Abstract:

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.

Key words: Uniconazole (S-3307), Wheat, Planting density, Nitrogen distribution, Grain protein