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剪叶、粘叶处理对水稻剑叶主脉两侧SPAD值及籽粒产量的影响

  1. 1贵州大学农学院,贵阳 550025;2黔东南民族职业技术学院,贵州 凯里 556000
  • 出版日期:2018-11-20 发布日期:2018-11-20
  • 基金资助:

    国家自然科学基金(31360311);公益性行业(农业)科研专项经费项目子项(201503118-03);贵州省农业科技攻关项目(黔科合NY[2013]3005号);贵州省作物学省级重点学科建设计划(黔学位合字ZDXK[2014]8号);贵州省普通高等学校粮油作物遗传改良与生理生态特色重点实验室项目(黔教合KY字[2015]333)

Effects of Leaf-cutting and Sticking Treatments on Leaf SPAD Value about Two Sides of Main Vein of Flag Leaf and Grain Yield of Rice

  • Online:2018-11-20 Published:2018-11-20

摘要:

为了比较水稻剑叶主脉两侧(光滑侧、粗糙侧)对籽粒产量贡献的差异,以杂交水稻Q优6号和准两优527为材料,在3种施氮水平(0 kg/hm2、150 kg/hm2、300 kg/hm2)下,采用剪叶、粘叶的方法设置5种处理(距叶枕2 cm剪断光滑侧,距叶枕2 cm剪断粗糙侧,粘光滑侧叶长中间部10 cm段,粘粗糙侧叶长中间部10 cm段和空白对照),分析相同条件下处理间的籽粒总质量、粒重叶长比、千粒重、结实率以及SPAD值变化等情况。结果表明,处理光滑侧的籽粒总质量较处理粗糙侧的低,但相同品种同一施氮水平下各处理间的籽粒总质量、千粒重、每穗粒数、结实率无显著差异。Q优6号、准两优527剑叶粒重叶长比分别为1.00~1.20 g/cm和0.90~1.00 g/cm;剑叶一侧进行剪叶和粘叶处理后Q优6号粒重叶长比有所下降,准两优527粒重叶长比有所上升。粗糙侧SPAD值环比增长率绝对值较光滑侧高,处理光滑侧较处理粗糙侧具有更高的SPAD值变化。整体比较,水稻剑叶光滑侧对籽粒产量的贡献高于粗糙侧。

关键词: 剑叶, 籽粒产量, 光滑侧, 粗糙侧, SPAD值

Abstract:

 In order to compare the effects of two sides (smooth side and rough side) of flag leaf on grain yield of rice, the authors set up five treatments(cutting smooth side away from 2 cm leaf cushion, cutting rough side away from leaf cushion 2 cm, sticking 10 cm on the middle of smooth side, sticking 10 cm on the middle of rough side, and CK)by the method of cutting and sticking flag leaf, using Q you 6 and Zhunliangyou 527 as materials with three nitrogen levels, and analyzed their total grain weight, ratio of grain weight and leaf length, 1000-grain weight, seed setting rate, and change of SPAD value. The results showed that, the total grain weight of cutting or sticking smooth side was lower than cutting or sticking rough side, but there was no significant difference on total grain weight, 1000-grain weight, grain number per panicle,  seed setting rate of this treatment under the same rice variety and nitrogen level. The ratio of grain weight and leaf length of Q you 6 and Zhunliangyou 527 was 1.00~1.20 g/cm and 0.90~1.00 g/cm, respectively. The ratio of grain weight and leaf length treatment of cutting and sticking a side of flag leaf was lower than blank control in Q you 6, and that was higher in Zhunliangyou 527. The absolute value of chain growth rate of SPAD value of rough side was greater than that of smooth side, and some situation that of cutting or sticking smooth side was higher than cutting or sticking rough side. Generally, the contribution of smooth side of flag leaf on grain yield was higher than that of rough side in rice.

Key words: flag leaf, grain yield, smooth side, rough side, SPAD value 

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