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Since 1998, Shandong Liangyi Farm has been using the 2BQM-6A corn no-tillage precision seeder to implement and promote new techniques in no-tillage machinery. Over the years, we have accumulated valuable experience that we would like to share here.
Firstly, to ensure straight seed broadcasting and consistent spacing for easier field management later on, we designed a special marker system. We place marker poles in the fields beforehand so that the machine can follow a precise path during sowing.
Secondly, we noticed that foreign objects on the seeding trays often caused the seedlings to be cut off, which affected the suction process and led to unexpected machine stoppages. Therefore, it's crucial for operators to constantly monitor the seedlings and quickly remove any obstructions. When missing seeds are found, they should be replanted immediately to avoid gaps in the crop.
Thirdly, the issue of poor seed pickup at the start is usually due to low engine throttle and slow rotation speed, which results in insufficient negative pressure. To prevent this, the throttle should be increased before starting the machine to ensure proper seed suction.
Fourthly, every year, some areas suffer from sparse planting and low yield. After analysis, we found that the main causes were either excessive plant spacing or low germination rates. Adjustments can be made by increasing the number of seed holes and adjusting the sprocket ratio. Additionally, the germination rate should be over 90%, and seeds should be cleaned, soaked, and sown at a recommended rate of about 38 kg per hectare, with approximately 90,000 plants and 7,500–7,750 seedlings per hectare.
Fifthly, to ensure uniform seedling emergence, we have developed an effective process flow based on our field conditions. This includes using a combine harvester to chop wheat straw into the field, followed by no-tillage sowing, using a straw return machine to crush stubble, applying herbicides, and finally watering with a sprinkler system. It’s worth noting that chopped wheat stalks can be returned to the field, which helps cover the soil, suppress weed growth, keep the soil loose, and improve drought resistance.
Lastly, common faults of this model include: one row of seed disks failing to pick up seeds, which may be due to low rotation speed or debris blocking the seed plate; the intermediate shaft breaking, usually caused by a tight belt; the knife not being buried or breaking, often due to wear or looseness; and disc openers not rotating, typically because of poor bearing conditions. These issues require regular checks, lubrication, and adjustments to maintain optimal performance.
By continuously refining our practices and addressing these challenges, we have significantly improved the efficiency and success of our no-tillage sowing operations.