抛栽密度对赣南中低产田区双季晚稻产量的影响  

Effects of Seedling-throwing Density on Yield of Double-cropping Later Season Rice in Middle-yielding and Low-yielding Fields of Southern Jiangxi Province

作　　者：钟珺[1] 黎为兵[1] 胡启锋[2] 李祖章[2] 张朝阳 连垚 李云[1] 虞新华 

机构地区：[1]赣州市农业科学研究所,江西赣州341000 [2]江西省农业科学院,江西南昌330200 [3]兴国县农业技术推广中心,江西兴国342400

出　　处：《安徽农业科学》2015年第36期51-53,共3页Journal of Anhui Agricultural Sciences

基　　金：国家科技支撑计划项目(2011BAD16B04;2012BAD04B11)

摘　　要：[目的]研究赣南中低产田区双季晚稻适宜抛栽密度。[方法]对晚稻品种欣荣优2660和五优308设置4种不同抛栽密度,研究抛栽密度对其产量、茎蘖动态、叶面积指数、剑叶SPAD值及干物质生产的影响。[结果]2个品种的产量随密度增加而增加,抛栽密度34.5万蔸/hm2处理与抛栽密度21.0万蔸/hm2处理相比,欣荣优2660增产5.89%,五优308增产2.3%;有效穗数随抛栽密度增加而明显增加;较高抛栽密度有利于孕穗后叶面积指数和剑叶SPAD值维持较高水平,从而增强了光合能力,增加了干物质累积量。[结论]赣南中低产田区双季晚稻适宜抛栽密度为34.5万蔸/hm^2。[Objective]To study the appropriate seedling-throwing density in middle-yielding and low-yielding fields of southern Jiangxi Province. [Method] By setting up four different seedling-throwing density,the two later season varieties Xinrongyou 2660 and Wuyou 308 was used to study the effects of seedling-throwing density on yield,tillering dynamic,LAI,flag leaf SPAD and dry matter production.[Result]The yield of two varieties increased. Compared with treatment of 210 000 clumps per hectare,the yield of 345 000 clumps per hectare treatment increased 5. 89% with Xinrongyou 2660,and increased 2. 3% with Wuyou 308. The effective panicle number increased obviously as the density increased. The higher seedling-throwing density treatments were conducive to keeping higher level of leaf area index,flag leaf SPAD value after booting stage,thus strengthening the photosynthetic production capacity,and increased the dry matter production and accumulation for whole growth stage. [Conclusion ]The appropriate seedling-throwing planting density in middle-yielding and low-yieldin fields of southern Jiangxi Provnce is 345 000 clumps per hectare.

关 键 词：中低产田 双季晚稻 抛栽密度 

分 类 号：S511[农业科学—作物学]