群体茎数动态对龙粳20稻谷产量与食味值的影响  

Effects of Stem and Tiller Development on Yield and Taste Value of Longjing 20 in Rice Group

作　　者：钱永德[1] 胡远富 郑桂萍[1] 李晓蕾[1] 马艳[1] 汪秀志[1] 

机构地区：[1]黑龙江八一农垦大学农学院,大庆163319 [2]黑龙江双峰农场

出　　处：《黑龙江八一农垦大学学报》2013年第2期5-11,29,共8页journal of heilongjiang bayi agricultural university

基　　金：黑龙江农垦总局科技攻关资助项目(HNK11A-01-01-02);黑龙江科技厅重大项目GA10B102;国家科技支撑项目(2007BAD65B)

摘　　要：为了探讨水稻高产优质的实现途径,以龙粳20为供试材料,以氮、镁为变量,采取裂区设计,构建不同群体,研究群体茎蘖动态对水稻产量和食味的影响。结果表明:低氮配合低镁或高氮配合高镁时群体最高茎蘖较多;单独施用时以低镁处理收获穗数较多,镁与氮肥配合施用后,以公顷施硫酸镁225.0 kg.hm-2时收获穗数较多;施氮量与群体有效分蘖率呈典型的单峰曲线,施用镁肥对有效分蘖率无明显影响;有效分蘖率与产量呈典型的单峰曲线、与品质(食味值)无显著相关;群体最高茎蘖数、分蘖成穗率、有效茎数与产量和品质均呈显著单峰曲线,试验条件下公顷产量达到9 000 kg稻谷以上的水稻群体最高茎数平均为671.9个.m-2,变化幅度在594.4～759.1个.m-2之间;收获穗数为594.9个.m-2,在541.7～680.6个.m-2之间;有效分蘖率变化范围为75.0%～95.5%、平均为86.6%;分蘖穗比率平均为81.2%,变化范围为79.3%～83.7%。Longjing 20 （Oryza sativa L.）was taken as experimental material to study the effects of N and Mg fertilizer on stem and tiller development in a split-plot design. The results showed that stems and tillers of the population were the most with the low N and low Mg or high N and high Mg used in the plots. The panicle number was greater with low Mg and without N fertilizer. When Mg and N fertilizers were applied together,the panicle number of the treatment with 225.0 kg·hm-2 MgSO4. The effective tillering rate had a quadratic relation with N fertilizer. The Mg fertilizer had no significant effect on effective tillering rate. The effective tillering rate of the population showed a quadratic relation with grain yield, but it had no significant correlation with quality （taste value）. Both grain yield and quality had a quadratic relation with the most stems, tillering rate and effective stems. When the rice population yield was more 9 000 kg.hm-2,the average stems and tillers were 671.9 number＇m-2 （594.4-759.1 m-2） ,harvested panicles 594.9 number·m-2 （ 541.7-680.6 number·m-2）, effective tillering rate 86.6%（ 75.0%-95.5% ）and the ratio of panicles from tillers 81.2%（ 79.3%-83.7% ）.

关 键 词：氮 镁 水稻 茎数动态 产量 食味值 

分 类 号：S511[农业科学—作物学]