Effects of Tiller-inhibitor on Growth and Yield Formation of Super Early Hybrid Rice Jinyou458  

控蘖剂对超级早稻金优458生长发育及产量形成的影响(英文)

作　　者：钱银飞[1,2] 邱才飞[1] 邵彩虹[1] 陈先茂[1] 谢江[1] 邓国强[1] 彭春瑞[1] 任天志[2] 

机构地区：[1]江西省农业科学院土壤肥料与资源环境研究所,江西南昌330200 [2]中国农科院农业资源与农业区划研究所,北京100081

出　　处：《Agricultural Science & Technology》2011年第10期1444-1448,共5页农业科学与技术（英文版）

基　　金：Supported by High Yield and High Efficiency Technology Project of National Food Production(2006BAD02A04);National Agricultural Technology Support Program(2007BAD87B08);Doctoral Starting Fund of Jiangxi Academy of Agricultural Sciences(2009Dr.-1);Subject Leader Plan of Jiangxi Province;Postdoctoral Starting Fund of Chinese Academy of Agricultural Sciences~~

摘　　要：[Objective]The paper was to study the effect of tiller-inhibitor on the growth and yield formation of super early rice Jinyou 458.[Method] Two treatments including spraying tiller-inhibitor（TI） and spraying water（CK） at the SN-n stage were set in the test,the effect of tiller-inhibitor on yield and its components,leaf and plant morphology,field microclimate at booting stage and quality characteristics of rice population were studied.[Result] Spraying tiller-inhibitor could effectively reduce the occurrence of invalid and inefficient tillers,increase the proportion of high effective tillers（tiller with 4 or more leaves） in tiller composition at the maximal tiller stage.The panicle length,spikelets per panicle,spikelets density,number of secondary branches and the secondary spikelets,seed setting rate of rice plant sprayed with tiller-inhibitor were significantly higher than CK.Meanwhile,spraying tiller-inhibitor could increase plant height,biomass weight and leaf area index of rice population during middle and late stages of rice growing,improve the leaf temperature of top three leaves and the light transmittance of rice population at the booting stage,increase the leaf SPAD value,thus enhance photosynthetic capacity of rice plants.It also showed the characteristics of elongating the internode of rice plant and decreasing the stem thickness,etc.[Conclusion] The panicle-bearing rate of stems and tillers,effective panicles,spikelets per panicle,seed setting rate and 1 000-grain weight had coordinately increased after spraying tiller-inhibitor,thus increased the yield.[目的]研究控蘖剂对超级早稻品种金优458生长发育及产量形成的影响。[方法]试验设喷施控蘖剂和喷施清水两种处理,研究了控蘖剂对产量及其构成因素,稻株形态,孕穗期田间小气候及群体质量特征的影响。[结果]喷施控蘖剂处理能显著减少无效和低效分蘖的发生,增加高峰苗期分蘖构成中高效分蘖(单茎4叶及以上分蘖)所占比重。喷施控蘖剂处理的穗长、穗粒数、穗着粒密度、二次枝粳数及着生其上的二次颖花数及结实率均显著高于未喷施控蘖剂的对照。同时喷施控蘖剂能增加株高,中后期群体生物量和叶面积指数,提高孕穗期上三叶叶温和群体的透光性,增加叶片SPAD值,从而增强光合作用能力,但也表现出稻株节间长度增加,茎秆粗度减小等特点。[结论]喷控蘖剂措施处理最终表现为茎蘖成穗率、有效穗数、穗粒数、结实率和千粒重协调上升而增加产量。

关 键 词：Tiller-inhibitor Super early hybrid rice Jinyou 458 GROWTH YIELD 

分 类 号：S511.31[农业科学—作物学]