干旱区生态环境知识资源中心

Irrational use of land such as uncontrolled cattle grazing leads to desertification of vast areas. This situation needs to be addressed by integrated actions, including development of technologies to recovery of fodder lands by undersowing seeds of crops such as Kochia prostrata, Agropyron cristatum and others. The specific character of these crops is poor flowability as a result of low quality planting. The modern grass drills do not provide requirements for non-uniformity of seeding between individual apparatus and general instability of seeding. With the method of seeding consisting in forced delivery of seeds with spirals left and right winding to a booster, supply of the seed material is forced to the coils and into the throwing drill tube. A device for performing the proposed method of seeding comprises a hopper shaft with right and left spirals winding, boosters, located at the sides and in the middle part of the hopper above the coils. Based on the research results, the parameters and modes of operation of the transporting spiral organs are: diameter of the spirals -64 mm, wire diameter -4 mm, extreme pitch helix -18 mm, helix pitch medium - 10 mm, rotational frequency of the coils - 0.333; 0.266; 0.200; 0.133 s(-1). These experiments indicate that a change in the thickness of the seed layer in the hopper does not have a significant impact on the overall stability of the seed, the range of the variation coefficient of variation was 1.65 - 6.98%. Analysis of the experimental data has shown that the interaction with the opposite direction of movement of the seed flow reduces the effectiveness of the destruction of codes, so the bunker should be divided into three compartments. The results of the research are made up by regression equations establishing the dependence of the performance of the coils on the frequency of their rotation, the thickness of the seed layer in the hopper and the hopper tilt angle.