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פותח על ידי קלירמאש פתרונות בע"מ -
PH-dependent mineral release and surface properties of cornstraw biochar: Agronomic implications
Year:
2010
Authors :
גרבר, אלן
;
.
זילבר, אבנר
;
.
לבקוביץ', אירית
;
.
Volume :
44
Co-Authors:
Silber, A., Institute of Soils, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Levkovitch, I., Institute of Soils, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Graber, E.R., Institute of Soils, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Facilitators :
From page:
9318
To page:
9323
(
Total pages:
6
)
Abstract:
Surface charge and pH-dependent nutrient release properties of cornstraw biochar were examined to elucidate its potential agronomic benefits. Kinetics of element release was characterized by rapid H+ consumption and rapid, pH-dependent P, Ca, and Mg release, followed by zero-order H+ consumption and mineral dissolution reactions. Initial K release was not pH-dependent, nor was it followed by a zero-order reaction at any pH. Rapid and constant rate P releases were significant, having the potential to substitute substantial proportions of P fertilizer. K releases were also significant and may replace conventional K fertilizers, however, not long-term plant demand. The cation exchange capacity (CEC) of the biochar leached with a mild acidic solution increased linearly from 179 to 888 mmolc (kg C)-1 over a pH range of 4-8, while the anion exchange capacity of 154 mmol c (kg C)-1 was constant over the same pH range. Since native soil organic constituents have much higher CEC values (average 2800 mmolc (kg C)-1 at pH 7), improved soil fertility as a result of enhanced cation retention by the biochar probably will be favorable only in sandy and low organic matter soils, unless surface oxidation during aging significantly increases its CEC. © 2010 American Chemical Society.
Note:
Related Files :
Dissolution
Native soil
Nutrient release
Order reactions
Phosphorus
Reaction kinetics
Silicate minerals
Straw
עוד תגיות
תוכן קשור
More details
DOI :
10.1021/es101283d
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
19930
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:32
Scientific Publication
PH-dependent mineral release and surface properties of cornstraw biochar: Agronomic implications
44
Silber, A., Institute of Soils, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Levkovitch, I., Institute of Soils, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Graber, E.R., Institute of Soils, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
PH-dependent mineral release and surface properties of cornstraw biochar: Agronomic implications
Surface charge and pH-dependent nutrient release properties of cornstraw biochar were examined to elucidate its potential agronomic benefits. Kinetics of element release was characterized by rapid H+ consumption and rapid, pH-dependent P, Ca, and Mg release, followed by zero-order H+ consumption and mineral dissolution reactions. Initial K release was not pH-dependent, nor was it followed by a zero-order reaction at any pH. Rapid and constant rate P releases were significant, having the potential to substitute substantial proportions of P fertilizer. K releases were also significant and may replace conventional K fertilizers, however, not long-term plant demand. The cation exchange capacity (CEC) of the biochar leached with a mild acidic solution increased linearly from 179 to 888 mmolc (kg C)-1 over a pH range of 4-8, while the anion exchange capacity of 154 mmol c (kg C)-1 was constant over the same pH range. Since native soil organic constituents have much higher CEC values (average 2800 mmolc (kg C)-1 at pH 7), improved soil fertility as a result of enhanced cation retention by the biochar probably will be favorable only in sandy and low organic matter soils, unless surface oxidation during aging significantly increases its CEC. © 2010 American Chemical Society.
Scientific Publication
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