应用生态学报2015，Vol.26Issue(1)：25-31,7.
UV-B增强下施硅对水稻生长及CH4排放的影响
Effects of silicon supply on rice growth and methane emission from paddy soil under elevated UV-B radiation
摘要
Abstract
A pot experiment was conducted to investigate the effects of silicon supply on rice growth and methane (CH4) emission in paddy field under elevated UV-B radiation.The experiment was designed with two UV-B radiation levels,i.e.ambient UV-B (ambient,A) and elevated UV-B radiation (elevated by 20％,E) ; with four silicon supply levels,i.e.,Si0 (control,without silicon),Si1 (as sodium silicate,100 kg SiO2 · hm-2),Si2 (as sodium silicate,200 kg SiO2 · hm-2) and Si3 (as slag fertilizer,200 kg SiO2 · hm-2).The results indicated that,silicon supply obviously alleviated the depressive effect of elevated UV-B radiation on rice growth,and increased the tiller numbers,chlorophyll content,and shoot and root dry masses.Silicon supply promoted rice growth,which increased with the silicon supply level (sodium silicate).Slag fertilizer was better than sodium silicate in promoting rice growth.CH4 flux and accumulated CH4emission were obviously increased by elevated UV-B radiation,but significantly decreased by silicon application.CH4 emission was reduced with increasing the silicon supply level.Under the same silicon supply level,slag fertilizer was better than sodium silicate in inhibiting CH4 flux and accumulated CH4 emission.This research suggested that fertilizing slag in rice production was helpful not only in utilizing industrial wastes,but also in significantly mitigating CH4 emissions in rice paddy under elevated UV-B radiation.关键词
UV-B增强/硅肥/水稻/CH4排放/水稻土Key words
elevated UV-B radiation/ silicon fertilizer/ rice/ methane emission/ paddy soil分类
生物科学引用本文复制引用
孟艳,娄运生,吴蕾,崔合洋,王卫清..UV-B增强下施硅对水稻生长及CH4排放的影响[J].应用生态学报,2015,26(1):25-31,7.基金项目
国家自然科学基金项目(41375159)、江苏省自然科学基金项目(BK20131430)和江苏省“333高层次人才培养工程”项目资助. （41375159）
