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《农业科学学报(英文版)》 2014-03
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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;College of Resources and Environment, China Agricultural University;  
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.
【Fund】: financially supported by the National Natural Science Foundation of China (41171211)
【CateGory Index】: S141.4
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
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