期刊论文

Effects of ozone fumigation and depressed solar irradiance on soil microbial functional diversity in winter wheat rhizosphere

Zheng, Y.F.

中文

生态学报

Acta Ecologica Sinica

1000-0933

2015

35

12

3949-3958

10.5846/stxb201308052029

教育部高等学校博士学科点专项科研基金(20123228110003)； 国家自然科学基金(41075114)；

本校为其他机构

采用开顶箱(OTC)法和遮光网技术,设置100 nL/L臭氧熏气与3个辐射减弱梯度结合,模拟臭氧浓度升高和太阳辐射减弱的复合大气背景。用BIOLOG生态测试板,采用孔平均颜色变化率法(AWCD)测定冬小麦根际土壤微生物利用不同碳源的能力,计算微生物群落多样性指数,对不同碳源的利用率进行了主成分分析。两年试验结果显示,臭氧熏气与太阳辐射减弱复合作用,降低了土壤微生物对碳源的利用速度和利用总量;除了聚合物以外其它碳源利用率显著降低;对土壤微生物多样性没有直接的影响;对碳源降解的抑制效应大于增强的O_3与减弱的太阳辐射两因素各自的单独作用。太阳辐射减弱20%,—定程度上增加了对聚合物类的分解。...

Enhanced ozone concentration and depressed solar irradiation were simulated by using open-top chambers (OTCs) method and shading net techniques at 100 nL/L ozone fumigation assembling with three different levels of depressed solar irradiance. The effect of enhanced O3 combination with depressed solar irradiance was also studied. Two experiments were performed over two years. The combination of three OTCs with six shaded chambers was set up. Each OTC fed with 100 nL/L ozone. In the shaded chambers, solar irradiance was reduced to different level...