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Many vegetable farmers in the process of watering and fertilizing vegetables, is a fertilizer for a fertilizer, their thoughts: so many fertilizers, this does not work, that still works. Changing the type of fertilization sometimes does a good job, but don't change it frequently. The following small series will introduce the hazards of frequent replacement of fertilization.
For water-soluble fertilizers, the nutrition is relatively high and comprehensive, but some problems should be paid attention to when applying. Today, we will introduce the problems that should be paid attention to when applying water-soluble fertilizers.
Problems to be paid attention to in the application of water-soluble fertilizers:
One. Pay attention to nutrient balance. Water soluble fertilizers are usually applied, drenched or applied by irrigation equipment. Especially under drip fertigation conditions, the roots grow densely and in large quantities. At this time, the dependence on soil nutrient supply is reduced, and more depends on the nutrients provided by drip irrigation. There is a higher requirement for a reasonable proportion and concentration of nutrients. If the formula is not balanced, it will affect crop growth. Especially on sandy soils, there are serious consequences.
two. Choose fertilizer based on irrigation facilities. One indicator for measuring the quality of water soluble fertilizers is called “water insoluble content”. Generally, drip irrigation requires less than 0.2% water insoluble matter, less than 5% of microspray irrigation insoluble matter, and less than 15% insoluble water in sprinkler irrigation. Leaching requirements are relatively lower. Generally, the lower the water insoluble content, the more expensive the fertilizer.
three. Apply in small amounts multiple times. This is the most important fertilization principle for water-soluble fertilizers, which is consistent with the characteristics of uninterrupted absorption of nutrients by plant roots, reducing the leaching loss caused by one-time large-scale fertilization. A small amount of multiple application is the most important reason for the high utilization rate of water-soluble fertilizer. Generally, the amount per acre is 3-6 kg.
four. Safe to apply. Preventing the burning of leaves and roots of fertilizers, especially sprinkler irrigation and micro-sprinkler fertilization, is prone to leaf burning. Usually, the EC value of the fertilizer solution is controlled at 1-3 mS/cm, or 1-3 kg per water, which is equivalent to 350-1000 times dilution; or spray water once after spraying the fertilizer. It is also necessary to prevent excessive concentration of burned roots when pouring. The safest method of production is to use a small amount of fertilizer to test and find that the concentration is reduced when there is damage to the blade. It is a viable option to buy a hand-held conductivity meter for some large growers to monitor the fertilizer concentration, especially for areas with high water source salinity.
The problem to be paid attention to when applying water-soluble fertilizer is introduced here. I believe everyone will understand it after reading it.
