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Application technology of humic acid slow-controlled release fertilizer for corn
2024-08-27 17:18:54
1.Fertilization principle
Humic acid slow-release fertilizer is composed of humic acid compound fertilizer and slow-release nitrogen fertilizer. Activated humic acid can promote the absorption of phosphorus and potassium and improve fertilizer utilization. It is a natural growth regulator and can promote the growth of corn roots; it can Promote the formation of soil aggregate structure and regulate soil water and fertilizer conservation. Slow-controlled release nitrogen fertilizer can ensure the supply of nitrogen fertilizer throughout the growth period of corn. The combination of the two has a synergistic effect on corn fertilizer requirements.
According to the nutritional demand characteristics of corn and soil nutrient status, choose a suitable formula of humic acid slow-release fertilizer products. Choose 28-7-7, 30-5-5 and other formulas in areas with medium phosphorus and high potassium. Formulas such as 26~6~10, 28~5~7, 26~5~9, etc. are used in the medium phosphorus and medium potassium areas. Formulas such as 26~8~10, 26~10~12 are used. Various localities can also add required trace elements to the above formulas in a targeted manner according to the lack of trace elements. The release period of slow-controlled release fertilizers is generally 2 to 3 months.
2.Sowing and fertilizing
Use a corn seed and fertilizer co-seeder to sow seeds and humic acid slow-release fertilizer into the soil at one time to improve the accuracy of sowing and fertilization, and improve farming efficiency. The seed dosage is 2.5kg~3kg.
The reference dosage of slow-release fertilizer is: 60kg for a plot with a yield of about 700kg per mu, 50kg for a plot with a yield of about 600kg per mu, and 40kg for a plot with a yield of about 500kg.
Before sowing, adjust the horizontal distance between the seed legs and fertilizer legs of the seed and fertilizer co-seeder by 5 to 8 cm. The depth of the fertilizer legs is 3 to 5 cm deeper than the depth of the seed legs. Make the covering soil of corn seeds about 3cm to 5cm, the lateral spacing of seed fertilizers to be 5cm to 8cm, and the humic acid slow-release fertilizer to be 3cm to 5cm deeper than the seeds. Separate the seeds and fertilizers by 7cm to 10cm to prevent seedlings from burning. After humic acid slow-release fertilizer is applied to the soil as a seed fertilizer, top dressing is generally not required throughout the growth period.
