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Position: Home > Articles > Improvement to Maize Growth Caused by Biochars Derived From Six Feedstocks Prepared at Three Different Temperatures Journal of Integrative Agriculture 2014,13 (3)

Improvement to Maize Growth Caused by Biochars Derived From Six Feedstocks Prepared at Three Different Temperatures

作  者:
Luo Yu;Jiao Yu-jie;Zhao Xiao-rong;Li Gui-tong;Zhao Li-xin;Meng Hai-bo
单  位:
Chinese Acad Agr Engn, Inst Energy & Environm Protect, Beijing 100125, Peoples R China;China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China;Chinese Acad Agr Engn, Key Lab Energy Resource Utilizat Agr Residue, Minist Agr, Beijing 100125, Peoples R China
关键词:
biochar;feedstock;temperature;maize;soil
摘  要:
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 degrees 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.

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