中国农业科学Issue(23)：4552-4564,13.DOI:10.3864/j.issn.0578-1752.2014.23.004
双季稻区晚稻“籼改粳”品种筛选
Selection of Late Rice Cultivars of Japonica Rice Switched from Indica Rice in Double Cropping Rice Area
摘要
Abstract
[Objective]Under the conditions of late rice of double cropping systems, three different types of rice cultivars were used to investigate the differences and interrelations of yield, growth and utilization of temperature and illumination. The result will provide a scientific basis and technical support for the selection of suitable varieties in double cropping systems.[Method]A field experiment was conducted with japonica hybrid rice (including partial japonica of indica-japonica hybrid rice, partial indica of indica-japonica hybrid rice and pure japonica hybrid rice), japonica conventional rice and indica hybrid rice as materials in double-cropping rice areas (Shanggao of Jiangxi) in the middle reaches of the Yangtze River in 2010-2013. Differences and interrelation of yield, growth and utilization of temperature and illumination of rice cultivars with different types under the late rice of double cropping systems were studied systematically using cultivation with wet nursery and big seedlings transplanting.[Result]The yields of different types of rice cultivars under the late rice of double cropping systems all demonstrated japonica hybrid rice>japonica conventional rice>indica hybrid rice significantly or very significantly. Compared with indica hybrid rice, the yields of japonica hybrid rice and japonica conventional rice were increased by 19.20%-28.95% and 9.21%-12.17%, respectively. It was found that building enough total spikelets through adequate panicles and the large spikelets per panicle, and keeping a high seed-setting rate and 1000-grain weight was a basic way to improve yield structure comprehensively and obtain higher yield for japonica rice. Compared with indica hybrid rice, the growth periods of japonica hybrid rice and japonica conventional rice were delayed, and their total growth periods were significantly extended by 17.1 days and 9.5 days, respectively. And the utilization efficiency of temperature and illumination of various types of rice cultivars at different developmental stages showed that japonica hybrid rice>japonica conventional rice>indica hybrid rice, and the whole growth period trended similarly among which japonica hybrid rice were 3 713.3℃,924.9 h, 90.9%and 93.5%respectively.[Conclusion]The yield, growth and utilization of temperature and illumination among different types of rice cultivars under the late rice of double cropping systems had big differences. The suitable japonica rice varieties could make good use of longer growth yield with high utilization of temperature and illumination and increase the grain yield. According to the requirements of national japonica rice production development planning, considering the stubbles feature of double-cropping rice and heat conditions as well as the requirement of mechanized and simplified cultivation, a batch of late japonica rice cultivars of high yielding which were suitable for cultivation in the local were selected including Yongyou 538, Yongyou 8, Yongyou 2640, Yongyou 1538, Yongyou 1540, Changjiang 19, Changjiang 21, Xiaoyechishu and Zhendao 5108, in order to provide reference for rice production in large area.关键词
双季稻区/品种类型/晚稻/产量/生育期/温光利用Key words
double-cropping rice area/cultivator types/late rice/yield/growth stage/utilization of temperature and illumination引用本文复制引用
花劲,陈忠平,陈国梁,戴其根,许轲,魏海燕,高辉,郭保卫,周年兵,张军,张洪程,霍中洋,周培建,程飞虎,李国业,黄大山..双季稻区晚稻“籼改粳”品种筛选[J].中国农业科学,2014,(23):4552-4564,13.基金项目
国家“十二五”科技支撑计划重大项目（2011BAD16B03）、超级稻配套栽培技术开发与集成（农业部专项）、宁波市重大科技项目 （）
