在盐土中应用的冷却阶段有机肥增加了土壤宏观聚合物和聚合物相关碳的含量
Hongmei Bai1, Shuhui Chen2, Yajie Li1
1Inner Mongolia Academy of Agricultural & Animal Husbandry Science, Hohhot, China.
PloS one
|September 17, 2025
概括
冷却阶段有机肥 (CPOF) 通过促进聚合物形成,有效改善盐土结构和稳定性. 这种过渡性堆肥增强了土壤的物理性质和碳捕获,为土壤整治提供了可持续的解决方案.
科学领域:
- 土壤科学 土壤科学
- 环境科学 环境科学
- 微生物学 微生物学
背景情况:
- 土壤聚合物的形成和稳定对于盐土壤整治至关重要.
- 冷却阶段有机肥 (CPOF),一个过渡式堆肥阶段,在土壤改善中的作用仍未得到充分探索.
- 了解CPOF对土壤物理性质和碳动态的影响对于可持续农业至关重要.
研究的目的:
- 为了比较CPOF与其他堆肥阶段的有机肥的有效性,提高土壤宏积分的比例和稳定性.
- 阐明CPOF的有机成分在不同的聚合物大小中影响碳物种化的机制.
- 评估CPOF作为用于盐土恢复和碳捕集的土壤修改剂.
主要方法:
- 对CPOF对盐土聚合物系统的监管影响进行系统性调查.
- 对CPOF与初始,热友和成熟的堆肥进行对土壤物理性质和聚合物动态的比较.
- 在CPOF处理下分析聚合物大小分数内的碳物种化.
主要成果:
- CPOF显著改善了土壤的物理性质,减少了18.5%的散装密度,增加了22.3%的多孔性.
- CPOF促进了宏积体的形成和稳定性,归因于微生物细胞外聚合物物质 (EPS) 和真菌蛋白相关的土壤蛋白质 (GRSP).
- 在CPOF中,宏积聚物中的有机碳含量增加了18-22% ,在540天内显示持续稳定性.
结论:
- CPOF是一种高效的修改剂,可以改善盐土结构,聚合物稳定性和碳捕集.
- 采用两阶段的应用策略 (CPOF,然后是成熟的堆肥) 可以将碳封存效率提高15-20%.
- CPOF为盐土恢复和气候智能农业提供了可扩展和可持续的解决方案.
相关概念视频
02:02Responses to Salt Stress
14.5K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
14.5K
01:10Moisture Content and Bulking of Aggregate
421
The moisture content of aggregates is a crucial factor in construction, particularly in concrete mixing, as it influences the total water required in the mix. Moisture content represents the water coated on the exterior surface of the aggregate existing in a saturated and surface-dry condition. The total water content of a moist aggregate is the sum of its moisture content and water absorption.
When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
421
01:25Deleterious Substances in Aggregate
536
Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
Another type of impurity is clay and fine material that...
Another type of impurity is clay and fine material that...
536
01:26Alkali Aggregate Reaction in Concrete
476
The alkali-aggregate reaction in concrete involves natural siliceous minerals in aggregates reacting with alkaline hydroxides derived from cement alkalis. This reaction forms an alkali-silica gel that absorbs water, swells, and increases in volume, which is confined by the surrounding cement paste, creating internal pressures that crack and disrupt the concrete. The extent of expansion and damage can be partly attributed to the alkali-silica reaction's osmotic hydraulic pressure and the...
476
02:23The Soil Ecosystem
24.5K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
24.5K
01:22Effect of Sea Water on Concrete
977
Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks,...
Concrete in areas between tide marks,...
977