Abstract：In order to satisfy the nutrient demand of wheat and maize, increase fertilizer utilization rate during
different growth stages, prevent fertilizer blocking, subsoiling and anti-blocking layered fertilizing shovel with fertilizer distributor was designed. The simulation analysis was made on the inclination angle of fertilizing device γ, the length of fertilizing tablets L and the vibration frequency f of fertilizer distributor. The structure of layered fertilizing shovel was optimized, and laboratory and fifield experiments were carried out. The results of simulation experiments show that when installation angle γ of the fertilizer device is 30°, the working length of the middle layer fertilizing tablets L1 is 14 mm, and that of the lower layer fertilizing tablets L2 is 29mm and the vibration frequency f is 1Hz, the proportion of fertilization in the upper, middle, lower and bottom layers is 23.3∶23.8∶31.2∶21.7 respectively. The distribution of fertilizer proportion can meet the needs of crop growth. Compared with the simulation experiments, the relative error of laboratory test is less than 5%, and the coeffificient of variation is less than 10%. The coeffificient of variation of fifield test is less than 9%.
石金杉，齐浩凯，孙富才，赵建国，赵晓顺，马志凯，李建昌，郝建军，马跃进. 深松防堵分层施肥铲优化设计与试验[J]. 河北农业大学学报, 2020, 43(5): 96-102.
SHI Jinshan, QI Haokai, SUN Fucai, ZHAO Jianguo, ZHAO Xiaoshun, MA Zhikai, LI Jianchang, HAO Jianjun, MA Yuejin. Optimization design and experiment of subsoiling and anti-blocking layered fertilizer shovel
. Journal of Hebei Agricultural University , 2020, 43(5): 96-102.
2020, Vol. 43 
