Analyzing the impacts of three types of biochar on soil carbon fractions and physiochemical properties in a corn-soybean rotation
| Autor: | Saroop S. Sandhu, Douglas D. Malo, Sharon K. Papiernik, David A.N. Ussiri, Thomas E. Schumacher, Sandeep Kumar, Rajesh Chintala |
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| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Nitrogen Health Toxicology and Mutagenesis 010501 environmental sciences 01 natural sciences Zea mays Soil Soil pH Biochar Environmental Chemistry Biomass 0105 earth and related environmental sciences Chemistry Soil organic matter Public Health Environmental and Occupational Health Soil classification Agriculture 04 agricultural and veterinary sciences General Medicine General Chemistry Soil carbon Hydrogen-Ion Concentration Soil type Pollution Carbon Agronomy Loam Charcoal Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Soybeans |
| Zdroj: | Chemosphere. 184 |
| ISSN: | 1879-1298 |
| Popis: | Biochar is a solid material obtained when biomass is thermochemically converted in an oxygen-limited environment. In most previous studies, the impacts of biochar on soil properties and organic carbon (C) were investigated under controlled conditions, mainly laboratory incubation or greenhouse studies. This 2-year field study was conducted to evaluate the influence of biochar on selected soil physical and chemical properties and carbon and nitrogen fractions for two selected soil types (clay loam and a sandy loam soil) under a corn (Zea mays L.)-soybean (Glycine max L.) rotation. The three plant based biochar materials used for this study were corn stover (CS), ponderosa pine (Pinus ponderosa Lawson and C. Lawson) wood residue (PW), and switchgrass (Panicum virgatum L.) (SG). Data showed that CS and SG significantly increased the pH of acidic soil at the eroded landscape position but produced no significant change in soil pH at the depositional landscape position. The effects of biochar treatments on cold water extractable C (WSC) and nitrogen (WSN) fractions for the 0–7.5 cm depth were depended on biochar and soil type. Results suggested that alkaline biochars applied at 10 Mg ha−1 can increase the pH and WSC fraction of acidic sandy loam soil, but the 10 Mg ha−1 rate might be low to substantially improve physical properties and hot water extractable C and N fractions of soil. Application of higher rates of biochar and long-term monitoring is needed to quantify the benefits of biochar under field conditions on soils in different environmental conditions. |
| Databáze: | OpenAIRE |
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