中国水稻科学2017，Vol.31Issue(4)：400-408,9.DOI:10.16819/j.1001-7216.2017.7035
淮北地区氮高效高产型粳稻品种群体生长特征研究
Characteristics of Population Growth in japonica Rice Varieties with High Nitrogen Use Efficiency and High Yield in Huaibei Area
摘要
Abstract
[Objective]The aim was to clarify the characteristics of population growth of japonica varieties with high nitrogen use efficiency and high yield in Huaibei Area.[Method]The yield components, number of stems and tillers,leaf area and population biomass production were investigated under their optimum N levels with 3 representative japonica varieties [high N use efficiency and high yield (HNUEHY), medium N use efficiency and high yield(MNUEHY), high N use efficiency and medium yield(MNUEMY)] as material. [Result]Number of stems and tillers increased slowly to the peak in jointing stage of HNUEHY, and then decreased gently with the highest percentage of productive tillers. The leaf area indexes of HNUEHY and HNUEMY were the highest and lowest at heading stage. The leaf area index of HNUEHY were 2.53% and 2.58% higher than that of MNUEHY and HNUEMY. The order of effective leaf area index was HNUEHY> HNUEMY> MNUEHY, the order of high effective leaf area index was MNUEHY> HNUEHY> HNUEMY. From heading to maturity stage, the photosynthetic potentials of HNUEHY and MNUEHY were 10.58% and 9.86%higher than that of HNUEMY, showing no obvious difference between each other. The total dry matter accumulation of HNUEHY was slightly lower than that of MNUEHY. From heading to maturity stage, the dry matter accumulations increased with increasing yield level with the highest ratio for HNUEHY. Before jointing stage, the crop growth rate of HNUEHY was lower than that of MNUEHY. After joining stage, the crop growth rate of HNUEHY were 8.79% and 17.46% higher than that of MNUEHY and HNUEMY. [Conclusion]The leaf area index, dry matter accumulation and crop growth rate of HNUEHY were less than those of MNUEHY and HNUEMY before jointing stage; while the photosynthetic potential, harvest index, percentage of productive tillers, crop growth rate and dry matter accumulation and ratio of HNUEHY were the highest from heading to maturity stage.关键词
水稻/氮高效高产/群体/生长特征Key words
rice/high nitrogen use efficiency and high yield/population/characteristics of growth分类
农业科技引用本文复制引用
梁健,赵晨,韩超,任红茹,陈梦云,张洪程,霍中洋..淮北地区氮高效高产型粳稻品种群体生长特征研究[J].中国水稻科学,2017,31(4):400-408,9.基金项目
国家科技支撑计划资助项目(2013BAD07B09, 2016YFD0200805) （2013BAD07B09, 2016YFD0200805）
江苏省科技计划资助项目(BE2015340, BE2016351) （BE2015340, BE2016351）
江苏省农业三新工程资助项目(SXGC[2016]321) （SXGC[2016]321）
扬州大学青蓝工程项目(2014). （2014）
