氮镁耦合对寒地早粳龙粳20商品品质影响  

EFFECTS OF NITROGEN AND MAGNESIUM COUPLING ON COMMERCIAL QUALITIES OF THE EARLY JAPONICA LONGJING20 IN COLD REGION

作　　者：钱永德[1] 左豫虎[1] 郑桂萍[1] 李晓蕾[1] 马艳[1] 赵凤亮[2] 

机构地区：[1]黑龙江八一农垦大学农学院,黑龙江大庆163319 [2]中国热带农业科学院环境与植物保护研究所,海南海口571101

出　　处：《核农学报》2013年第1期118-125,共8页Journal of Nuclear Agricultural Sciences

基　　金：国家科技支撑项目(2007BAD65B);黑龙江科技厅重大项目GA10B102;黑龙江农垦总局科技攻关资助项目(HNK11A-01-01-02);黑龙江省重点学科群"黑龙江优质米生产全程化"资金

摘　　要：以龙粳20为供试材料,经2009年与2010年2年试验,研究了氮镁耦合对寒地早粳稻品质的影响。结果表明,氮或镁肥单独施用时,籽粒直链淀粉含量随氮肥增加而降低,增施氮肥使垩白率、粗蛋白含量提高,施氮量与整精米率呈二次曲线,镁肥单独施用能够提高籽粒粗蛋白含量,施镁量与垩白率及整精米率呈二次曲线;氮镁耦合后,镁处理对籽粒垩白率、整精米率的影响均达到极显著水平;籽粒粗蛋白含量与垩白率呈正相关、与整精米率呈负相关;直链淀粉含量与粗蛋白含量呈负相关。2年试验表明,在不同氮水平处理下,以施镁225.0～337.5kg·hm-2范围内籽粒的垩白率、整精米率及粗蛋白含量较理想。Longjing20 was taken as experimental material to study the effects of nitrogen and magnesium coupling on nutritional quality and commodity quality of the early Japonica in cold region from 2009 year to 2010 year.The results showed that,with more nitrogen fertilizer applied,the amylose content in rice grain declined and the chalky rice rate and crude protein content increased.The relationship between the amount of nitrogen fertilizer and the head rice rate could be described quadratic equation.Crude protein content increased with more magnesium fertilizer applied.The relationship between the amount of magnesium of applied and head rice rate could also described quadratic equation.Coupling of nitrogen and magnesium significantly affected the grain chalky rice rate and head rice rate.The crude protein content in grain had a positive correlation with the chalky rice rate,while it had a negative correlation with the head rice rate.The amylase content in rice grain was negatively related to the crude protein content in rice grain.Results of the two-year experiment indicated that lower rate of chalky rice,higher rate of head rice and high amount of crude protein in rice grain could be achieved by applying magnesium fertilizer within the range of 225.0kg·hm-2 to 337.5kg·hm-2.

关 键 词：水稻 氮 镁 商品品质 

分 类 号：S511.22[农业科学—作物学]