Improvement to Maize Growth Caused by Biochars Derived From Six Feedstocks Prepared at Three Different Temperatures
| Autor: | Gui-tong Li, Luo Yu, Hai-bo Meng, Yu-jie Jiao, Li-xin Zhao, Xiao-rong Zhao |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Agriculture (General)
Plant Science maize Biochemistry soil S1-972 Animal science Food Animals Soil pH Biochar biochar Charcoal feedstock Ecology Chemistry temperature Straw Soil conditioner Agronomy visual_art Soil water visual_art.visual_art_medium Animal Science and Zoology Agronomy and Crop Science Calcareous Pyrolysis Food Science |
| Zdroj: | Journal of Integrative Agriculture, Vol 13, Iss 3, Pp 533-540 (2014) |
| ISSN: | 2095-3119 |
| Popis: | Biochar is increasingly proposed as a soil amendment, with reports of benefits to soil physical, chemical and biological properties. In this study, different biochars were produced from 6 feedstocks, including straw and poultry manure, at 3 pyrolysis temperatures (200, 300 and 500°C) and then added separately to a calcareous soil. Their effects on soil properties and maize growth were evaluated in a pot experiment. The biochars derived from crop straw had much higher C but smaller N concentrations than those derived from poultry manure. Carbon concentrations, pH and EC values increased with increasing pyrolysis temperature. Biochar addition resulted in increases in mean maize dry matter of 12.73% and NPK concentrations of 30, 33 and 283%, respectively. Mean soil pH values were increased by 0.45 units. The biochar-amended soils had 44, 55, 254 and 537% more organic C, total N, Olsen-P and available K, respectively, than the control on average. Both feedstocks and pyrolysis temperature determined the characteristics of the biochar. Biochars with high mineral concentrations may act as mineral nutrient supplements. |
| Databáze: | OpenAIRE |
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