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首页> 外文会议>International Conference on Environment Science and Biotechnology >Effects of elevated CO2 and O3 and N fertilization on amount of soil microbial biomass carbon in spring wheat growing season
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Effects of elevated CO2 and O3 and N fertilization on amount of soil microbial biomass carbon in spring wheat growing season

机译：CO2和O3和N施肥升高对春小麦生长季节土壤微生物碳量的影响

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Experimental platform of Open-top chambers (OTC) was established in 2006 over a spring wheat system, it located at the National Field Observation and Research Station of Shenyang Agro-ecosystems, a member of Chinese Ecosystem Research Network (CERN) established in 1987. We compared the dynamics of soil microbial biomass C with high (225.0 kg N hm~(-2)) and low (150 kg N hm~(-2)) application rate of chemical fertilizer N exposed to the elevated CO2, O3, CO2 plus O3 and CK after the spring wheat growing season in 2010. The results showed that under elevated CO2 concentration at the jointing stage, high application rate of chemical fertilizer N significantly declined the amount of soil microbial biomass C by 64.97%, compared with the low N application rate of chemical fertilizer N (p<0.01). In treatment with low application rate of chemical fertilizer N, elevated O3 concentration significantly declined the amount of soil microbial biomass C by 52.49% (p<0.05), compared with CK. In treatment with high application rate of chemical fertilizer N, the interaction of CO2 and O3 increased significantly the amount of soil microbial biomass C by 50.03% (p<0.05), compared with CK. At the ripening stage, under elevated CO2 concentration and interaction of CO2 and O3, high application rate of chemical fertilizer N significantly decreased the amount of soil microbial biomass C by 32.92% and 41.45%, compared with low N application rate of chemical fertilizer N, respectively (p<0.05). In treatment with low application rate of chemical fertilizer N, elevated CO2 and interaction of CO2 and O3 significantly increased the amount of soil microbial biomass C by 25.32% and 38.59% (p<0.05), compared with CK, respectively.
机译：敞篷腔室（OTC）的实验平台于2006年在春小麦系统中成立，位于1987年建立的中国生态系统研究网络（CERN）的国家外地观察和研究站。我们将土壤微生物生物量C的动力学与高（225.0kg N〜（-2））和低（150kg N HM〜（-2））的化学肥液暴露于升高的CO2，O3，CO2加上O3和CK在2010年春小麦生长季节。结果表明，在连接阶段的升高的CO 2浓度下，化肥N的高施用速率明显下降了64.97％的土壤微生物生物量C的量，与低n化肥施用率N（P <0.01）。在化肥N的低施用速率下，升高的O 3浓度明显下降52.49％（P <0.05）的土壤微生物生物量C的量显着下降52.49％（P <0.05）。在化肥N的高施用率治疗中，与CK相比，CO2和O3的相互作用显着增加了50.03％（P <0.05）的土壤微生物生物量C的量。在成熟阶段，在升高的CO 2浓度和CO 2和O 3的相互作用下，化肥N的高施用速率明显降低了土壤微生物量C的量显着降低了32.92％和41.45％，与化肥N的低N施加率相比，分别（P <0.05）。在化肥N的低施用速率下，CK的升高的CO 2和CO 2和O 3的相互作用显着增加了25.32％和38.59％（P <0.05）的土壤微生物生物量C的量显着增加。

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