中国水稻科学2016，Vol.30Issue(3)：273-282,10.DOI:10.16819/j.1001-7216.2016.5128
氮肥对水稻节间和叶鞘非结构性碳水化合物积累转运特征的影响
Effects of Nitrogen Application on Accumulation and T ranslocation of Non-structural Carbohydrates in Internodes and Sheaths of Rice
摘要
Abstract
Two indica rice varieties ,Liangyoupeijiu (LYP9) and Yangdao 6 (YD6) ,were grown in pots under low (N1 ) and high (N2 ) nitrogen application rates .The accumulation and translocation of non‐structural carbohydrates (NSC) in the top‐most three internodes and leaf sheaths of main stems and its contributions to grain yield were investi‐gated .1) Compared with N2 treatment ,N1 treatment enhanced NSC translocation of the second and third internodes and sheaths in LYP9 during the early grain filling stage ,and also increased the apparent transferred mass of NSC (ATMNSC ) of the three internodes from the top and sheaths in YD6 and the third internode from the top and sheath in LYP9 ,respectively .However ,N1 treatment had no obvious effect on ATM NSC of the top first and second internodes and sheaths in LYP9 .Noticeably ,N1 treatment increased the apparent contributions of NSC to grain yield (ACNSC ) of the three internodes and sheaths in both two varieties .2) Except the top‐most third sheath in LYP9 ,the ATMNSC and ACNSCof sheaths were higher than those of internodes in both two varieties under N 1 and N2 treatments .3) Under N1 and N2 treatments ,ATMNSC and ACNSC of the top‐most second and third internodes and sheaths ,and total ATMNSC and ACNSC of the three internodes and sheaths in LYP9 were higher than those in YD6 ,respectively .4) Under N1 treat‐ment ,the top‐most second and third internodes and sheaths totally contributed 92% and 91% of total ATMNSC and ACNSC of the three internodes and sheaths in LYP9 ,and 75% and 76% in YD6 .Under N2 treatment ,the top‐most sec‐ond and third internodes and sheaths totally contributed 90% and 91% in LYP9 ,and no NSC translocation from the top‐most second and third internodes and totally accounted for 77% of total ACNSC .Our results indicated that ATM NSC of the three internodes and sheaths showed genotypic variation and depended on internode/sheath ,and was affected by N application rate .Optimizing N fertilizer application and selecting suitable rice variety might enhance pre‐anthesis NSC accumulation and post‐anthesis NSC translocation ,which could further increase rice yield potential and nitrogen use ef‐ficiency ,especially stability of grain yield under adverse environments and nitrogen fertilizer‐reducing practice .关键词
水稻/氮肥/节间和叶鞘/非结构性碳水化合物/产量形成Key words
rice/nitrogen application/internode and sheath/non-structural carbohydrates(NSC)/yield formation分类
农业科技引用本文复制引用
潘俊峰,王博,崔克辉,黄见良,聂立孝..氮肥对水稻节间和叶鞘非结构性碳水化合物积累转运特征的影响[J].中国水稻科学,2016,30(3):273-282,10.基金项目
国家自然科学基金资助项目（31371548）；国家科技支撑计划资助项目（2013BAD07B10）。 （）
