【作者】 吴文革； 习敏； 许有尊； 陈刚； 周永进； 张洪程； 戴其根； 马荣荣； 王晓燕； 杨飞； 吴晓鹏； 周陶竹； 叶为发； 胡润； 康启中；

【Author】 WU Wenge;XI Min;XU Youzun;CHEN Gang;ZHOU Yongjin;ZHANG Hongcheng;DAI Qigen;MA Rongrong;WANG Xiaoyan;YANG Fei;WU Xiaopeng;ZHOU Taozhu;YE Weifa;HU Run;KANG Qizhong;Inst of Rice Res,Anhui Acad of Agric Sci;Coll of Agric,Yangzhou Univ;Ningbo Acad of Agric Sci;Agric Tech Exten Cen of Wuwei Country in Anhui Prov;Baihu Farm Group of Hefei in Anhui Prov;Agric Tech Exten Cen of Guichi Dist in Chizhou City in Anhui Prov;

【机构】 安徽省农业科学院水稻研究所； 扬州大学农学院； 宁波市农业科学研究院； 无为县农业技术推广中心； 合肥市白湖农场集团； 池州市贵池区农业技术推广中心；

【摘要】 以籼粳杂交组合甬优1540为材料,对2个不同产量水平（高产与超高产）钵育机插水稻产量构成因子、群体茎蘖动态、干物质生产与积累特性等进行对比分析。结果表明:钵育机插方式下白湖、无为示范点产量分别为15.31、15.16 t·hm^-2,达超高产水平;贵池示范点产量为13.21 t·hm^-2,为高产水平。钵育机插杂交水稻的产量与有效穗数群体颖花量呈极显著正相关。要实现15.0 t·hm^-2以上产量,有效穗数需突破27 0.0×10⁴穗·hm^-2,群体颖花量达到8.1×10⁸朵·hm^-2以上。与高产群体相比,超高产群体移栽后分蘖早生快长,拔节期后群体茎蘖数消减缓慢,成穗率较高;生育中后期作物生长速率大,光合物质积累能力较强,库源比高。综合而言,在增加穗数的基础上通过增强生育中后期的物质生产能力争取大穗,提高群体颖花量是实现钵育机插杂交水稻高产的关键。更多还原

【Abstract】 To identify the characteristics of super high-yielding population and approaches to increasing grain yield of mechanically transplanted pot seedlings in hybrid rice vaviety Yongyou 1540,the yield and its components,dynamics of stems and tillers,accumulation of dry matter were investigated in three high-yield demonstration fields（over & 7 hm²） of Anhui Province in 2015.The results showed that the growth trend of stems and tillers grew immediately after mechanically transplanted,decreased slowly after jointing,stabilized at heading,and finally led to the higher ratio of productive tillers to total tillers.Moreover,high-yielding mechanically transplanted hybrid rice was characterized by great crop growth rate,strong photoassimilates accumulation in the middle and late growth stages as well as higher ratio of source to sink.The grain yield of mechanically transplanted pot seedlings in hybrid rice was significantly positively correlated with the panicle and spikelet number.For exceeding 15 t · hm^-2 yield level,the panicle number should be more than 2.7 ×10⁶ · hm^-2,and spikelet number should be over & 1 × 10⁸ · hm^-2.Our study indicated that the key approaches to increasing grain yield of mechanically transplanted pot seedlings in hybrid rice was mainly aimed to increase panicles couple with population spikelets by raising dry matter accumulation in the middle and late growth stage.更多还原