| This article has been：Browse 1879Times Download 1914Times |
|
|
|
| DOI： |
|
| Effect of Biochar on Nitrogen Leaching in a Sandy Loam Soil |
|
WANG Fan, QU Zhongyi, LI Changjian, JIA Bin, SUN Guanfang
|
|
Water Conservancy and Civil Engineering College, Inner Mongolia Agricultura University, Hohhot 010018, China; College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
|
| Abstract: |
| Column experiments were conducted in laboratory in attempts to study the effect of biochar on pH, EC and leaching of nitrogenin a sandy-loam soil. Five biochar application rates were examined: 0%(CK), 1%(T1), 2%(T2), 4%(T3) and 6%(T4). The results showed that pH and electrical conductivity of the soil increased as the applied biochar increased,with electrical conductivity of soil under T1—T4 treatments increasing by 2.79%, 10.88%, 11.3% and 12.50% respectively, compared with the CK. The concentration of leached nitrogen and the accumulated leached nitrogen decreased as the applied biochar increased, with the mass of the leached nitrogen in the T1—T4 treatments reducing by 1.74%, 13.35%, 14.01% and 17.31%, respectively, compared with the CK. In summary, biochar alerted the physical and chemical properties of soil, thereby reducing nitrogen leachingand hence the risk of groundwater pollution by non-point contaminant sources in agroecosystems. |
| Key words: biochar; sandy-loam soil; nitrogen leaching; adsorption effect |
|
|
