Fujian Journal of Agricultural Sciences ›› 2016, Vol. 31 ›› Issue (4): 333-337.doi: 10.19303/j.issn.1008-0384.2016.04.001

• Crop Science •     Next Articles

Effect of Different Nitrogen Levels on Dry Matter Production of Hybrid Rice

YANG Hui-jie1, FANG Xian-tao1, XIE Zu-qin1, HE Hua-rong1, ZHANG Ju-nian1, ZHUO Chan-ying2, CAI Guang-jing3, ZHAN Zhi-xiong1   

  1. 1. Rice Research Institute of Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350018, China;
    2. Youxi Academy of Agricultural Sciences, Youxi, Fujian 365100, China;
    3. Agricuture Technology Station of Youxi Xicheng town, Youxi, Fujian 365114, China
  • Received:2016-02-20 Revised:2016-04-04 Online:2016-04-28 Published:2016-04-28

Abstract: The effects of different nitrogen levels on dry matter production of two-line hybrid rice combination Guanglianguyou 676 were studied. The results indicated that the SPAD value kept higher level under more nitrogen fertilizers and leaf area index (LAI) increased with the increase of nitrogen levels. Crop growth rate (CGR) showed a positive linear correlation with nitrogen levels from transplanting to 30d after transplanting, but then a parabolic correlation. The nitrogen level of 20 g·m-2 has kept the highest CGR since 30d after transplanting. The total dry matter production exhibited a positive linear correlation with nitrogen levels at 30d after transplanting or at elongation stage, but a parabolic correlation at full heading stage or at mature stage. Grain yield was not significant correlation with dry matter accumulation in early stage, but had a significant and very closely significant positive correlation in middle and late stages respectively. About 20%-30% of the carbohydrates stored in stem and leaf transferred to the spike after full heading stage, which formed rice yield of 21.9%-31.3%.

Key words: hybrid rice, nitrogen level, dry matter, accumulation, transfer

CLC Number: 

  • S511.01