【摘要】 采用 Dn— 31 1近似饱和最优设计三因素五水平试验 ,研究了福美砷与抗寒剂分别以不同浓度混配及不同时期喷雾对苹果树腐烂病的防治效果。研究表明 ,福美砷与抗寒剂混配后的喷雾时期是影响防效的主要因子 ,喷雾时期不同防病效果差异显著。 4月中旬及 1 1月中旬两个喷雾时期对提高防效至关重要。两因子交互效应防效≥ 80 %的最佳区域均分布在各因子编码值的 -2～ -1 .4 1 4及 1 .4 1 4～ 2之间。福美砷与抗寒剂混配使用的优化农艺措施为 :在青海省乐都地区 ,喷雾期应选在 4月中旬和 1 1月中旬 ;福美砷浓度用 5 0～ 75倍 ,抗寒剂浓度取 1 0 0～ 1 5 0倍为宜。更多还原

【Abstract】 Dn-311 similar saturated optimal design was used in experiment with 3 factors and 5 levels, Studying on the control effect of different concentration and different applied times of asomate and anti-cold preparation for apple tree canker. The results showed that the applied times of mixture of asomate and anti-cold preparation were the main factor affecting the control effect.There was a big different control effect with different applied times. It was very important for increasing the control effect to apply the mixture in the medial of april and in the medial of November. The best region of interacting control effect of ≥80% between two factors was distributed -2~-1.414 and 1.414~2 of coding value. The best agricultural measure of the mixture is, in Ledu of Qinghai Province, applied time would be in the medial of April and in the medial of November, the contents of asomate is 1∶50～75, Anti-cold preparation 1∶100～150.更多还原