Data Analysis of Leaf Structure in Threshing and Redrying by Different Testing Standards

[Objective] To discuss the differences of leaf structure index requirements in threshing and redrying by YC / T 147-2010 and YC / T 146-2001 of old and new standards.[Method] The test results of leaf structure detection tested by two screen mesh of Philip Morris and ISO were collected,and conduct difference analysis,standard deviation analysis and dispersion coefficient analysis.[Result] The results showed that there was a certain difference of the detection result of the two screen mesh.The certain difference of leaf rate in 12.7 mm,6.35 mm,2.36-6.35 mm, 2.36 mm,but the fluctuation of difference was small.The difference of leaf rate was little change in 12.7 mm,and the difference between 3%-6%.[Conclusion] The study can provide reference data for threshing and redrying technique monitoring and equipment adjusting in production process.