大气O3浓度升高对麦季土壤和植株氮磷钾的影响  

Effects of elevated atmospheric O_3 on N,P,and K concentrations in soil and wheat plant during wheat growth season

作　　者：张咸臣[1] 张海进[1] 尹微琴[1] 王小治[1,2] 董兵[1] 盛海君[1] 封克[1] 朱建国[1] 

机构地区：[1]江苏省扬州农业环境安全技术服务中心/扬州大学环境科学与工程学院,扬州225127 [2]土壤与农业可持续发展国家重点实验室,南京210008

出　　处：《生态学杂志》2011年第8期1637-1641,共5页Chinese Journal of Ecology

基　　金：扬州大学科技基金项目(2008CXJ015,2009CXJ016);江苏省“青蓝工程”;国家自然科学基金重大国际合作项目(40120140817)资助

摘　　要：以江都稻/麦轮作系统O3-FACE(ozone-free air concentration enrichment)为试验平台,研究了高浓度O3(比周围大气高50%)对麦季土壤和植株N、P、K含量的影响。结果表明:在小麦整个生长期,高浓度O3处理下,土壤NH4+-N、NO3--N和速效K含量分别降低了5.7%、3.6%和3.0%,土壤速效P含量提高了26.3%(P<0.05)。经高浓度O3处理后,小麦植株在拔节期体内K含量增加了28.4%(P<0.01);成熟期小麦植株各器官内N含量均降低,麦粒中P和K含量分别增加了6.5%和4.2%;指出大气O3浓度升高在整个小麦生长期内会促进小麦植株对N、K的吸收,同时提高小麦籽粒中K、P的含量,但降低了成熟期小麦植株N含量。Taking the rice/wheat ozone free-air concentration enrichment（O3-FACE） system in Jiangdu County of Jiangsu Province as a platform,this paper studied the effects of elevated atmospheric O3（target at 50% above ambient） on the N,P,and K concentrations in soil and wheat plant during wheat growth season.In the whole growth season of wheat,the concentrations of soil NH4＋-N,NO3--N,and available K under elevated O3 decreased by 5.7%,3.6% and 3.0%,respectively,while the soil available P concentration increased by 26.3%（P0.05）,compared with those under ambient O3.Under elevated O3,the K concentration in wheat plant at jointing stage increased by 28.4%（P0.01）,the plant N concentration at maturing stage decreased,while the P and K concentrations in wheat grain increased by 6.5% and 4.2%,respectively.Our results suggested that elevated atmospheric O3 could promote the N and K uptake by wheat plant in its whole growth period,increase the K and P concentrations in wheat grain,but decrease the N concentration in wheat plant at maturing stage.

关 键 词：O3浓度升高 有效态N、P、K 土壤 小麦植株 

分 类 号：S512.1[农业科学—作物学]