关键词: 偏置式施肥机, 搅拌施肥, 机艺融合, 桑园

Abstract: Aiming at the problems of low mechanization level and high labor intensity of fertilization in Sichuan mulberry garden, a selfpropelled bias fertilizer applicator for mulberry garden was developed by adhering to the integration of machinery and techniques. This machine is mainly composed of caterpillar chassis, transmission device, hydraulic depth adjusting device, spiral cutter and fertilizer discharging device. During the operation, the fertilizer is discharged to the ground through the fertilizer dispenser, and then mixed with the soil and covered under the stirring action of the spiral cutter. Both structural parameters and working parameters of the spiral cutter and the hydraulic depth adjusting device of the bias fertilizer applicator were determined combining with the agronomic requirements of fertilization in mulberry garden. Quadratic regression orthogonal combination test was carried out with the cutter speed, fertilizer discharge rate and traveling speed as the test factors, and fertilizer coverage rate as the evaluation index. The results showed that the significance of the influence of fertilizer coverage rate was in the descending order of the cutter speed, the traveling speed and the fertilizer discharge rate. After optimization, the maximum value of theoretical fertilizer coverage rate reached 882% with the cutter speed of 320 r/min, the fertilizer discharge rate of 57 g/m and the traveling speed of 0.32 km/h. The results of field experiment showed that under the condition of optimized combination parameters, the fertilizer coverage rate was 88%. The verification test results are in good agreement with the theoretical optimization value, which can effectively guide the actual production and provide a sound reference for the theoretical design and experimental verification in the mulberry fertilizer applicator.

Key words: bias fertilizer applicator, stirring fertilization, integration of machinery and techniques, mulberry garden