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Effect of biochar on soil physical properties in two contrasting soils: An Alfisol and an Andisol
Herath, H. M. S. K.; Camps-Arbestain, Marta; Hedley, Mike
2013
Source PublicationGEODERMA
ISSN0016-7061
Volume209Issue:xPages:188-197
AbstractImproving soil physical properties by means of biochar application has been proposed in recent publications. The objective of this study was to investigate to what extent the addition of corn stover (CS) and biochars produced from the pyrolysis of corn stover feedstock (CS) at 350 and 550 degrees C temperatures (CS-350, CS-550) affected aggregate stability, volumetric water content (theta(V)), bulk density, saturated hydraulic conductivity (Ks) and soil water repellency of specific soils. Organic amendments (CS, CS-350, CS-550) were incorporated into a Typic Fragiaqualf (TK) and a Typic Hapludand (EG) soils at the rate of 7.18 t C ha(-1), which corresponded to 17.3, 11.3 and 10.0 t biochar ha(-1) for the CS, CS-350 and CS-550 treatments, respectively. After 295 d of incubation (1295), soils were sampled as (i) undisturbed samples for bulk density and Ks; and (ii) mildly disturbed samples for theta(V) (at -15, -1, -0.3, -0.1, -0.08, -0.06, -0.04, and -0.02 bar), aggregate stability and soil water repellency. The theta(V) at time 0 (TO) was also determined at -15, -1 and -0.3 matric potentials for the different treatments. Biochar application significantly increased (P < 0.05) aggregate stability of both soils, the effect of CS-550 biochar being more prominent in the TK soil than that in the EG soil, and the reverse pattern being observed for the CS-350 biochar. Biochar application increased the By at each matric potential although the effect was not always significant (P < 0.05) and was generally more evident in the TK soil than that in the EG soil, at both T0 and T295. Biochar addition significantly (P < 0.05) increased the macroporosity (e.g., increase in theta(V) at -0.08 to 0 bar) in the TK soil and also the mesoporosity in the EG soil (e.g., increase in theta(V) from -1 to -0.1 bar). Both biochars significantly increased (P < 0.05) the Ks of the TIC soil, but only CS-350 biochar significantly increased (P < 0.05) the Ks in the EG soil. Biochar was not found to increase the water repellency of these soils. Overall results suggest that these biochars may facilitate drainage in the poorly drained TIC soil. However, the present results are biochar-, dose- and soil-specific. More research is needed to determine changes produced in other biochar, dose and soil combination, especially under field conditions. (C) 2013 Elsevier B.V. All rights reserved.
KeywordOrganic-matter Black Carbon Hydraulic Conductivity Chemical-properties Charcoal Production Water Repellency New-zealand No-tillage Management Turnover
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/9823
Collection文献共享
Recommended Citation
GB/T 7714
Herath, H. M. S. K.,Camps-Arbestain, Marta,Hedley, Mike. Effect of biochar on soil physical properties in two contrasting soils: An Alfisol and an Andisol[J]. GEODERMA,2013,209(x):188-197.
APA Herath, H. M. S. K.,Camps-Arbestain, Marta,&Hedley, Mike.(2013).Effect of biochar on soil physical properties in two contrasting soils: An Alfisol and an Andisol.GEODERMA,209(x),188-197.
MLA Herath, H. M. S. K.,et al."Effect of biochar on soil physical properties in two contrasting soils: An Alfisol and an Andisol".GEODERMA 209.x(2013):188-197.
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