Wei Yan1; Wang Zhongqiang1; Zhang Xinyu2; Yang Hao1; Liu Xiyu1; Liu Wenjing1
Source Publicationjournalofresourcesandecology
AbstractA laboratory incubation experiment was established to examine the impacts of nitrate and ammonium nitrogen additions on soil microbial attributes of a subtropical Pinus elliottii forest ecosystem in southern China. Soils were subjected to three different treatments: the control with no nitrogen addition (CK), the ammonium nitrogen addition (NH_4~+ -N), and the nitrate nitrogen addition (NO_3~- -N). Samples from bulk and two different size fractions (macroaggregate (>250 μm) and microaggregate (53–250 μm)) were analyzed for soil properties, enzyme activities and microbial communities on day 7 and 15 of the incubation. Our study demonstrated that NH_4~+ -N had a greater influence on soil microbial activities than NO_3~- -N. NH_4~+ -N additions resulted in significant increases in β~(-1),4-glucosidase (βG) and β~(-1),4-N-acetyl glucosaminidase (NAG) enzyme activities in bulk, macroaggregate and microaggregate soils after 7 and 15 days incubation. NO_3~- -N additions only significantly increased in βG and NAG enzyme activities in bulk, macroaggregate soils after 7 and 15 days incubation, but not in microaggregate. All NH_4~+ -N and NO_3~- -N additions resulted in significant increases in gram-positive bacterial PLFAs in microaggregates. Only a significant correlation between soil nutrient contents and enzyme activities in macroaggregates was founded, which suggests that the soil aggregation structure played an important role in the determining enzyme activities.
Document Type期刊论文
Recommended Citation
GB/T 7714
Wei Yan,Wang Zhongqiang,Zhang Xinyu,et al. enzymeactivitiesandmicrobialcommunitiesinsubtropicalforestsoilaggregatestoammoniumandnitratenitrogenadditions[J]. journalofresourcesandecology,2017,8(3):258.
APA Wei Yan,Wang Zhongqiang,Zhang Xinyu,Yang Hao,Liu Xiyu,&Liu Wenjing.(2017).enzymeactivitiesandmicrobialcommunitiesinsubtropicalforestsoilaggregatestoammoniumandnitratenitrogenadditions.journalofresourcesandecology,8(3),258.
MLA Wei Yan,et al."enzymeactivitiesandmicrobialcommunitiesinsubtropicalforestsoilaggregatestoammoniumandnitratenitrogenadditions".journalofresourcesandecology 8.3(2017):258.
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