Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (3): 525-532.DOI: 10.1016/S2095-3119(13)60708-X

• 论文 • 上一篇    下一篇

Crop Yield and Soil Properties in the First 3 Years After Biochar Application to a Calcareous Soil

 LIANG Feng, LI Gui-tong, LIN Qi-mei , ZHAO Xiao-rong   

  1. College of Resources and Environment, China Agricultural University, Beijing 100193, P.R.China
  • 收稿日期:2013-10-09 出版日期:2014-03-01 发布日期:2014-03-12
  • 通讯作者: LI Gui-tong, Tel: +86-10-62732963, E-mail: lgtong@cau.edu.cn
  • 作者简介:LIANG Feng, Mobile: 13426473866, E-mail: llangfeng1@126.com
  • 基金资助:

    The work was financially supported by the National Natural Science Foundation of China (41171211).

Crop Yield and Soil Properties in the First 3 Years After Biochar Application to a Calcareous Soil

 LIANG Feng, LI Gui-tong, LIN Qi-mei , ZHAO Xiao-rong   

  1. College of Resources and Environment, China Agricultural University, Beijing 100193, P.R.China
  • Received:2013-10-09 Online:2014-03-01 Published:2014-03-12
  • Contact: LI Gui-tong, Tel: +86-10-62732963, E-mail: lgtong@cau.edu.cn
  • About author:LIANG Feng, Mobile: 13426473866, E-mail: llangfeng1@126.com
  • Supported by:

    The work was financially supported by the National Natural Science Foundation of China (41171211).

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摘要： It remains unclear whether biochar applications to calcareous soils can improve soil fertility and crop yield. A long-term field experiment was established in 2009 so as to determine the effect of biochar on crop yield and soil properties in a calcareous soil. Five treatments were: 1) straw incorporation; 2) straw incorporation with inorganic fertilizer; 3), 4) and 5) straw incorporation with inorganic fertilizer, and biochar at 30, 60, and 90 t ha-1, respectively. The annual yield of either winter wheat or summer maize was not increased significantly following biochar application, whereas the cumulative yield over the first 4 growing seasons was significantly increased. Soil pH, measured in situ, was increased by a maximum of 0.35 units after 2 yr following biochar application. After 3 yr, soil bulk density significantly decreased while soil water holding capacity increased with adding biochar of 90 t ha-1. Alkaline hydrolysable N decreased but exchangeable K increased due to biochar addition. Olsen-P did not change compared to the treatment without biochar. The results suggested that biochar could be used in calcareous soils without yield loss or significant impacts on nutrient availability.

关键词: biochar , calcareous soil , crop yield , soil pH , long-term effect

Abstract: It remains unclear whether biochar applications to calcareous soils can improve soil fertility and crop yield. A long-term field experiment was established in 2009 so as to determine the effect of biochar on crop yield and soil properties in a calcareous soil. Five treatments were: 1) straw incorporation; 2) straw incorporation with inorganic fertilizer; 3), 4) and 5) straw incorporation with inorganic fertilizer, and biochar at 30, 60, and 90 t ha-1, respectively. The annual yield of either winter wheat or summer maize was not increased significantly following biochar application, whereas the cumulative yield over the first 4 growing seasons was significantly increased. Soil pH, measured in situ, was increased by a maximum of 0.35 units after 2 yr following biochar application. After 3 yr, soil bulk density significantly decreased while soil water holding capacity increased with adding biochar of 90 t ha-1. Alkaline hydrolysable N decreased but exchangeable K increased due to biochar addition. Olsen-P did not change compared to the treatment without biochar. The results suggested that biochar could be used in calcareous soils without yield loss or significant impacts on nutrient availability.

Key words: biochar , calcareous soil , crop yield , soil pH , long-term effect