FACTORS CONTROLLING KEY NITROGEN FLUXES IN GRASSLAND ECOSYSTEMS: CASE STUDIES - SOUTHERN ROMANIA

被引：4

作者：

Postolache, Carmen ^{[1
]}

Botez, Florina ^{[1
]}

机构：

[1] Univ Bucharest, Dept Syst Ecol & Sustainabil, Bucharest 050095, Romania

来源：

ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL | 2014年 / 13卷 / 09期

关键词：

grassland; microbial processes; mineralization; nitrogen fertilization; nitrogen fluxes; AMMONIA EMISSIONS; SOIL; DEPOSITION; MINERALIZATION; NITRATE; PLANTS; EUTROPHICATION; NITRIFICATION; FERTILIZATION; ACIDIFICATION;

D O I：

10.30638/eemj.2014.245

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Enhanced nitrogen inputs to both terrestrial and aquatic ecosystems affects biodiversity at all its levels. Grasslands provide a complex range of functions, due to their wide representation throughout terrestrial ecosystems. Numerous studies demonstrate soil acidification, eutrophication and species richness reduction as a result of elevated reactive nitrogen availability. The present study aims to assess soil nitrogen stocks and transformations for two Romanian grasslands during November 2011 - November 2013, integrating the microbial population dynamics of two important functional groups involved in terrestrial nitrogen cycle: ammonifiers and denitrifiers. Our research focused on pristine systems, as well as on an experiment that simulated high nitrogen inputs of 100 kg N/ha/year (during 2012 and 2013) for one of the two selected study areas.

引用

页码：2201 / 2210

页数：10

共 55 条

[1] Gross N transformation rates and net N mineralisation rates related to the C and N contents of soil organic matter fractions in grassland soils of different age [J].