Since 1998, Shandong Liangyi Farm has been utilizing the 2BQM-6A corn no-tillage precision seeder to implement and promote advanced no-tillage sowing techniques. Over the years, the farm has accumulated practical experience, which is now summarized below for reference.
First, to ensure uniform seed spacing and straight seeding lines—both of which are crucial for efficient field management—a custom marker was developed. Long-term markers were installed in the fields to guide the sowing process accurately and consistently.
Second, the presence of foreign objects on the seed trays can cause the cylinder seedlings to be cut off, leading to suction issues or unexpected machine stoppages. To address this, operators must constantly monitor the seedlings during operation, quickly identify and resolve any problems, and minimize downtime. If any seeds are missed during sowing, they should be replanted immediately to maintain planting density.
Third, one common issue is the failure of the head cylinder to pick up seeds, often due to low engine throttle and slow rotation speed at startup, resulting in insufficient negative pressure. To prevent this, the throttle should be increased when starting the machine to ensure proper seed pickup.
Fourth, the problem of sparse seedlings and low yield occurs annually. This is primarily due to excessive plant spacing. Adjustments such as increasing the number of seed holes or adjusting the sprocket ratio can help. Additionally, a low germination rate or improper sowing depth may also contribute to this issue. Seed germination should exceed 90%, and before sowing, impurities should be removed, and seeds should be soaked. The recommended sowing rate is about 38 kg per hectare, with approximately 90,000 plants per hectare, and around 67,750 to 7,500 seedlings per hectare.
Fifth, to ensure a complete and uniform stand, the farm has adopted an integrated process: after harvesting wheat, the straw is chopped and returned to the field using a combine harvester. No-tillage sowing follows, then a straw returning machine crushes the remaining stubble. Herbicides are applied, and irrigation is carried out using sprinklers. It’s important to note that chopped wheat straw not only covers the soil but also suppresses weed growth, maintains soil looseness, and helps retain moisture, thus improving drought resistance.
Lastly, common malfunctions of this model include: one row of seed disks failing to pick up seeds, which may be due to low rotation speed or blockage by debris; the intermediate shaft breaking, usually caused by a tight belt; the knife not being properly buried or breaking due to wear or looseness; and disc openers failing to rotate, typically because of poor bearing conditions. These issues require regular inspection, lubrication, and adjustment to ensure smooth operation.
Through continuous practice and refinement, the farm has significantly improved its no-tillage sowing efficiency and crop yields.
Whitening Ingredient
Whitening supplements usually refer to nutritional supplements or food ingredients that can help improve uneven skin tone, reduce dark spots, and enhance skin brightness, thus achieving whitening effects. These components usually work by antioxidants, inhibiting melanin production, promoting melanin breakdown, or accelerating epidermal metabolism.
Here are some common whitening supplements:
1. Vitamin C (Ascorbic acid)
A powerful antioxidant, can inhibit tyrosinase activity, reduce melanin production, while promoting collagen synthesis, improve skin quality.
2. Glutathione
It is an endogenous antioxidant that can be used orally or topically to help reduce pigmentation and improve skin brightness.
3. Niacinamide (vitamin B3)
It can prevent the transfer of melanin to the skin surface, reduce the formation of stains, and has anti-inflammatory and moisturizing effects, improve skin barrier function.
4. Lipoic acid
A powerful antioxidant that can work with other antioxidants such as vitamins C and E to enhance the whitening effect.
5. Arbutin
Natural extract, can inhibit tyrosinase activity, reduce melanin production, commonly found in whitening skin care products.
6. Polyphenols (such as green tea extract, grape seed extract)
With antioxidant properties, can prevent skin damage caused by ultraviolet light, indirectly help whitening.
7. Collagen peptide
Although the direct whitening effect is limited, it can improve the elasticity and water retention of the skin, making the skin look fuller and brighter.
It is important to note that the effectiveness of whitening supplements varies from person to person, and usually requires a combination of good sun protection and reasonable lifestyle habits (such as adequate sleep, balanced diet, moderate exercise) to achieve the best results. When choosing a whitening supplement, it is recommended to consult a professional to ensure safety and suitability.
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