1. What is water-soluble fertilizer?
1. Water-soluble fertilizer refers to a compound fertilizer containing nitrogen, phosphorus, potassium, calcium, magnesium, trace elements, amino acids, humic acid, alginic acid and other substances that can be completely dissolved in water.
2. Water-soluble fertilizer is a quick-acting fertilizer that can be quickly dissolved in water, has no residue, and can be directly absorbed and utilized by the roots and leaves of crops.
3. Water-soluble fertilizer can be used in facility agriculture such as sprinkler and drip irrigation to achieve the integration of water and fertilizer. The effective absorption rate is more than twice that of ordinary chemical fertilizers, and the fertilizer effect is fast, which can solve the nutrient needs of high-yielding crops during the rapid growth period.
4. The water requirement of the sprinkler and drip irrigation system is only 30% of that of ordinary chemical fertilizers, and the fertilization operation requires almost no labor, which greatly saves costs.
5. Water-soluble fertilizers usually have less impurities and low conductivity. They are very convenient to adjust the concentration and are safe for seedlings.
2. How to use water-soluble fertilizer
1. Choose fertilizers according to irrigation facilities
(1) Generally, drip irrigation requires water-insoluble matter content to be less than 0.2%, micro-sprinkler irrigation water-insoluble matter content is less than 5%, sprinkler irrigation water-insoluble matter content is less than 15%, and drip irrigation requirements are even lower.
(2) Generally, the lower the water-insoluble content of macroelement water-soluble fertilizers, the better the fertilizer efficiency and the higher the relative fertilizer price.
2. Prevent direct flushing
The secondary dilution method should be adopted to reduce the leaching loss caused by large-scale fertilization at one time. The appropriate dosage of water-soluble fertilizer per mu is 3-6 kg each time.
3. Grasp the details of drip irrigation and fertilization
When drip irrigation and fertilization, drip clean water first, and then start fertilizing after the pipe is filled with water.
4. Avoid excessive irrigation
It is usually sufficient to keep the soil moist within a depth of 20-40 cm.
5. About mixed use
Use it alone or mix it with non-alkaline pesticides as much as possible to prevent metal ions from reacting and precipitating, causing leaf fertilizer damage or phytotoxicity damage.
6. Pay attention to nutritional balance
If the water-soluble fertilizer formula is unbalanced, it will affect crop growth. When selecting fertilizers, it should be used together with trace element water-soluble fertilizers.
7. Avoid accumulation of salt on the surface
Long-term use of drip irrigation and fertilization in greenhouses or greenhouses will cause surface salt accumulation and affect root growth. Drip irrigation under the film can be used to inhibit salt migration to the surface.
8. Precautions for use
(1) Water-soluble fertilizer is easily diluted by water, so do not use it before it rains. If it rains after use, you need to fertilize again within 6 hours after the rain stops.
(2) Before each use of water-soluble fertilizer, it needs to be used according to the specific growth conditions of the crops. It is best not to use water-soluble fertilizer during sowing.
3. What are the advantages of water-soluble fertilizers?
1. Good effect
(1) Water-soluble fertilizers are applied with water and are absorbed quickly by plants. Usually, the fertilizer applied will be partially absorbed and utilized within 24 hours.
(2) Because there is sufficient water, the fertilizer will be absorbed quite completely, and the fertilizer utilization rate is high and the effect is good.
2. The application method of water-soluble fertilizer is simple
There is no need for the complicated operation of mechanical hole application, nor the labor of foliar spraying. It only needs to be watered with water, which is convenient and fast.
3. Use fertilizer evenly
(1) Mechanical hole fertilizer has high local fertilizer concentration, which can easily cause "seedling burning", or cause excessive nutrients in some plants and insufficient nutrients in some plants, failing to achieve the purpose of uniform use.
(2) Foliar spraying also has the problem of uneven application to varying degrees. Water-soluble fertilizer is used after all the fertilizer is dissolved in water, so the fertilizer is applied evenly to the entire farmland and to each plant.
4. High fertilizer utilization rate
(1) Fertilizer application in holes will cause fertilizer loss due to lax cover, drought and other reasons.
(2) Water-soluble fertilizer dissolves in water, enters the ground, and is absorbed by plants. Therefore, it has a large contact area with plant roots, absorbs quickly, and has a high absorption rate, which reduces the loss of fertilizer caused by plants not having time to absorb it. Therefore, it can be fertilized and utilized with water. The rate is high.
5. No damage to crops
(1) Mechanical top dressing will destroy part of the root system of the plant, affect the plant's absorption of fertilizer, and also affect the normal growth of the plant to a certain extent.
(2) Mechanical spraying and artificial spraying will cause mechanical damage to plant young stems, branches, young fruits, flowers, etc. Water-soluble fertilizers are applied with water, which is a "silent" fertilization, so it does not cause any damage to the plants.