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作 者 ：马新明,王小纯,王志强

期 刊 ：生态学报 2003年 23卷 12期 页码：2587~2593

关键词：氮素形态；专用型小麦；光合特性；穗部性状；

Keywords:nitrogen forms, wheat cultivars with specialized end-uses, photosynthetic characters, spike,

摘 要 ：采用盆栽的方法研究了氮素形态对不同专用型小麦生育后期光合特性及穗部性状的影响 ,结果表明 :强筋型豫麦 34在硝态氮处理下 ,生育后期衰老延缓 ,旗叶保持较高的光合速率、PS 活性 ( Fv/Fo)、PS 最大光能转换效率 ( Fv/Fm)、实际光化学效率 (PS )和光化学猝灭系数 ( q P)较高 ,非光化学猝灭系数( q N)降低 ,发生光抑制的可能性较小 ,穗部性状较好 ,穗粒重最高。中筋型豫麦 49和弱筋型豫麦 5 0在酰胺态氮处理下 ,光合和荧光参数较优 ,穗粒重较高 ,有利于实现高产。

Abstract:In order to understand the mechanism of the effect of different forms of nitrogen on photosynthesis and spike development in wheat cultivars with specialized end-uses. Pot experiments were carried out at Henan Agricultural University Research Station during 2000~2002. Soil containing 9.8 (g/kg) organic matter, 0.986 g/kg total N, 25.43 mg/kg olsen-P and 259 mg/kg NH_4OAc-K was used in the experiments. 18 kg of sieved soil was placed in each 30 cm×40 cm pot. Cultivars used in experiments were Yumai 34 (a str...

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