Design and experiment of physical-chemical synergy sleep breaking machine for sainfoin seeds

作者：Shuaikang CHEN, Bugong Sun, Xiaobao ZHENG, Yuan Qi · 发表于：ACTA AGRICULTURAE UNIVERSITATIS JIANGXIENSIS · 年份：2024 · DOI：10.3724/aauj.2024093 · 研究领域：Soil Mechanics and Vehicle Dynamics、Soybean genetics and cultivation、Agricultural Engineering and Mechanization

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 r...