关键词: 烯效唑, 密度, 小麦, 产量

Abstract: The effects of different S₃₃₀₇ concentrations(0, 10, 20, 40mg/kg), densities(90×10⁴, 180×10⁴, 270×10⁴hm^-2) and their interaction on wheat yield components were studied. The results show as follows. S₃₃₀₇ applied to seed increased yield significantly and 20mg/kg is the best. The different plant density treatments also significantly affect wheat yield. Moreover, the high yield is available at the composition of 180×10⁴~270×10⁴hm^-2(density) and 20mg/kg(S₃₃₀₇). Ear number per plant, grain number per ear and 1000 grain weight decrease as the density increases. Fortunately this negative effect is relaxed by medium S₃₃₀₇(20mg/kg). S₃₃₀₇ has positive effect on ear number per unit, grain number per ear and 1000 grain weight. Among S₃₃₀₇ Concentrations 20mg/kg is the best.

Key words: S₃₃₀₇, DENSITY, WHEAT, YIELD