[1]WANG Daqing,MENG Ying,SUN Taipeng,et al.Effects of Biochar on Nitrogen Transformation and Mineral Nitrogen of Rhizosphere in Black Soil[J].Research of Soil and Water Conservation,2016,23(05):85-89,94.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 05
Page number:
85-89,94
Column:
Public date:
2016-10-28
- Title:
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Effects of Biochar on Nitrogen Transformation and Mineral Nitrogen of Rhizosphere in Black Soil
- Author(s):
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WANG Daqing1, MENG Ying2, SUN Taipeng2, ZHAO Wei2, WANG Hongyan2
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1. Heilongjiang Economic Research Institute of State Farms, Harbin 150030, China;
2. College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
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- Keywords:
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biochar; black soil; nitrogen transformation; mineral nitrogen
- CLC:
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S153.6;S156.2
- DOI:
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- Abstract:
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Pot experiments were conducted to study the effects of biochar on mineral nitrogen transformations and nitrogen of rhizosphere of soybean. The results showed that nitrogen-fixing capacities were the highest at the podding stage, and then fell gradually. Ammonifying capacities were significantly different in flowering, bearing and podding periods and ammonifying capacities of 5% biochar treatment were much higher than those of CK. Nitrifying capacities of N2Y5 and N1Y5 treatments were significantly different from CK at seedling, flowering and podding stages and nitrifying capacities of N2Y5 were 58.87%, 84.49% higher than those of CK at bearing and maturing period, respectively. NH4+-N contents of soybean rhizosphere were improved by use of biochar, and NH4+-N contents of different treatments were significantly different at seedling stage, flowering and podding and bearing stages, but not remarkably different at maturing stage. Reasonable applications of biochar might play a key role in NO3--N utilization, and NO3--N contents of 5% biochar treatment were much higher than those of CK at seedling, flowering, podding and bearing stage. NO3--N contents of N1Y5, N1Y10 and N2Y10 treatments were 20.73%, 21.04% and 22.85% lower than those of CK at maturing stage.