养分管理对寒地直播稻生育进程和产量的影响  

Effect of nutrient management on fertility progress and yield of direct seeding rice in cold region

作　　者：刘元英[1] 罗盛国[1] 

机构地区：[1]东北农业大学资源与环境学院,哈尔滨150030

出　　处：《黑龙江科学》2018年第2期9-14,共6页Heilongjiang Science

摘　　要：采用微区和大田对比试验方法,设置直播和移栽两种栽培方式,研究养分管理对寒地直播稻生育进程、分蘖动态、干物质积累及产量的影响。结果表明,直播稻比移栽稻成熟期延迟4~5 d,能够安全成熟。优化施肥使直播稻提早成熟2~3 d;与移栽稻相比,优化施肥使直播稻抽穗后物质同化量提高了17%(P<0.01),对产量的同化贡献率13%(P<0.01)。直播与移栽相比,有效穗数减少27%(P<0.01),每穗粒数平均增加28个(P<0.01),结实率增加3.9%,千粒重无显著差别,产量基本持平。Two methods of direct seeding and transplanting were set up to compare the effects of nutrient management on the growth,tillering dynamics,dry matter accumulation and yield of direct seeding rice in cold region. The results showed that the sowing date of direct sowing rice was 4 ~ 5 d later than that of transplanting rice and could mature safely.Compared with transplanted rice,the optimized assimilation increased the assimilation amount of heading rice by 17%(P < 0. 01) and the contribution of yield to assimilation by 13%(P < 0. 01). Compared with transplanting,the number of panicles decreased 27%(P < 0. 01),the number of grains per panicle increased 28 on average(P < 0. 01),the seed setting rate increased 3. 9%,and the grain weight was no significant difference.

关 键 词：寒地直播稻 养分管理 生育进程 分蘖动态 干物质积累 产量 

分 类 号：S511[农业科学—作物学]