The way to improve the quality of the application of lime fertilizers

Abstract

The article presents some results of comparative tests conducted at the N.P. Ogarev Mordovia State University of the unit when introducing pulverized calcareous fertilizers with serial and experimental centrifugal working body. The influence of the uneven distribution of fertilizers along the width of the capture unit was obtained. The observations showed that upon mechanical spreading (for example, a centrifugal disk) of fertilizers with different particle size characteristics, large particles fly further under the influence of the initial velocity acquired during the falling of the disk, and small (dusty) particles fall on the soil near the center of the disk. Therefore, it is proposed to use a differential feed, both mechanical and pneumatic, for the introduction of ameliorants. Many studies examine in detail the influence of kinetic energy on a fertilizer particle when it leaves the centrifugal working body, and there is insufficient research on the influence of the kinetic energy of an inclined air flow on the additional dispersal of dispersed particles and on the uniformity of their application. To test this hypothesis, the experiments to determine the uneven distribution of fertilizers along the width of the aggregate when introduced by the experimental and serial working body were conducted. For experiments, the base model of the MVU-6 spreader was taken. On this machine, a pneumocentrifugal working body developed by authors was installed in place of the serial working body. As experiments showed, the experimental working body allowed to increase the width of the capture from 6 to 10 m and reduce the uneven distribution of calcareous ameliorants on the total width of the capture from 45,0 to 25,0 %. Overlapping adjacent passages for the experimental setup with half or more of the total working width allows to obtain uniform distribution up to ± 25 %, and an increase in the working speed from 1,5 to 2,0 m/s at a working width of 8 m leads to a deterioration in the uniform distribution of fertilizers on the surface of the field.