期刊论文

Liu, Q.

中文

环境科学学报

0253-2468

2014

34

9

2376-2383

10.13671/j.hjkxxb.2014.0621

Supported by the National Natural Science Foundation of China (No.31201688),the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (No.2012BAD151304),the China Postdoctoral Science Foundation Funded Project (No.2012M511374) and the Hunan Pr 湖南省科技厅一般项目 中国博士后科学基金项目 国家科技支撑计划项目 国家自然科学基金项目

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采集了种植过蕹菜(60d)的不同生物炭用量(0、2%、5%、10%干土重)的盆栽酸性菜地土,在60%土壤持水量和温度25℃培养条件下对土壤硝化作用进行了研究,并探讨了土壤硝化作用与土壤性质的关系.结果表明,通过Logistic修正模型(延滞期为0)拟合得出土壤NO_3~--N随时间的变化为"S"型增长,与不施氮肥(CK)和施氮肥(NB_0)处理相比,生物炭处理土壤NO_3~--N累积量较高,生物炭提高土壤最大硝化速率(K_(max))同时减少达到最大硝化速率所需时间(t_0)是其主要原因.K_(max)与土壤pH、氨氧化细菌数量、NO_3~--N、微生物生物量碳、氮,t_0与微生物生物量氮、氨氧化细菌数量,最大硝化潜势(N_p)与脲酶活性间显著相关.尽...

A laboratory soil incubation condition with moisture content 60% WHC and temperature 25℃ was applied to study the effect of biochar treatments (0, 2%, 5%, 10% dry soil weight) on nitrification with vegetable-planting acid soil collected from a pot experiment. The correlation between nitrification characteristics and soil properties were also studied. The results showed the type of “S” mode of time courses for NO3--N accumulation with no delay step with the modified logistic model. Soil NO3--N accumulation was higher with biochar treatments. ...