期刊论文详细信息
Ecotoxicology and Environmental Safety
Biochar enhances the retention capacity of nitrogen fertilizer and affects the diversity of nitrifying functional microbial communities in karst soil of southwest China
Jiulan Gou1  Quanquan Wei2  Meng Zhang2  Yanling Liu2 
[1] Corresponding author.;Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou 550006, PR China;
关键词: Moutai lees biochar;    Yellow soil;    Nitrogen migration and distribution;    Nitrogen retention;    Microbial communities;   
DOI  :  
来源: DOAJ
【 摘 要 】

Biochar is usually used as an agricultural soil amendment to improve soil nutrition availability and soil microbial environment. However, the effects of Moutai lees biochar on the migration and retention characteristics of nitrogen fertilizer and the changes of nitrifying microorganisms on yellow soil of southwest China are still not distinct. In this study, the migration distribution characteristics of nitrogen fertilizer, nitrogen retention capacity and microbial community structure were evaluated by a soil column leaching simulated experiment. Five application rates of biochar: 0%(BC0), 0.5%(BC0.5), 1.0%(BC1.0), 2.0%(BC2.0) and 4.0%(BC4.0) were respectively tried. The results showed that the application of Moutai lees biochar has significantly increased the total nitrogen (TN) and nitrate (NN) contents in yellow soil, but it has also significantly decreased the microbial biomass nitrogen (MBN) content. When compared with the BC0 treatment, it was found that the application of biochar increased nitrogen fertilizer retention rate (NF) to 49.84%–95.23%. Moreover, high biochar application rates (2.0% and 4.0%) were also able to improve the NF ratio, while low biochar application rates (0.5% and 1.0%) still had the risk of nitrogen leaching losses. Additionally, the application of biochar changed the bacterial community structure and the relative abundance of nitrogen-related microorganisms in yellow soil. Also, it was determined that Nitrite-oxidizing bacteria (NOB) played a major factor in affecting soil nitrogen, instead of ammonia-oxidizing archaea (AOA) and ammonium-oxidizing bacteria (AOB). Overall, research finally concluded that Moutai lees biochar decreased nitrite oxidation effect and changed ammoxidation to affect nitrogen nutrients availability in yellow soil and the biochar application rate of 4% has increased nitrogen fertilizer retention rate and decreased the risk of nitrogen leaching losses in yellow soil.

【 授权许可】

Unknown   

  文献评价指标  
  下载次数:0次 浏览次数:4次