机插早稻分蘖成穗特性及基本苗公式参数研究
Tillering and Panicle Formation Characteristics of Machine-transplanted Early Rice and Its Parameters of Basic Population Formulae
摘要
Abstract
To accurately determine planting density and make reasonably use of tillers for machine-transplanted early rice, we examined the tillering and panicle formation characteristics and the parameters related to basic population formulae with four early rice combinations (Zhuliangyou 30, Zhuliangyou 189, Zhongjiazao 17, and Jiazao 311). Results showed that the primary tillers of the machine-transplanted early rice initiated mainly from leaf 3 to leaf 6 on main stems with leaves 4 and 5 being the superior positions for tiller initiation and panicle formation. Secondary tillers initiated mainly in 1/3, 2/3, 1/4, but could not form panicles. The panicle number per seedling was 3.1 and 2.2 for hybrid rice and inbred rice, respectively. Panicles at superior leaf positions on both main stems and tillers showed better properties and higher productivity, thus making greater contributions to the yield. For hybrid rice mechanically transplanted at the stage with 3 to 4 leaves, the leaf age without tillering (bn) was 1.7 to 1.8, with the correction factor (a) of−1.2 to−1.1 and the percentage of productive tillers (r) of 0.75. For inbred rice, the bn, a, and r were 2.5 to 2.7,−1.3 to−1.1, and 0.7, respectively. In conclusion, in order to obtain a high yield of machine-transplanted early rice, the key strategy is to ensure a sufficient number of basic seedlings, and promote tillering as early and many as possible, whereby increasing the percentage of productive tillers.关键词
机插早稻/分蘖特性/成穗规律/基本苗/参数Key words
Machine-transplanted early rice/Tillering characteristics/Rules of panicle formation/Basic population/Parameters引用本文复制引用
吕伟生,曾勇军,石庆华,潘晓华,黄山,商庆银,谭雪明,李木英,胡水秀..机插早稻分蘖成穗特性及基本苗公式参数研究[J].作物学报,2016,42(3):427-436,10.基金项目
本研究由国家科技支撑计划项目(2011BAD16B04),国家公益性行业科研专项(201303102),国家农业科技成果转化资金项目(2013GB2C500244),江西省高等学校科技落地计划(KJLD12003),江西省水稻产业体系建设专项(JXARS-02-03),江西省研究生创新专项资金项目(YC2014-B034)和中国农业科学院水稻高效栽培技术创新团队项目资助。This study was supported by the Key Project of the National Twelfth-Five Year Research Program of China (2011BAD16B04), Special Fund for Agro-Scientific Research in the Public Interest (201303102), National Transformation Fund for Agricultural Science and Technology Achieve-ments (2013GB2C500244), Science and Technology Plan of Action for Universities and Colleges in Jiangxi Province (KJLD12003), Special Fund for Rice Industry System of Jiangxi Province (JXARS-02-03), Special Fund Project for Graduate Student Innovation in Jiangxi Province (YC2014-B034) and Innovation Team Project for Efficient Cultivation Technology of Rice of Chinese Academy of Agricultural Sciences （2011BAD16B04）
