Microbial control of nitrate concentrations in an agricultural soil treated with dairy waste compost or ammonium fertilizer
Microbial control of nitrate concentrations in an agricultural soil treated with dairy waste compost or ammonium fertilizer
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DOI：
10.1016/s0038-0717(00)00050-x
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发表时间：
2000-09
影响因子：
9.7
通讯作者：
W. Shi;J. Norton
中科院分区：
文献类型：
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作者：
W. Shi;J. Norton
我们进行了一个为期112天的实验室培养的农业土壤与乳制品废物堆肥或硫酸铵（（NH 4）2SO 4）处理，以检查微生物的生产和消费的NO-3在控制土壤NO-3浓度的作用。在不同时间段测量了处理土壤中的无机氮、净氮加工速率、硝化势和总氮加工速率。微生物对NO-3的消耗不是控制土壤NO-3浓度的重要过程。硝化细菌种群的瞬时增长，观察到硫酸铵，但没有堆肥添加。硝化速率与总氮矿化速率显著相关，约占总氮矿化速率的50%，表明硝化细菌对土壤NH+4的竞争能力并不弱于异养菌。
We conducted a 112-day laboratory incubation of an agricultural soil treated with dairy-waste compost or ammonium sulfate ((NH4)2SO4) to examine the role of microbial production and consumption of NO−3in controlling soil NO−3concentrations. Inorganic N, net N process rates, nitrification potentials and gross N process rates were measured at various time periods in the treated soils. Microbial consumption of NO−3was not an important process in controlling soil NO−3concentrations in these soil systems. Transient growth in the nitrifier population was observed with ammonium sulfate but not compost addition. Nitrification rates were significantly correlated with and comprised about 50% of the gross N mineralization rates, suggesting that nitrifying bacteria were not weaker competitors for soil NH+4than heterotrophs in these systems.