Abstract: In order to find suitable sowing depths for maize varieties under no-tillage conditions in Debao,Zhengda 619,Dika 008 and Yumeitou105 were used as experimental materials to study the effects of different sowing depths on growth period,emergence rate,lodging resistance rate,plant traits,panicle traits and yield of maize. The results showed that under the condition of loose soil,the influence of different sowing depths on growth period,emergence rate,lodging resistance rate and plant traits was small,and the difference was not significant. Some panicle traits were influenced by different sowing depths,which varied among different varieties. The optimum sowing depths of Zhengda 619,Dika 008 and Yumeitou 105 were 12 cm,5 cm and 12 cm,respectively. And the range of suitable sowing depth was 5~15 cm.

Key words: maize（Zea mays L.）, no-tillage, sowing depth, yield