福建农业学报Issue(8)：725-732,8.
栽插苗数对超级稻南粳49冠层和产量的影响
Effect of Seedling Planting Density on Canopy and Yield of Super-rice,Nanjing 49
摘要
Abstract
Nanjing 49 was used in the experimentation to determine the effect of seedling planting density on the canopy and yield of the super-rice . The results showed that Nanjing 49's adaptability to the varying planting density was rather broad .It could reach a high yield at the range of 2 -4 plans · hill-1 . However ,when the planting density was more than 5 plants · hill-1 ,the productivity significantly reduced .It appeared that Nanjing 49 adapted to the varied planting density by different means . For example ,at the rate of 2 plants · hill-1 ,it increased the total dry matters to reach a high yield by increasing its tillers per plant ,total grains per spike ,and photosynthetic capacity per leaf . At 3 plants · hill-1 ,a high yield was achieved through increasing the total leaf area and effective panicles per hill . Then ,when the planting was increased to 4 plants · hill-1 ,it improved the yield by increasing LAI and reducing the leaf's base angle of the second leaves to effectively increase the sunlight reception . Therefore , with its high adaptability to the planting density ,Nanjing 49 could provide a yield as high as (12.63 ± 0.253) t · hm -2 on a reduced number of seedlings · hill-1 (e .g .,2 plants · hill-1 ) to save on the planting cost .关键词
南粳49/栽插苗数/净光合速率/群体质量/干物质积累/产量Key words
Nanjing 49/seedling planting/Pn/crop quality/dry weight accumulation/yield分类
农业科技引用本文复制引用
柯希欢,李霞,仲维功,范方军,钱宝云..栽插苗数对超级稻南粳49冠层和产量的影响[J].福建农业学报,2014,(8):725-732,8.基金项目
国家自然科学基金项目（31371554）；国家科技支撑计划重大项目（2011BAD16B03）；江苏省自主创新基金（CX ［（12）1003］）；国家转基因重大专项（2014ZX08001-004-001-009）；国家环保部项目（201009023）；江苏省自然科学基金 （）
