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不同形态的氮素 (NO- 3 和 NH+ 4 )培养对 2组产量水平相近而蛋白质含量有较大差异的 4个小麦品种幼苗叶绿素荧光特性在不同的测定光强下产生不同的影响 :低光强下 ,NH+ 4和 NO- 3 培养的幼苗 Fv/Fm在品种间和处理间均无明显差异。饱和光强下 Fv/Fm下降 ,下降程度 CK>NH+ 4 >NO- 3 ,NH+ 4 处理中的 Fv/Fm与 CK差异达到显著性水平 ;NO- 3 处理达到极显著水平 ,对同产量水平的品种来说 ,Fv/Fm下降的程度低蛋白品种高于高蛋白品种。低光强下各品种的 ΦPS CK>NH+ 4 >NO- 3 ,而强光下的变化趋势正好相反 ,NO- 3 处理的 ΦPS 最高。在这两种光强下 ,NH+ 4 处理的 ΦPS 与对照相比 ,差异达到显著性水平 ,而 NO- 3 处理达极显著水平。差异显著性分析表明 ,不同形态的氮素对光系统的影响和作用是不同的
The chlorophyll fluorescence characteristics of four wheat cultivars with different morphological nitrogen (NO-3 and NH + 4) cultivars had similar effects on the light intensities of the four wheat cultivars with similar yield but similar protein content. Low light There was no significant difference in the Fv / Fm of seedlings between NH4 + and NO- 3 cultivars. Fv / Fm decreased at saturated light intensity, and the difference between Fv / Fm and CK in CK> NH + 4> NO-3 and NH + 4 treatment reached significant level; NO-3 treatment reached extremely significant level, Varieties, Fv / Fm decline in the degree of low-protein varieties than high-protein varieties. The ΦPS CK> NH + 4> NO-3 of all cultivars with low light intensity showed the opposite trend in bright light and the highest ΦPS in NO-3 treatment. Under these two light intensities, the difference between ΦPS treated by NH + 4 and control was significant, while NO-3 treatment reached extremely significant level. Significant difference analysis showed that the effects and functions of different forms of nitrogen on the photosystem were different