Effect of Biochar on Soil Temperature under High Soil Surface Temperature in Coal Mined Arid and Semiarid Regions
| Autor: | Jibing Xiong, Muhammad Irfan Sohail, Fuhai Zhu, Ejazul Islam, Jianfeng Zha, Runhua Yu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Crop residue
010504 meteorology & atmospheric sciences Geography Planning and Development lcsh:TJ807-830 lcsh:Renewable energy sources Environmental pollution Management Monitoring Policy and Law 01 natural sciences complex mixtures Animal science Soil thermal properties Biochar biochar Water content lcsh:Environmental sciences soil productivity 0105 earth and related environmental sciences lcsh:GE1-350 Moisture Renewable Energy Sustainability and the Environment Chemistry lcsh:Environmental effects of industries and plants fungi food and beverages high soil temperature 04 agricultural and veterinary sciences Soil quality Bulk density humanities arid and semiarid regions lcsh:TD194-195 040103 agronomy & agriculture 0401 agriculture forestry and fisheries geographic locations coal mining |
| Zdroj: | Sustainability Volume 12 Issue 19 Sustainability, Vol 12, Iss 8238, p 8238 (2020) |
| ISSN: | 2071-1050 |
| DOI: | 10.3390/su12198238 |
| Popis: | High soil surface temperature and loosened soil are major limiting factors of plant productivity in arid and semi-arid coal mining areas of China. Moreover, the extensive and illegitimate burning of crop residues is causing environmental pollution whereas, these residues could be converted to biochar to benefit soil quality. In this study, the effect of wheat straw biochar (WSB) at rates of 0% (control, CK), 1% (low, LB), 2% (medium, MB) and 4% (high, HB) on soil temperature at different depths (5, 10, 15, and 20 cm) and moisture levels (10 and 20%) was investigated under high soil surface temperature of 50 ° C and air humidity of 40%. Our data suggested that soil bulk density was inversely, and soil moisture was directly corelated with soil thermal parameters. Moreover, the increasing rate of WSB addition linearly decreased the soil thermal properties. The maximum decrease in soil bulk density at both moisture levels (10% and 20%) was measured in HB treatment compared to respective CKs. The highest decrease in soil thermal conductivity (59.8% and 24.7%) was found under HB treatment in comparison to respective controls (CK10% and CK20% moisture). The soil volumetric heat capacity was also strongly corelated with soil moisture content (r = 0.91). The WSB treatments displayed differential responses to soil temperature. Under 10% soil moisture, temperature of LB, MB and HB treatments was higher as compared to CK at 5&ndash 20 cm depth, and MB treated soil had the smallest increase in temperature. At the 15-cm depth, the MB treatment decreased the temperature by 0.93 ° C as compared to the CK20%. Therefore, the effect of WSB on soil temperature was influenced by soil moisture content, soil depth and WSB application rates. It suggested that MB treatment could be a useful farming practice for mitigating soil temperature fluctuation. |
| Databáze: | OpenAIRE |
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