【作者】 刘红江； 杨连新； 黄建晔； 董桂春； 朱建国； 刘钢； 王余龙；

【Author】 LIU Hong-Jiang~1 YANG Lian-Xin~1 HUANG Jian-Ye~1 DONG Gui-Chun~1 ZHU Jian-Guo~2 LIU Gang~2 WANG Yu-Long~(1*) (~1Key Lab of Crop Cultivation & Physiology,Jiangsu Province,Yangzhou University,Yangzhou 225009;~2State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China)

【机构】 扬州大学江苏省作物遗传生理重点实验室； 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室；

【摘要】 2004—2006年利用我国唯一的农田开放式空气 CO₂浓度增高（FACE）研究平台, 以三系杂交籼稻汕优63为供试材料,设计比大气 CO₂浓度(对照,370 μmol·mol^-1)高200 μmol·mol^-1的 FACE 处理(570μmol·mol^-1)和施 N 量为125 kg·hm^-2（LN）、250 kg·hm^-2（NN） 处理,研究其对汕优63产量形成的影响。结果表明：（1）FACE 处理使汕优63成熟期株高比对照提高6．7%,达极显著水平：FACE 处理对汕优63全生育期日数无显著影响；（2）FACE 处理使汕优63产量平均比对照增加34．1%,其中2004、2005、2006年分别增加42．4%、27．3%和 31．2%,均达极显著水平；CO₂×年度的互作效应对产量的影响达显著水平；（3）FACE 处理使汕优63单位面积穗数、每穗颖花数、单位面积颖花量、结实率和千粒重平均比对照增加10．3%、 10．3%、21．7%、4．9%和4．3%,均达显著或极显著水平；（4）N 处理对汕优63产量和产量构成因素的影响均未达显著水平,但 N×年度对单位面积的穗数、颖花量以及产量均有显著互作效应。更多还原

【Abstract】 In this study,the Chinese unique Free Air CO₂ Enrichment [FACE,200 μmol·mol^-1 higher than ambient （AMB）] research platform was used to investigate the effects of FACE on grain yield formation of three-line indica hybrid rice cultivar Shanyou 63 under two levels of N:Low (LN, 125 kg·hm^-2) and normal N (NN,250 kg·hm^-2) in 2004-2006.Main results showed that:（1） Compared to ambient [CO₂],FACE increased plant height at maturity of Shanyou 63 by 6.7% on average,the effect reaching significant level （P＜0.01）,however,no CO₂ effect was observed on the whole growth duration of Shanyou 63.（2） On average,FACE increased the grain yield of Shanyou 63 significantly （P＜0.01）,with an average increase of 34.8% across the three years （42.4%、27.3% and 31.2% in 2001,2002 and 2003,respectively）.The year effect and the interaction between [CO₂]× year were significant （P＜0.05 or P＜0.01） for grain yield;（3） FACE increased yield components of Shanyou 63 significantly （P＜0.05 or P＜0.01）,averaging 10.3%,10.3%,21.7%,4.9% and 4.3% for panicle number per unit area,spikelet number per panicle,spikelet number per unit area,filled grain percentage and 1000-grain weight,respectively.（4） N effect was not significant on yield and its components of Shanyou 63,while its interaction with [CO₂] was significant for panicle number, spikelet number and grain yield per unit area.更多还原