氮肥用量和播期对优良食味粳稻直链淀粉含量的影响  

Amylose Content in Good Eating Quality Rice Under Different Nitrogen Rates and Sowing Dates

作　　者：姚姝[1] 于新[1] 周丽慧[1] 陈涛[1] 赵庆勇[1] 朱镇[1] 张亚东[1] 赵春芳[1] 赵凌[1] 王才林[1] 

机构地区：[1]江苏省农业科学院粮食作物研究所,江苏省优质水稻工程技术研究中心,国家水稻改良中心南京分中心,南京210014

出　　处：《中国水稻科学》2016年第5期532-540,共9页Chinese Journal of Rice Science

基　　金：江苏省农业科技自主创新基金资助项目[CX(14)5107];江苏省科技支撑计划资助项目(BE2015335);现代农业产业技术体系建设专项(CARS-01-47)

摘　　要：以直链淀粉含量不同的半糯粳稻新品种(系)为材料,设置高氮(450kg/hm^2)、中氮(300kg/hm^2)、低氮(150kg/hm^2)和不施肥(CK)4个氮肥水平,分期播种并进行短日照处理,研究了氮肥用量和播期对优良食味粳稻直链淀粉含量的影响。结果表明,氮肥用量对优良食味粳稻的直链淀粉含量有显著影响,随着氮肥用量的增加,直链淀粉含量有降低的趋势,两年均以高氮处理的直链淀粉含量最低。播期对优良食味粳稻的直链淀粉含量也有显著影响,随播期的推迟,直链淀粉含量呈降低趋势,这主要与抽穗后6~15d的温度有关,高温可使直链淀粉含量提高。短日照处理的结果也证实了这一点。The amylose content in good eating quality rice was investigated under four nitrogen application levels including high（450kg/hm2）,medium（300kg/hm2）,low（150kg/hm2）and zero（CK）levels,different sowing dates and short daylight treatment by using the semi-glutinous newjaponica rice varieties（strains）with different amylose content in 2013 and 2014.The results showed that the level of nitrogen fertilizer has a significant effect on amylose content of good eating quality japonica rice.The amylose content was decreased with the increasing level of nitrogen fertilizer.The amylose content under the high nitrogen level was the lowest in the two years.Sowing date has a significant influence on amylose content of good eating quality japonica rice.The amylose content was decreased with the sowing date postponed.The effect of sowing date on amylose content was related to the temperature during 6-15 days after heading,and high temperature resulted in the increase of amylose content.This was also confirmed under the short daylight treatment.

关 键 词：氮肥用量 播期 优良食味粳稻 直链淀粉含量 

分 类 号：S511.22[农业科学—作物学]