嘉兴地区不同基因型水稻的氮利用效率研究  

Characteristics of N utilization efficiency in different rice genotypes in Jiaxing area

作　　者：陈贵[1] 张红梅[1] 沈亚强[1] 赵国华[2] 程旺大[1] 

机构地区：[1]嘉兴市农业科学研究院农业生态环境研究室,浙江嘉兴314016 [2]嘉兴学院生物与化学工程学院,浙江嘉兴314001

出　　处：《浙江农业学报》2015年第11期1965-1970,共6页Acta Agriculturae Zhejiangensis

基　　金：嘉兴市科技计划项目(2014AZ21005;2012AY1055);嘉兴市科技局重点项目(2011AZ1018)

摘　　要：为了明确在产量方面有差异的不同基因型水稻的氮利用特性及其影响因子,以便为氮高效水稻品种的选育提供理论指导,本研究选取了10个基因型水稻品种和3个供试点,对水稻产量、氮累积、氮转运效率和转运量以及氮生理利用效率进行研究,并分析各指标间的相关关系。结果表明:在同一供试点不同基因型水稻间的产量和氮利用特性相关指标均存在显著差异,同一基因型水稻在不同供试点也存在明显差异,不同基因型品种水稻和供试点间的交互作用亦可对氮利用特性发挥明显作用。水稻产量与总氮累积、齐穗期氮累积、氮转运量和氮生理利用效率均呈极显著(P<0.01)正相关关系。氮生理利用效率与总氮累积、分蘖期氮累积和齐穗期氮累积极显著(P<0.01)负相关,而与氮转运效率和转运量呈极显著(P<0.01)正相关。因此,尽管水稻氮累积量增加对氮素吸收效率有促进作用,但可能导致氮生理利用效率降低;提高水稻齐穗期后的氮转运效率和转运量有利于提高水稻氮生理利用效率。To further understand characteristics of nitrogen（ N） utilization efficiency in different rice genotypes with varied grain yields,which would be helpful for the breeding of rice cultivars with higher N use efficiency,field experiments were conducted in Jiaxing City,Zhejiang Province. Grain yield,N accumulation,N translocation efficiency and amount,N physiological use efficiency of 10 rice cultivars in 3 study sites were analyzed. The results showed that rice grain yield and other indexes related to N utilization properties among rice cultivars were significantly different in each study site. The same results were also found among 3 study sites for each rice genotype. Furthermore,rice cultivars had significant interaction with study sites. There were significantly（ P 0. 01） positive relationship between grain yield and total N accumulation during periods of whole growth stage and heading stage,and N redistribution amount,as well as N physiological use efficiency. N physiological use efficiency showed significantly（ P 0. 01）negative correlation with N accumulation at tillering,heading and mature stages obviously. However,N redistribution efficiency and redistribution amount had significantly（ P 0. 01） positive relationship with N physiological use efficiency. Therefore,rice with larger amount of N accumulation might appear lower N physiological use efficiency,al-though it might increase N uptake efficiency. Increasing N redistribution efficiency and amount after rice heading stage would be favorable for higher N physiological use efficiency.

关 键 词：水稻 氮素 产量 利用效率 相关性 

分 类 号：S511.3[农业科学—作物学]