Chinese Journal of Agrometeorology ›› 2014, Vol. 35 ›› Issue (02): 156-161.doi: 10.3969/j.issn.1000-6362.2014.02.006

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Effects of Biochar on Soil Nutrients and Nitrogen Leaching in Anthropogenic Alluvial Soil

HUI Jinzhuo,ZHAGN Aiping,LIU Ruliang,WANG Yongsheng,CHEN Zhe,YANG Zhengli   

  1. 1Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Science/Key Laboratory of Agricultural Environment,Ministry of Agriculture,Beijing100081,China;2Institute of Agricultural Resources and Environment,Ningxia  Academy of Agroforestry Science,Yinchuan750002;3Institute of Geographical Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing100101
  • Received:2014-01-20 Online:2014-04-20 Published:2015-02-11

Abstract: Anthropogenic alluvial soil was the main species in Ningxia irrigation district The crude farming methods are used in the paddy planting,such as uncontrolled irrigation and excessive fertilization,leading to a high leaching of nitrate nitrogen to the surface water Soil column leaching method was used to study the effect of different amount of biochar application on nitrogen leaching and soil nutrient availability in anthropogenic alluvial soil The results showed that there was no significant difference in soil pH,the content of total salt and phosphorus between the biochar addition treatments and control but,the content of total soil nitrogen,available phosphorus,available kalium was significantly increased with the biochar application amount Applying biochar significantly reduced the concentration and leaching amount of nitrate nitrogen2% biochar addition reduced the nitrate nitrogen leaching by 49% when compared with the control The leaching peak of ammonium nitrogen was delayed with the increase of biochar addition. The significant decrease of ammonium nitrogen leaching (18%) was found only in the treatment of 10% biochar addition. However,the opposite trend was found in the other biochar addition,compared with the control Whether the species of biochar affect nitrogen leaching in anthropogenic alluvial soil needs to be further studied

Key words: Biochar, Anthropogenic alluvial soil, Soil Nutrients, Ammonium nitrogen, Nitrate nitrogen