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| Effects of Different Biochar-based Nitrogen Fertilizers on Nitrogen Accumulation and Biological Activities in Soil-Winter Wheat System |
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| KeyWord:biochar-based nitrogen fertilizer; available nitrogen; nitrate reductase; nitrite reductase; urease; microbial biomass carbon； microbial biomass nitrogen |
| Author Name | Affiliation | | ZHANG Wen | College of Nature Resources and Environment, Northwest A&F University, Ministry of Agriculture Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Yangling 712100, Shaanxi, China | | HE Xu-sheng | College of Nature Resources and Environment, Northwest A&F University, Ministry of Agriculture Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Yangling 712100, Shaanxi, China | | GENG Zeng-chao | College of Nature Resources and Environment, Northwest A&F University, Ministry of Agriculture Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Yangling 712100, Shaanxi, China | | YIN Xiao-han | College of Nature Resources and Environment, Northwest A&F University, Ministry of Agriculture Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Yangling 712100, Shaanxi, China | | WANG Qiu-ming | College of Nature Resources and Environment, Northwest A&F University, Ministry of Agriculture Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Yangling 712100, Shaanxi, China | | SUN Yi-ping | College of Nature Resources and Environment, Northwest A&F University, Ministry of Agriculture Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Yangling 712100, Shaanxi, China |
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| Abstract: |
| Due to its large surface area and rich functional groups, biochar has been used as a carrier for slow-release fertilizers. In this study, the effects of three biochar-based nitrogen fertilizers（BNF） on nitrogen accumulation and biological activities in soil and winter wheat system were evaluated. The experiment treatments were：CK（0 nitrogen fertilizer and 0 biochar）, ammonium nitrate only（AN）, biochar only（BC）, ammonium nitrate-biochar blending BNF（CH）, ammonium nitrate adsorbed on biochar BNF（XF） and ammonium nitrate reacted with biochar BNF（FY）. Ammonium accumulation in soil was significantly affected by BNFs, especially XF and FY. During winter wheat growth, the average contents of NH+4-N was higher in soils receiving XF and FY than in the control treatment. However, total nitrogen, nitrate and nitrite did not show treatment effects. Compared to CK, three BNFs significantly increased nitrogen accumulation in wheat aboveground parts, but had no influence on nitrogen utilization efficiency of wheat. Applying BNFs increased soil microbial biomass nitrogen and nitrate reductase activity, but did not affect soil microbial biomass carbon and nitrite reductase and urease activities. Further studies are necessary on agronomic and biological effects of biochar-based nitrogen fertilizers. |
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