Study on the Effects of Different Treatments on Mechanical Harvest Broken Rate of Maize Grains
In order to study the effects of different treatments on the main grain broken rate,analyze the relationship between the grain broken rate of laboratory and actual machine harvest,and explore a convenient way to test the broken rate,the experimental settings including varieties,nitrogen application rate,sowing date and harvest period,and the broken rate under different pore size sieves of indoor ground grains were studied respectively,and the curve of the broken rate in mechanical harvesting process was simulated.The results showed that there were obvious differences of grain broken rate between different varieties,nitrogen application rates,sowing dates and harvest dates,and the selection of grain type keratin,25％reduction in nitrogen and appropriate postponement of harvest date could improve the broken resistance of grains.The moisture content and the broken rate at the time of mechanical harvesting had a quadratic relationship,when the moisture content was 21.95％,the lowest broken rate was 4.32％,and the moisture content and the broken rate calculated by the sieve with a grinding pore size of 2.36 mm in the laboratory had a quadratic relationship,the regression curve equation analysis showed similar result.The broken rate(2.36 mm)can be tested by indoor grinding,which mimics the broken rate of actual mechanical harvesting,thus providing a more flexible and convenient way for selecting suitable varieties for harvesting to test the grain broken rate.
MaizeGrain harvestingResistance to breakageBroken rate
NETL
NSTL
万方数据
