栽植密度和播期对水稻广两优5号产量形成的影响  

Effect of Planting Density and Sowing Date to Yield Formation of Hybrid Rice Guangliangyou 5

作　　者：吴建平[1,2] 陈少愚 李阳[1,2] 赵锋[1,2] 徐得泽[1,2] 蔡海亚[1,2] 游艾青[1,2] 万晟杰 费长亮 程建平[1,2] 张旅峰 章桃娟 皮楚舒 

机构地区：[1]粮食作物种质创新与遗传改良湖北省重点实验室/湖北省农业科学院粮食作物研究所,武汉430064 [2]主要粮食作物产业化湖北省协同创新中心长江大学,湖北荆州434000 [3]阳新县农业局,湖北阳新435200 [4]湖北省浠水县农业技术推广中心,湖北浠水438200

出　　处：《湖北农业科学》2015年第24期6157-6160,共4页Hubei Agricultural Sciences

基　　金：国家重大科技专项资助项目(2011BAD16B02;2012BAD04B12;2013BAD07B00);国家水稻产业技术体系项目(CARS-01-04A);国家农业科技成果转化项目(2012GB2D100299);湖北省科技厅研发项目(YJN0204);湖北省科技厅公益性科技研究项目(2012DBA41);湖北省科技支撑计划项目(2014BBB002);湖北省重大科技创新计划项目(2014ABA027);国家"973"计划项目(2013CBA01405);国家"863"计划项目(2012AA101101);湖北省农业科学院青年基金项目(2014NKYJJ31)

摘　　要：考察了栽植密度、播期对广两优5号产量形成的影响。结果表明,广两优5号栽植密度为22.5万穴/hm2、播期在4月25日产量最高。广两优5号随栽植密度增大,茎蘖数峰值提高、有效穗数增多、每穗实粒数减少;随播期推迟,该组合分蘖峰值滞后,无效分蘖增多、穗实粒数减少。4月25日后播种、栽植密度22.5万穴/hm2时,广两优5号产量最高可达753.3 kg/667 m2;5月5日及以后播种,广两优5号产量显著降低。广两优5号在湖北省种植适宜播期为4月中下旬,栽植密度应保持22.5万穴/hm2。To investigate yield formation factors of Guangli angyou No.5 under different planting density and sowing date, the result showed that Guangliangyou No.5 under cultivated density of 22.5×10^4 hill/hm2 or its sowing date on April 25 could gain the highest yield. With the increase in plant density, not only that tiller numbers peak value of rice was increased, but also unavailable tiller increased, so panicle number and grain number per spike were reduced. When sowing date was postponed, tiller peak value appearance date was delayed, the unavailable tiller increased and the number of grains per spike was reduced. This result concluded that the rice production can be up to 753.3 kg/667 m2 when its planting density is 22.5×10^4 hill/hm2;the rice should be seeded after the May 5th, whenever the sowing date were earlier or later, the yield was decreased. As a high-yield and late maturity hybrid rice varieties, Guangliangyou 5 is suitable to be seeded in Hubei province in mid-to-end of April, and the planting densities should be kept around 22.5×10^4 hill/hm2.

关 键 词：杂交水稻 广两优5号 栽植密度 播期 产量形成 

分 类 号：S511[农业科学—作物学]