Effects of atmosphere deposition on nitrogen content of two poaceae plants | 湿沉降氮对2种禾本科植物中氮含量的影响
2009
Lin Fei, Dalian Jiaotong University, Dalian (China), School of Environmental and Chemical Engineering | Shi Kun, Dalian Jiaotong University, Dalian (China), School of Environmental and Chemical Engineering
[Objective] It was to study nitrogen use efficiency under the condition of deposition of perennial ryegrass (Lolium perenne L.) and barley (Hordeum vulgare L.), further revealing the difference in gene variation. [Method] A pot experiment was conducted under 3 treatments of rainwater, ammonium-N (aN) and nitrate-N (nN). [Result] In the treatments of aN and nN, the biomass and N contents in plants were obviously higher than those in rainwater treatment, while the largest biomass(36.116 g) was observed in nN treatment. The absorption to aN was best to perennial ryegrass while nN to barley. According to the differential analysis of N content, treatments of both aN and nN was nitrogen superfluous, which led to release excessive N to the atmosphere, and the rainwater treatment and the control were N deficient, the largest N absorption from atmosphere was 0.698 g in rainwater treatment. [Conclusion] Average N use efficiency contributed by atmosphere N deposition ranged from 1.321%―6.116%, while the control of barley had the highest of 6.116%.
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