烯效唑和密度对小麦产量及其构成的影响

研究了烯效唑拌种浓度和密度及其互作对小麦产量及其构成的影响。结果表明 :不同浓度烯效唑拌种对小麦有显著的增产作用 ,以 2 0mg/kg为佳 ;密度不同 ,小麦产量也有极显著差异 ;烯效唑拌种浓度和密度的互作达极显著差异 ,以中等浓度 (2 0mg/kg)和较高密度 (180× 10 4～ 2 70× 10 4hm-2 )配合最佳。随着基本苗的增加 ,单株成穗数、单穗粒数和千粒重有所下降 ,适当浓度 (2 0mg/kg)的烯效唑拌种可以缓减密度带来的负效应。烯效唑拌种对小麦单位面积穗数、穗粒数、千粒重有明显的正效应 ,以 2 0mg/kg表现最优

Effects of S3307 and Density on Wheat Yield

The effects of different S 3307 concentrations (0, 10, 20, 40mg/kg), densities (90×10 4, 180×10 4, 270×10 4hm -2 ) and their interaction on wheat yield components were studied. The results show as follows. S 3307 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 180×10 4～270×10 4hm -2 (density) and 20mg/kg (S 3307 ). 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 S 3307 (20mg/kg). S 3307 has positive effect on ear number per unit, grain number per ear and 1000 grain weight. Among S 3307 Concentrations 20mg/kg is the best.