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光周期和有效积温对水稻分蘖角度动态变化的影响

欧阳由男1,2;李春生1;章善庆1;王会民1;朱练峰1;禹盛苗1;金千瑜1;张国平2   

  1. 1中国水稻研究所水稻生物学国家重点实验室, 杭州 310006;2浙江大学农业与生物技术学院, 杭州 310029
  • 收稿日期:2008-10-24 修回日期:1900-01-01 出版日期:2009-05-20 发布日期:2009-05-20

Dynamic changes of rice (Oryza Sativa L.) tiller angle under effects of photoperiod and effective accumulated temperature.

OUYANG You-nan1,2;LI Chun-sheng1;ZHANG Shan-qing1;WANG Hui-min1;ZHU Lian-feng1;YU Sheng-miao1;JIN Qian-yu1;ZHANG Guo-ping2   

  1. 1State Key Laboratory for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China;2College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China
  • Received:2008-10-24 Revised:1900-01-01 Online:2009-05-20 Published:2009-05-20

摘要: 通过田间播期试验、植物培养箱人工光周期和温度试验研究了水稻DI508分蘖角度动态变化特性与光周期和温度的关系.结果表明:不同播期(4月4日、5月5日、6月4日)条件下,大田DI508分蘖角度从半散生到渐趋直立的变化均发生在自然光周期变短(6月21日,夏至)后的10~15 d;在光周期条件下,DI508的分蘖角度同样具有动态变化特性,10 h光照处理可使分蘖角度提前从半散生向直立转变,14 h光照处理则延缓转变.温度处理对水稻分蘖角度的变化特性没有显著影响.

关键词: 食用甘薯, 施钾时期, 淀粉积累, 酶活性

Abstract: Using rice variety DI508 as test material, a field experiment of different seeding dates and a test with plant growth chamber were conducted to study the dynamic changes of rice tiller angle under effects of different photoperiod and effective accumulated temperature. Under field condition, the tiller angle of DI508 plants changed gradually into erect after 10〖KG-*2〗-〖KG-*7〗15 days of photoperiod becoming shorter (since the Summer Solstice on 21st June), irrespective of seeding dates (4th April, 5th May, and 4th June). Under controlled photoperiod, the tiller angle changed in the same way as in the field. Shorter lighting treatment (10 hours) advanced the tiller angle change, while longer lighting treatment (14 hours) delayed the change. Effective accumulated temperature had no effects on the tiller angle change of DI508.

Key words: edible sweetpotato, potassium fertilization period, starch accumulation, enzyme activity.