品种与播量对直播早稻群体质量和产量的影响  

Effects of Variety and Sowing Rate on Population Quality and Yield of Direct Seeding Early Rice

作　　者：王常军 周金龙 谭爱琼 龙玉斌 赵二毛 邓立平 WANG Changjun;ZHOU Jinlong;TAN Aiqiong;LONG Yubin;ZHAO Ermao;DENG Liping(Bureau of Agricultural and Rural Affairs of Liling City,Liling,Hunan 412205,China;Mingyue Township Agricultural Comprehensive Service Station of Liling City,Liling,Hunan 412215,China)

机构地区：[1]醴陵市农业农村局,湖南醴陵412205 [2]醴陵市明月镇农业综合服务站,湖南醴陵412215

出　　处：《杂交水稻》2024年第2期105-109,共5页Hybrid Rice

基　　金：国家水稻产业技术体系项目(CARS-01-30)。

摘　　要：采用两因素随机区组试验设计,研究不同品种和播量对直播早稻群体质量和产量性状的影响。结果表明,双季直播早稻品种间出苗率、成苗率、成穗率和结实率差异不显著;最高苗和单位面积有效穗数差异显著;单产以中早39最高,中早35与之差异不显著,而湘早籼6号与之差异极显著。单位面积出苗数、同期茎蘖数、有效穗数随播量的增加而增加,出苗率、成苗率、分蘖率、成穗率及每穗总粒数随播量的增加而下降,单产以播量112.5 kg/hm^(2)处理最高,播量90.0 kg/hm^(2)处理与之差异不显著,而播量67.5 kg/hm^(2)处理与之差异极显著。在本试验条件下,中早35和湘早籼6号直播的适宜播量为112.5 kg/hm^(2),而中早39直播的适宜播量为90.0 kg/hm^(2)。A two-factor randomized block experiment was used to study the effects of different varieties and sowing rates on the population quality and yield traits of direct seeding early rice.The results showed that there were no significant differences in seedling emergence rate,seedling rate,panicle-bearing tiller rate and seed setting rate,but there were significant differences in the highest seedlings and the number of effective panicles per unit area,among the double-cropping direct seeding early rice varieties.The yield of Zhongzao 39 was the highest,which is not significantly different from that of Zhongzao 35 but significantly different from that of Xiangzaoxian 6.The number of seedlings per unit area,the number of tillers at the same period and the number of effective panicles increased with the increase of sowing rate,while the seedling emergence rate,seedling rate,tillering rate,panicle-bearing tiller rate and total spikelets per panicle decreased with the increase of sowing rate.The yield was the highest with the sowing rate of 112.5 kg/hm^(2),which is not significantly different from the sowing rate of 90.0 kg/hm^(2),but very significantly different from the sowing rate of 67.5 kg/hm^(2).Under the experimental conditions,the suitable sowing rate for direct seeding of Zhongzao 35 and Xiangzaoxian 6 is 112.5 kg/hm^(2),while the suitable sowing rate for direct seeding of Zhongzao 39 is 90.0 kg/hm^(2).

关 键 词：早稻 直播 播量 群体质量 产量 

分 类 号：S511.04[农业科学—作物学] S318