烯效唑对不同种植密度小麦后期氮素分配及籽粒蛋白质的影响

在不同种植密度下，研究了烯效唑（S-3307）干拌种浓度对冬小麦生育后期叶、茎和穗中氮含量及籽粒品质的影响。结果表明，烯效唑提高了小麦生育后期叶、茎和穗中的含氮量，且对主茎的影响大于分蘖，随其拌种浓度的增加，冬小麦籽粒蛋白质含量加大。烯效唑改善了籽粒中蛋白质的组分，对清蛋白、球蛋白的含量及其和均以20 mg/kg拌种处理效果最好，随其拌种浓度的升高，对醇溶蛋白和麦谷蛋白含量及其和的影响越明显。烯效唑通过对氮源的调控而对蛋白质进行了调控。

Effects of Uniconazole on Nitrogen Distribution and Grain Protein at Late Growing Stage of Wheat with Different Planting Densities

The experiment was conducted with seed dressing of uniconazole (S-3307) with different concentrations (0, 10, 20 and 40 mg/kg) and different planting densities(90×10⁴,180×10⁴ and 270×104/ha) in late growing stage of wheat Mianyang 26（cv）. The results showed that the contents of nitrogen accumulated in ear, culm and leaf were more in S-3307 treatments than in control, and the effect of S-3307 on main stem was bigger than that on tiller. The grain protein was significantly higher in S-3307 treatments than in control. With the increase of S-3307 concentration, the contents of albumin and globulin were significantly increased, which the effect of 20 mg/kg S-3307 (B3) was the best, and the contents of gliadin and glutenin also increased. It suggested that the grain protein is regulated through nitrogen source regulation by S-3307.