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足迹在整个生物废物-生物-土壤-植物系统:保留,补充和接收

Hongyan Nan^1,2, Fan Yang³, Chongqing Wang¹

¹School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China.

Journal of agricultural and food chemistry

|December 18, 2023

概括

本研究引入了一种"三R"模型,用于追踪污水污泥 (SS) 和骨 (BD) 中的 (P) 生物炭. 生物炭有效地保留P,补充土壤营养物质,并增强植物的P接收,帮助营养物质的回收.

科学领域:

环境科学环境科学
土壤科学土壤科学
农业化学农业化学

背景情况:

(P) 是植物生长的关键营养素,在农业土壤中通常是有限的.
生物废物,如污水污泥 (SS) 和骨 (BD) 富含,但需要适当的管理,以避免环境问题.
来自生物废物的生物炭生产提供了P稳定和营养恢复的方法.

研究的目的:

研究来自污水污泥 (SSBC) 和骨 (BDBC) 的生物炭中的 (P) 转化和流动性.
评估生物炭修改土壤的P释放 (P补充) 和植物吸收 (P接收),使用一种新的"三R"概念模型.
评估SSBC和BDBC在不同类型的土壤中对P储备和营养回收的潜力.

主要方法:

解SS和BD以产生生物炭,分析P阶段和保留率.
化实验测量SSBC和BDBC中的P释放在酸红色,黄色和中性大米土壤中.
植物培养实验量化生物炭修改土壤的P吸收.

主要成果:

热解将不稳定的有机P转化为稳定的无机P,在生物炭中保持70-90%的P (P保留).
在酸性和性土壤中,SSBC释放的P比BDBC更多,而在中性土壤中,BDBC释放的P更多.
来自SSBC的P形成AlPO4,而来自BDBC的P在土壤中形成Ca-P化合物 (P补充).
与对照土壤相比,植物从生物炭修改土壤中吸收P的2-6倍 (P接收).

结论:

来自SS和BD的生物炭有效地固定和保留,促进营养物质的回收.
释放的动态因土壤的pH值而异,影响了补充潜力.
生物炭修正案显著提高了植物的吸收,证明了其在可持续农业中的价值.

关键词:

在 AlPO4 的情况下,它是 AlPO4 .5 () PO4 () 3F () 5 () 4 () 3F () 5 () 4 () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F () 3F ()的形态演变是的形态演变.红土是红色的土壤.污水泥和骨生物炭污水和骨生物炭.黄色的土壤是一种黄色的土壤.

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相关概念视频

The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.

Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.

What are Biogeochemical Cycles?

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.

The Soil Ecosystem

The Soil Ecosystem

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:

The Carbon Cycle

The Carbon Cycle

Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.