Distribution of rapeseed sowed by 2BFQ-6 precision planter

In order to study the distribution of rape seedlings sowed by 2BFQ-6 precision planter for rapeseed, fifty-eight samples which totally contained about 7,041 seedlings were collected using the Grid method, and statistical analysis was carried out by the methods of Curve fitting, ANOVA and Duncan multiple range test. Results indicated that the spacing of rape seedlings for each row obeyed exponential distribution whose parameters were 0.0245, 0.0296, 0.0264, 0.0294, 0.0283 and 0.0308, respectively. The range of correction coefficient for theoretical spacing was from 1.172 to 1.250. The stability of total seeding quantity for the planter was reliable. The error between the real row spacing and the theoretical row spacing was less than 5%, and the triangle expression of Fourier series could be used to analysis the stability of real row spacing. The distribution obtained from this experiment provides a basic reference for the optimization of structure and the improvement of seeding process, and it is also of great value to the operation of 2BFQ-6 precision planter.