南方农业学报2013，Vol.44Issue(6)：954-957,4.DOI:10.3969/j:issn.2095-1191.2013.6.954
氮肥运筹对桂两优2号干物质生产及氮肥利用率的影响
Effects of nitrogen management on dry matter accumulation and nitrogen use efficiency of Guiliangyou 2
摘要
Abstract
[Objective]Super rice Guiliangyou 2 was used to study the effects of nitrogen (N) management on dry matter (DM) accumulation and N-use efficiency in Guangxi Province.[Method]Field trials with five N treatments [three nitrogen rates:0 (N0),210 (N1) and 255 (N2) kg/ha; two N fertilizer distribution ratio:5:3:2 (E1) and 4:3:3 (F2) for basal,tillering and heading dressings,respectively] were conducted.[Result]The results showed that DM accumulation of Guiliangyou 2 at different stages significantly increased due to nitrogen fertilizing.Thus,compared to other treatments,F2N1 and F2N1 treatments raised DM increment after heading and its contribution to yield.The total nitrogen uptake of Guiliangyou 2 increased with the increasing applied N,and F2 treatment was beneficial to improve the absorption of nitrogen from the soil and N fertilizer.With the same N fertilizer rate,a certain increase of NPFP,NAE and NRE in F2 treatments were found compared with F1.Despite F2N2 treatment obtaining the highest yield,there was no significant difference between F2N1 and F2N2,NPFP,NAE and NRE of F2N1 were the highest.[Conclusion]F2N1 treatment,with N rate of 210 kg/ha and N fertilizer distribution ratio of 4∶3∶3 for basal,tillering and heading dressings,could obtain high yield with high N-use efficiency in the production of Guiliangyou 2 sown in late season.The yield of F2N1 treatment was 8170.2 kg/ha.NPFP,NAE and NRE were 38.9 kg/kg,12.6 kg/kg and 41.5％,respectively.关键词
桂两优2号/氮肥运筹/干物质生产/产量/氮肥利用率Key words
Guiliangyou 2/nitrogen management/dry matter accumulation/yield/nitrogen use efficiency分类
农业科技引用本文复制引用
陈仁天,陶伟,陈雷,王强,唐茂艳,张晓丽,吕荣华,张宗琼,梁天锋..氮肥运筹对桂两优2号干物质生产及氮肥利用率的影响[J].南方农业学报,2013,44(6):954-957,4.基金项目
广西自然科学基金项目(2011GXNSFA018104) （2011GXNSFA018104）
广西农业科学院科技发展基金重点项目(桂农科2011JZ03) （桂农科2011JZ03）
广西科学研究与技术开发计划项目(桂科攻1123001-1A) （桂科攻1123001-1A）
公益性行业(农业)科研专项项目(201303102) （农业）
