优化施肥对五优稻4号氮素吸收及转运影响  

Effect of optimized fertilization on N uptake, transportation of rice cultivar Wuyoudao4

作　　者：罗盛国[1] 王欢[1] 刘元英[1] 王丽娟[1] 赵广欣 

机构地区：[1]东北农业大学资源与环境学院,哈尔滨150030

出　　处：《东北农业大学学报》2016年第7期9-15,共7页Journal of Northeast Agricultural University

基　　金：科技部"十二五"科技支撑项目(2013BAD20B04)

摘　　要：采用大田对比试验方法,分别设置优化施肥和常规施肥两个处理,研究优化施肥对五优稻4号氮素吸收、积累及转运影响。结果表明,抽穗期和抽穗后20 d,民乐村、辉煌村试点优化施肥叶片含氮率分别比常规施肥高12.7%(P<0.01)和12.0%(P<0.01)、5.3%(P<0.05)和11.0%(P<0.01)。成熟期,试点优化施肥稻穗氮积累量比常规施肥高18.4%(P<0.01)和15.7%(P<0.01);茎叶氮转运量比常规施肥分别增加18.2%(P<0.05)和16.5%(P<0.05);氮同化贡献率分别提高3.7(P<0.05)和3.2个百分点(P<0.05);抽穗后氮同化量分别增加25.5%(P<0.05)和25.7%(P<0.05)。抽穗后氮同化量与产量呈极显著正相关。Two treatments （optimized fertilization and farmer＇s fertilization practice） were adopted to study the effects of optimized fertilization on N assimilation, accumulation and transportation. The results showed that the optimized fertilization could promote N absorption at late stages, increase N accumulation, and promote N transportation. At heading stage and 20 d after heading, the N contents in rice leaf in M-OPT and H-OPT were 12.7% （P〈0.01） and 12.0% （P〈0.01）, 5.3% （P〈0.05） and 11.0% （P〈 0.01） higher than that of M-FFP and H-FFP. At maturity stage, the N accumulation in panicle in M-OPT and H-OPT were 18.4% （P〈0.01） and 15.7% （P〈0.01） higher than that of M-FFP and H-FFP. The amount of N transportation in stem and leaf after heading were 18.2% （P〈0.05） and 16.5% （P〈0.05） higher than that of M-FFP and H-FFP, respectively; the contribution rate of post-heading N assimilation （CAN） to seed were 3.7 percentage points （P〈0.05） and 3.2 percentage points （P〈0.05） higher than that of M-FFP and H-FFP, respectively. The amount of N assimilation in stem and leaf after heading were 25.5% （P〈0.05） and 25.7% （P〈0.05） higher than that of M-FFP and H-FFP, respectively. The amount of N assimilation in stem and leaf after heading had a significantly positive correlation with rice yield （P〈 0.01）.

关 键 词：水稻 含氮率 氮积累量 茎叶氮转运量 抽穗后氮同化量 

分 类 号：S511[农业科学—作物学]