《Table 3 Content of nutrients in composting materials》

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《生物炭对鸡粪好氧堆肥基质降解的影响与氨气排放研究（英文）》

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Unequal biochar amounts were added to the same organic substrate for the aerobic fermentation test.After 40 d，the content of carbon and nitrogen in each corresponding product was measured.The final carbon-nitrogen ratio of every treatment group with biochar added was obviously less than that of the control group，and the difference was significant（P<0.05）；but in the nitrogen content of the composting products obtained，Treatment C was the highest，followed by Treatment B，Treatment D，and Control Group A，in the order（Table 3）；and this showed that biochar had good nitrogen retention，the ability of biochar to conserve nitrogen was closely linked to the biochar application amount under the consistent condition of other factors，and an addition of biochar at 20%had the best nitrogen conservation during the composting of chicken manure.