Gui1, Hongbo Peng1
1Yunnan Provincial Field Scientific Observation and Research Station on Water-Soil-Crop System in Seasonal Arid Region, Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, China.
The Science of the total environment
|May 19, 2024
概括
绿色化肥增强了土壤的和碳,但可以增加氧化排放. 这种做法减少了的漏和氨的挥发,特定的方法影响了总体的损失.
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:
- 绿色化肥 (GM) 是一种保护农业技术,可以改善土壤健康和作物产量.
- 转基因修改增加了土壤活性 (N) 和碳 (C) 池,可能加速N转化和损失.
- 虽然研究了覆盖作物的N2O排放,但机制和其他N损失仍然不清楚.
研究的目的:
- 综合分析转基因修改对土壤反应性N (Nr) 损失的影响,包括N2O排放,氨 (NH3) 挥发以及N出/流失.
- 调查转基因对土壤N池和N循环功能基因丰度的影响.
- 澄清与绿色化肥相关的损失背后的驱动机制.
主要方法:
- 一个对109篇发表文章的元分析,包括517个对联观察.
- 转基因对N2O排放,NH3挥发,N漏,N池 (微生物生物质N,NO3--N) 和N循环基因的量化影响.
- 根据转基因类型 (豆类与非豆类),N输入策略,应用方法,土壤pH,N应用率 (NAR) 和平均年降水率 (MAP) 分析了N损失的变化.
主要成果:
- 转基因生物增加了土壤微生物生物质N和NO3-N度.
- 转基因刺激了N2O排放,但显著减少了N漏和产量规模的NH3挥发.
- 基于豆类的转基因,来自转基因 (GMN) 的额外N,以及短期的转基因增加了N2O排放;非豆类的转基因,部分矿物N被转基因替代,表面应用或田应用减轻了NH3损失.
- NH3挥发与土壤pH和NAR正相关,与MAP负相关.
结论:
- 绿色化肥显著影响土壤的N保留和损失动态.
- 优化转基因物种选择和矿物N输入对于最大限度地减少农业实践中的N损失至关重要.
- 了解不同N损失途径之间的权衡对于可持续绿色化肥实施至关重要.
相关概念视频
Overview of Nitrogen Metabolism
7.9K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
7.9K
Key Elements for Plant Nutrition
18.7K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
18.7K


