Compared with traditional superphosphate, granulated compound fertilizer and other varieties, water-soluble fertilizer has obvious advantages. It is a quick-acting fertilizer with good water solubility and no residue. It can be completely dissolved in water and can be directly absorbed and utilized by the roots and leaves of crops. Water-soluble fertilizer is combined with micro-sprinkler irrigation and drip irrigation in facility agriculture to achieve water and fertilizer integration and achieve water-saving and fertilizer-saving efficiency. In today's increasingly scarce water resources, the application of water-soluble fertilizer has become one of the measures to increase agricultural efficiency and increase farmers' income. This article introduces seven technical points for the application of water-soluble fertilizers:
1. Avoid direct application
It is necessary to adopt secondary dilution water to dissolve the fertilizer. The nutrient content of the compound fertilizer is higher than that of the general compound fertilizer, and the dosage is relatively small. The direct application of the fertilizer is easy to cause the roots of the seedlings and the seedlings to be weak, and the secondary dilution is not only beneficial to the uniform application of the fertilizer, but also can improve the fertilizer. Utilization rate.
2, a small number of multiple applications
Because of the quick-acting effect of water-soluble fertilizer, it is difficult to remain in the soil for a long time. A small number of times is the most important fertilization principle, which is consistent with the characteristics of uninterrupted absorption of nutrients by plant roots, and reduces the leaching loss caused by one-time large-scale fertilization. Generally, the dosage per acre is 3-6 kg.
3, pay attention to nutrient balance
The water-soluble fertilizer is generally applied by pouring or spraying, or mixed into water, and applied with irrigation (drip irrigation, sprinkler irrigation). It should be reminded that when using drip irrigation, due to the dense growth and large amount of crop roots, the dependence on soil nutrient supply is reduced, and more depends on the nutrients provided by drip irrigation.
If the water soluble fertilizer formula is not balanced, it will affect crop growth. In addition, water-soluble fertilizer should not be applied with traditional irrigation methods such as flood irrigation or irrigation, to avoid fertilizer waste and uneven application.
4, with application
Water-soluble fertilizers are quick-acting fertilizers and generally can only be used as top dressings. Especially in conventional agricultural production, water-soluble fertilizer is not a substitute for other conventional fertilizers. It is necessary to combine the base fertilizer with the top dressing, the combination of organic fertilizer and inorganic fertilizer, and the combination of water soluble fertilizer and conventional fertilizer to reduce the cost and exert the advantages of various fertilizers.
5, try to use alone or mixed with non-alkaline pesticides
When vegetables are deficient in deficiency or root growth is poor, many farmers use water-soluble fertilizers to alleviate them. It is reminded that the water-soluble fertilizer should be applied as much as possible or mixed with non-alkaline pesticides, so as to prevent metal ions from reacting to produce precipitation, resulting in leaf damage or phytotoxicity.
6, avoid excessive irrigation
When the main purpose of fertilization is to irrigate, the deepening of the root layer can be achieved. Different crop root depths vary widely, and the concrete can be dug at any time to understand the specific depth of the root layer. Excessive irrigation not only wastes water, but also causes nutrients to leap below the root layer, crops cannot be absorbed, and fertilizer is wasted. In particular, urea and nitrate nitrogen fertilizers in water-soluble fertilizers (such as potassium nitrate, calcium ammonium nitrate, nitrophosphate, and water-soluble fertilizers containing nitrate nitrogen) are easily lost with water.
7, to prevent the accumulation of salt on the surface
Long-term use of drip fertigation in greenhouses or greenhouses will cause accumulation of surface salt and affect root growth. Under-film drip irrigation can be used to inhibit salt migration to the surface layer. (Uncle Uncle)
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