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Chinese Journal of Applied Ecology ›› 2002, Vol. ›› Issue (10): 1210-1214.

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HUANG Jianye1, YANG Hongjian1, DONG Guichun1, WANG Yulong1, ZHU Jianguo2, YANG Lianxian1, SHAN Yuhua 1   

  1. 1. Key Laboratory of Crop Cultivation and Physiology, Ministry of Agriculture, Yangzhou University, Yangzhou 225009;
    2. Institute of Soil Science, Chinese Academy of Science, Nanjing 210008
  • Received:2002-06-12 Revised:2002-08-03 Online:2002-10-15

Abstract: Effect of Free-Air CO2 enrichment (FACE,200μmol·mol-1 higher than CK) on rice yield and its components under field condition were studied with a Japonica variety 99-15. Results showed that FACEtreatment had no obvious effect on plant height and number of leaves on main stem, but could quicken growth process of rice, shorten the whole growth duration. Increment of nitrogen application rate could weaken the effect of FACEon whole growth duration. The number of tillers and panicles, and fulfilled-grain percentage increased significantly under FACEtreatment, whereas spikelets per panicle decreased.FACEtreatment could significantly increase grain yield of rice, especially when higher rate of nitrogen fertilizer was applied.Increasing spikelets per panicle and spikelets per unit area under FACEtreatment would result in marked increment of rice yield. Increasing nitrogen application rate was an important approach to increase spikelets per panicle and spikelets per unit area under FACEtreatment.

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