What are the fertilizer requirements for a fertigation machine?

  1. Apply in small amounts and frequently. This is an important principle for applying water-soluble fertilizers, consistent with the characteristics of continuous nutrient absorption by plant roots, reducing leaching losses caused by applying large amounts of fertilizer at one time. Applying small amounts frequently is an important reason for the high utilization rate of water-soluble fertilizers. Generally, the amount per mu is 3-6 kg each time. Less in the seedling stage and more during the vigorous growth period.

  2. Pay attention to nutrient balance. Water-soluble fertilizers are usually applied by irrigation, spraying, or through irrigation equipment. Especially under drip irrigation conditions, the root system grows extensively and densely, and the nutrient supply to the soil is more dependent on the nutrients provided through drip irrigation, especially in sandy soils, which have higher requirements for the reasonable proportion and concentration of nutrients. If the fertilizer formula is unbalanced, it will affect crop growth and cause nutrient deficiencies.

3. Safe application. Especially for sprinkler and micro-sprinkler irrigation fertilization, care should be taken to prevent fertilizer from burning leaves and roots. Usually, the soluble salt concentration EC value of the fertilizer solution is controlled at 1-3 ms/cm, or 1-3 kg is dissolved per cubic meter of water, which is equivalent to a dilution of 350-1000 times, or a rinse with clean water after spraying fertilizer. When applying fertilizer by irrigation, it is also necessary to prevent excessive concentration from burning roots and seedlings. A safe method in production is to conduct a trial with a small amount of fertilizer. If damage to the leaves is found, reduce the concentration. Some large growers can purchase handheld conductivity meters to monitor fertilizer concentration, which is particularly suitable for areas with high salinity in the water source.

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