Evaluation of gas diffusivity models for no-tilled and tilled volcanic ash soils
Guo, LL; Nishimura, T; Imoto, H; Sun, ZG
2016
Source PublicationARCHIVES OF AGRONOMY AND SOIL SCIENCE
ISSN0365-0340
Volume62Issue:9Pages:1324-1335
AbstractAccurate quantification of soil gas diffusion is essential to understand the gas transport mechanism in soils, especially for soil greenhouse gas emissions. To date, the performance of soil gas diffusivity (D-p/D-0, where D-p is the soil gas diffusion coefficient and D-0 is the diffusion coefficient in free air) models has seldom been evaluated for no-tilled and tilled volcanic ash soils. In the present study, six commonly used models were evaluated for volcanic ash soils under two treatments by comparing the predicted and measured soil gas diffusivities at water potentials of pF 1.3-3. The Buckingham-Burdine-Campbell (BBC), soil-water-characteristic-dependent (SWC-dependent), and two-region extended Archie's Law (2EAL) models showed better performance for both no-tilled and tilled volcanic ash soils, which is likely because porosity and pore size parameters of bimodal soils were taken into consideration in these models. Since the BBC model showed better accuracy than the SWC-dependent and 2EAL models and required fewer, more easily measurable parameters, this study recommends the BBC model for predicting soil gas diffusivity of volcanic ash soil under different tillage managements. In future studies, the BBC model should be further tested at water potentials of pF>3, and may be improved by including the parameters of pore continuity and saturation.
SubtypeJournal
KeywordModel evaluation gas diffusivity model tillage management volcanic ash soil
Subject AreaAgriculture
WOS Subject ExtendedAgronomy ; Soil Science
WOS KeywordPORE-SIZE DISTRIBUTION ; WATER CHARACTERISTICS ; CARBON SEQUESTRATION ; UNDISTURBED SOIL ; AIR PERMEABILITY ; GRADIENT-METHOD ; POROUS-MEDIA ; COEFFICIENT ; PASTURE ; TILLAGE
Indexed BySCI
Language英语
WOS IDWOS:000379038400011
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44194
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Guo, LL,Nishimura, T,Imoto, H,et al. Evaluation of gas diffusivity models for no-tilled and tilled volcanic ash soils[J]. ARCHIVES OF AGRONOMY AND SOIL SCIENCE,2016,62(9):1324-1335.
APA Guo, LL,Nishimura, T,Imoto, H,&Sun, ZG.(2016).Evaluation of gas diffusivity models for no-tilled and tilled volcanic ash soils.ARCHIVES OF AGRONOMY AND SOIL SCIENCE,62(9),1324-1335.
MLA Guo, LL,et al."Evaluation of gas diffusivity models for no-tilled and tilled volcanic ash soils".ARCHIVES OF AGRONOMY AND SOIL SCIENCE 62.9(2016):1324-1335.
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