| A study on physicochemical properties of biochar and biochar-based ammonium nitrate fertilizers |
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| DOI：10.7606/j.issn.1000-7601.2012.02.03 |
| Key Words: biochar ammonium nitrate biochar-based ammonium nitrate fertilizer physicochemical properties morphology water characteristics |
| Author Name | Affiliation | | GAO Haiying | College of Environment and Resources, Northwest A&F University, Yangling, Shaanxi 712100, China | | CHEN Xinxiang | College of Environment and Resources, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHANG Wen | College of Environment and Resources, Northwest A&F University, Yangling, Shaanxi 712100, China | | HE Xusheng | College of Environment and Resources, Northwest A&F University, Yangling, Shaanxi 712100, China | | GENG Zengchao | College of Environment and Resources, Northwest A&F University, Yangling, Shaanxi 712100, China | | SHE Diao | College of Environment and Resources, Northwest A&F University, Yangling, Shaanxi 712100, China | | GUO Yongli | Agricultural Technology Extension Center of Chang'an District, Xi'an, Shaanxi 710100, China |
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| Abstract: |
| The physicochemical properties, morphology and water-retaining characteristics of two biochar and biochar-based ammonium nitrate fertilizers were investigated through ultimate and ash analysis, environmental scanning electronic microscope (ESEM), infrared microscopy (IR) and water characteristic curve in order to promote application of biochar to fertilizer. The results indicate that the carbon content of the two biochars tested in this research is more than 60%, and the biochars have small amount of N, H, O. The bamboo charcoal has much more ash than that of wood charcoal, and the ammonium nitrate (AN)-loaded content of them are about 8% and 18% respectively. The micro-structure of biochar-based AN fertilizer exhibits amorphous and porous structure, and keeps morphology characteristics of original biochcar basically. Chemical reaction doesn't occur during the mixing of biochar with AN, and the AN-loaded to biochcar belongs to physical adsorption. The two biochars exhibit alkaline in pH, however, the pH of the AN-loaded biochar declines. The two biochars show some improvement for water-retaining capability of soils which depends on the application rate of biochar and soil texture. Bamboo charcoal and wood charcoal is also used as carrier for fertilizer nutrients. |
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