Mechanical Properties of Rape Seedling Pot

In view of problems of survival rate of rape pot seedling was affected by damage of seedling pot in the process of transplanting rape pot seedling，movement and mechanical properties of rape seedling pot under action of push-out seedling fixture were studied，change rules of ejecting force，motion displacement and pressure under different moisture content were explored，which could provide basis for parameters design of push-out seedling device and picking seedling mechanism of rape transplanter.Results showed that ejecting force of seedling pot was increased with raising of moisture content；as moisture content of seedling pot raised from 20.44% to 31.02%，range of motion displacement changed from 3.04～4.23 mm to 5.02～5.44 mm，pressure of seedling pot increased from 5.61 N to 7.90 N；as moisture content of seedling pot raised from 31.02% to 40.84%，range of motion displacement was almost invariant，pressure of seedling pot declined from 7.90 N to 4.83 N，with the raising of moisture content，pressure of seedling pot increased firstly and then decreased，the change was nonlinear，and pressure of seedling pot changed slightly under the same moisture content；in conclusion，when moisture content of seedling pot was about 30%，rape pot seedling was ejected easy and seedling pot was damaged less.