%0 Journal Article
%T Effects of elevated ozone on growth and yield of field-grown rice in Yangtze River Delta, China
%A CHEN Zhan
%A WANG Xiaoke
%A FENG Zhaozhong
%A ZHENG Feixiang
%A DUAN Xiaonan
%A YANG Wenrui
%A <br>CHEN Zhan
%A WANG Xiaoke
%A FENG Zhaozhong
%A ZHENG Feixiang
%A DUAN Xiaonan
%A YANG Wenrui
%J 环境科学学报(英文版)
%D 2008
%I 
%X With rapid industrialization and urbanization in the Yangtze Delta,China,the tropospheric ozone concentration has increased to levels that induce orop yield loss.Rice,a widely grown crop in China,was investigated in field-established,open-top chambers.Four treatments were used:charcoal-filtered air (CF),non-charcoal-filtered air (NF),and charcoal-filtered air with two levels of additional ozone (O3-1 and O3-2).The AOT40s (accumulated hourly mean ozone concentration above 40 ppbv) were 0,0.91,23.24,and 39.28 ppmv.h for treatraent of CF,NF,O3-1,and O3-2,respectively.The rice height and biomass were reduced in the elevated ozone concentration.Less organic matter partitioning to roots under the elevated ozone significantly decreased rice root activity.The yield loss was 14.3% and 20.2% under O3-1 and O3-2 exposure,respectively.This was largely caused by a reduction in grain weight per panicle.
%K ozone
%K rice
%K growth
%K yield
%K Yangtze Delta<br>臭氧
%K 长江三角洲
%K 稻米
%K 生长因素
%K 收成率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=E65B184E6E92E8C91B584F31111B3655&yid=67289AFF6305E306&vid=A04140E723CB732E&iid=38B194292C032A66&sid=CA9ED1AB4D9E3E04&eid=86C0C9A759FDA8CA&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=32