Is Foliar Fertilizer Harmful to Humans and the Best Time to Spray It Explained
Foliar fertilizer is often used to make up for the situation where roots absorb insufficient nutrients, and it can also be sprayed when topdressing or supplementing nutrition. It is a fertilizer designed for foliar absorption, applying the nutrients needed by crops directly to the leaf surface. So is foliar fertilizer harmful to humans? When is the best time to spray it?
1. Is foliar fertilizer harmful to humans
A small amount of foliar fertilizer has no effect on the human body. The application method of foliar fertilizer is to dilute liquid fertilizer or water-soluble fertilizer with water and spray it onto plant leaves, so that the leaves absorb the nutrients and make up for the situation where roots absorb insufficient nutrients. It has the advantages of taking effect quickly and being simple to apply. Whether for home gardening or large-scale planting, foliar fertilizer is often applied to supplement nutrients for plants.
If you are only spraying foliar fertilizer on three or five pots of flowers indoors, the harm to the human body can be ignored and there is no need to worry. If foliar fertilizer is sprayed over a large area, odors will inevitably evaporate, which will have an adverse effect on the human body, especially when flowers in a greenhouse are sprayed in a concentrated manner, because the air in the greenhouse is not circulating, which will have an adverse effect on the human body. However, as long as you take care not to stay there for a long time and maintain a well-ventilated environment, it will not cause harm to the human body.
2. When is the best time to spray foliar fertilizer
The spraying of foliar fertilizer needs to be determined according to the growth conditions of the plants. Different plants have different spraying times, and foliar fertilizers with different fertilizer effects also have different spraying times. In general, the spraying of foliar fertilizer, like traditional fertilization, must consider the plant's own conditions, such as dormancy, budding, flowering, fruiting and other different stages, and adopt different fertilization strategies.
Generally, for foliar fertilizer spraying, it is enough as long as the leaf surface is moist and there are dew drops on the leaf tips. Under normal circumstances, the absorption of young leaves is better than that of old leaves, and the back of the leaf is better than the front of the leaf.
3. Benefits of foliar fertilizer
1. Fast absorption: After soil fertilization, nutrients are transported over a long distance and at a slow speed, while with foliar fertilization, various nutrients can be quickly absorbed by crop leaves and directly enter the plant body from the leaves to participate in the crop's metabolism. Research shows that the speed of nutrient absorption by leaves is about 1 times faster than the speed of nutrient absorption by roots.
2. Good effect: Using the foliar fertilization method can greatly increase the nutrient elements in plants in a short time, quickly alleviate the fertilizer deficiency of crops, and thus give play to the maximum benefit of the fertilizer.
3. Saves dosage: Foliar fertilization is generally concentrated on crop leaves, so the dosage is relatively small. Usually, one-several or one-thirteen of the dosage used for soil fertilization can achieve satisfactory results.
The above is a brief introduction to foliar fertilizer by Tuliu.com. A small amount of foliar fertilizer application will not cause harm to the human body. Compared with soil fertilization, foliar fertilizer has the characteristics of fast absorption, good effect, and saved dosage. However, there is no specific standard for the application of foliar fertilizer, and different fertilization strategies should be implemented according to actual conditions.