作为植物生长介质的生物炭混合物中的氧气扩散:实验与建模

IF 3.7 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Waste Management & Research Pub Date : 2024-12-01 Epub Date: 2024-01-13 DOI:10.1177/0734242X231219631
Golnoosh Banitalebi, Mohammad Reza Mosaddeghi, Hossein Shariatmadari
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引用次数: 0

摘要

每年都会产生大量的农业废弃物。生产生物炭是废物管理、资源回收、减排、能源生产、减少运输和加强碳固存的极佳解决方案。本研究旨在调查生物炭生长介质与椰糠-珍珠岩商业无土栽培介质的通气状况。通过在 300 (B300) 和 500 (B500)°C 温度下以 2°C min-1 的速度并使用持续流入的氮气进行缓慢热解,从烘干的残留物中生产出生物炭。锯末 (Sd)、麦秆 (WS)、稻壳 (Rh)、棕榈穗 (Plm) 和甘蔗渣 (SC)、它们的生物炭、蛭石 (V) 和沸石 (Z) 被用来制备 13 种混合生长介质。在 -5、-10、-15、-20、-40 和 -60 hPa 六种母势 (h) 下测量了培养基的氧扩散系数 (Dp)。Troeh 等人(1982 年)根据 Dp/D0 与充气孔隙度 (AFP) 数据建立了模型。虽然某些介质的 AFP 超过 0.1 立方米/立方米,但 Dp/D0 却很低。考虑到生长基质在 h = -8 hPa 时的最佳 Dp/D0(即 0.010-0.015),四种培养基(cocopeat-perlite、Rh-SCB300-Z、Sd-SCB300-Z 和 WSB500-Rh-V)的通气状态最佳。Rh-SCB300-Z 在 h = -8 hPa 时的 Dp/D0 最高。在 h = -10 hPa 时,Rh-SCB300-Z、cocopeat-perlite 和 WSB500-Rh-V 的 AFP 最高。以生物炭为基础的培养基具有良好的通气性和保水性能,可在温室生产中替代商业无土栽培。总之,WSB500-Rh-V 是椰糠-珍珠岩的合适替代品。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Oxygen diffusion in biochar-based mixtures as plant growth media: Experimental and modelling.

A large amount of agricultural waste is produced annually. Producing biochar is an excellent solution for waste management, resource recovery, emission reduction, energy production, reduction in transportation and enhancing carbon sequestration. This study was done to investigate the aeration status of biochar-based growth media as compared with the commercial soilless medium of cocopeat-perlite. Biochars from oven-dried residues were produced by slow pyrolysis at 300 (B300) and 500°C (B500) with a rate of 2°C min-1 and using a continuous inflow of nitrogen. Sawdust (Sd), wheat straw (WS), rice hull (Rh), palm bunches (Plm) and sugarcane bagasse (SC), their biochars, vermiculite (V) and zeolite (Z) were used to prepare 13 mixed growth media. Oxygen diffusion coefficient (Dp) of media was measured at six matric potentials (h) of -5, -10, -15, -20, -40 and -60 hPa. Troeh et al. (1982) model was fitted to Dp/D0 versus air-filled porosity (AFP) data. Although AFP was more than 0.1 m3 m-3 for some media, the Dp/D0 was very low. Considering optimum Dp/D0 (i.e. 0.010-0.015) for growth substrates at h = -8 hPa, aeration status of four media (cocopeat-perlite, Rh-SCB300-Z, Sd-SCB300-Z and WSB500-Rh-V) was optimum. Highest Dp/D0 at h = -8 hPa was observed for Rh-SCB300-Z. The AFP at h = -10 hPa was highest for Rh-SCB300-Z, cocopeat-perlite and WSB500-Rh-V. Biochar-based media with good aeration status and water retention can be a suitable substitute for commercial soilless culture in greenhouse production. Overall, WSB500-Rh-V is a suitable substitute for cocopeat-perlite.

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来源期刊
Waste Management & Research
Waste Management & Research 环境科学-工程:环境
CiteScore
8.50
自引率
7.70%
发文量
232
审稿时长
4.1 months
期刊介绍: Waste Management & Research (WM&R) publishes peer-reviewed articles relating to both the theory and practice of waste management and research. Published on behalf of the International Solid Waste Association (ISWA) topics include: wastes (focus on solids), processes and technologies, management systems and tools, and policy and regulatory frameworks, sustainable waste management designs, operations, policies or practices.
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