Design and experiment of physical-chemical synergy sleep breaking machine for sainfoin seeds
[Objective]The dormancy phenomenon caused by seed hardness will lead to late germination or no germination of seeds,which will affect the regionalized and specialized production of seeds.As a typical solid leguminous forage grass seed,sainfoin seed has a high dormancy rate.This study aims to to relieve seed dormancy,improve its germination rate,and make the seeds grow strong.[Method]In this study,the method of physical-chemical synergy sleep breaking was adopted,and a sleep breaker combining double-roller extrusion friction and chemical liquid immersion was designed to realize the collaborative operation of physical-chemical sleep breaking methods.Taking the seed germination rate as the experimental index,the physical-chemical combination test was conducted to determine the influencing factors of seed germination,and the feasibility of the physical-chemical method to break sleep was verified.EDEM,ANSYS and Design-Expert analysis software were used to analyze the factors affecting the germination rate in the order of grinding roll roughness,soaking time,grinding gap,grinding roll speed and soaking solution concentration.[Result]The optimal working parameters were as follows:grinding gap 2.5 mm,grinding roller speed 1.4 m/s,grinding roller roughness 200 mesh,immersion liquid concentration 15%,and immersion time 90 min.[Conclusion]The average germination rate of A.chinensis treated with physical-chemical synergy sleep breaker is 93.18%,which is consistent with the optimization results of the fitting function and proves the reliability and efficiency of physical-chemical synergy sleep breaking.
国家科技期刊平台
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