(1) Inspection of technical status
Before the seeder is working in the ground, it is necessary to check whether the various components are deformed, whether the fasteners are loose, whether the fastening, transmission, cultivation, and adjustment system are flexible, and whether the double disc opener and the opener landing mechanism are deformed.
(2) Adjustment of line spacing, broadcast quantity, and marker
The line spacing is determined according to the technical requirements of agricultural production. The number of openers that can be installed can be calculated as follows:
n=L is valid / b+1
L effective: opener mounting frame effective beam length b: line spacing
If the calculated opener is singular, the middle opener is installed in the middle of the opener mount; if it is a double number, it is symmetrically installed on both sides with the center of the mount as the center of symmetry.
When the transmission speed ratio is fixed, the seeding amount can be changed by changing the working length of the seeding pulley with the broadcast amount adjustment handle. The larger the length of the trough into the seed box, the larger the sowing amount; otherwise, the smaller. According to the requirements of agriculture and production, the actual seeding amount q can be calculated as follows:
q=Acreage amount (kg/mu)×π×plant wheel diameter (m)×the number of turns of the ground wheel×row spacing (m) (1+ ground wheel slip coefficient)/666.7 (kg)
The specific method is to support the seeding machine so that the seed box is level, the ground wheel can rotate freely, the opener is lowered, and the seeding amount adjustment handle is placed in a suitable position. Add a fixed number of seeds, and cover the seed surface, and attach the inoculation bag under the seed tube. Then, the walking wheel is rotated 20 to 30 times at a speed similar to the actual working speed in the field, and the seed amount in each inoculation bag is respectively weighed, and compared with the actually calculated seeding amount q after recording (the actual calculation of the ground wheel slip) The coefficient is generally taken as 0.05? 0.1).
The length of the marker is calculated. In order to make the line spacing of adjacent two line spacings normal, no replay and missed broadcast, guide the tractor to drive correctly, the length of the marker L (the distance from the edge of the opener to the line of the stroke), Tractor centerline alignment trace: L=(B+b)/2
If the tractor is driving in a wrong position, the right front wheel of the tractor is often aligned with the imprint, so that the left and right stroke lengths are not equal:
L left (B+b)/2+A/2
L right (B+b)/2-A/2
B: Broadcast b: line spacing A: tractor front wheel center distance
(3) Trial broadcast
Before the seeder operation, the field trial broadcast should be carried out first, and the amount of sowing, sowing depth (by adjusting the depth of trenching of the opener), the quality of the soil covering, the adjacent row spacing, etc., should be checked and adjusted until all the requirements are met. Conduct formal seeding operations. First calculate the number of seeds to be seeded Q (kg):
Q=2 acres of sowing (kg) × broadcast (m) × length of sowing stroke (m) / 666.7
Then, add - quantitative seeds to the seed box and scrape them, make a mark, and add a seed of the round trip to the seed box for seeding. After the completion of the round-trip, check whether it is flush with the mark; if it is not, adjust the position of the adjustment handle and then test it until it meets the requirements.
(4) Inspection of seeding quality
Always check the rows of meters with the groove wheel working length template to see if there is any change. Randomly take more than 10 measuring points along the diagonal direction of the plot, check the sowing depth, and the deviation shall not exceed plus or minus 1 cm. Check the number of seeds actually planted per meter length in the broadcast, m, which can be calculated as follows:
m=mu seeding amount (kg/mu)×row spacing (m)×106/666.7 thousand grain weight (g)
After the completion of the broadcast-fixing plot and the fixed area, the area to be broadcast and the actual seeding amount and the amount of seeded sowing shall be proofread, and if it does not meet the requirements, it shall be adjusted.
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