Foliar fertilization technique of potted flowers

Foliar fertilization of flowers, also known as extra-root fertilization, is a fertilization method in which the diluent of chemical fertilizers or trace elements is sprayed on the leaves of flower plants and absorbed by the plants through leaf stomata. Using the technology of extra-root fertilization, it will not be fixed by the soil after fertilization, nor affected by the absorption function of the root system; its advantages are less fertilizer consumption, rapid absorption and remarkable fertilizer efficiency.

1. Suitable period of fertilization

① is usually applied during the peak period of flower growth or when the plant is lack of certain elements, and fertilization can be carried out except at the flowering stage.

② chooses sunny and windless days, and it is appropriate to spray it in the morning or evening, because there is often dew on the leaves in the morning and evening, and the fertilizer liquid is easy to be absorbed.

③ foliar fertilization should spray more on the back of the leaf, because the back of the leaf has many stomata and the absorption effect is good.

④ extra-root fertilization can be combined with pest control and pest control, mixed with pesticides to achieve the purpose of pest control.

two。 Fertilization concentration

The suitable concentration of ① fertilizer solution is 0.1% Mel 0.5%. If the concentration is too high, it will "burn" the leaves.

② foliar fertilization is applied once every 7-10 days, and can be absorbed in 5 hours after fertilization. The absorption can reach 50% Mel 70% within 24 hours, and the fertilizer effect can last 7-10 days.

3. Common foliar Fertilizer for Flowers and its Application Technology

① humic acid foliar fertilizer, such as Yemanbao, etc.

② urea. It is the neutral fertilizer with the highest nitrogen content, and it is safer to spray concentration less than or equal to 1%.

③ potassium dihydrogen phosphate. The appropriate spraying concentration is 0.1% Mel 0.5%; from the beginning of flower bud differentiation to bud appearance, extra-root fertilization can be carried out, which is conducive to flower bud differentiation, and can support large flowers and bright colors.

④ superphosphate. The suitable concentration of spraying is 0.5% of 1%; it can make the leaves of the plant green, the flowers bloom brightly, and bloom ahead of time; promote the growth of bulbous flowers, and the bulbs are large and full. From the beginning of flower bud differentiation to bud appearance, extra-root fertilization can be carried out, which is beneficial to flower bud differentiation, and can support large flowers and bright colors.

⑤ ferrous sulfate, also known as black alum. Containing iron, sulfur and other trace elements, it is appropriate to spray 0.2% Mel 0.5%; for flowers in acid-loving soil, such as rhododendron, camellia, gardenia, Michelia, etc., if iron deficiency yellowing and lobular symptoms occur, the effect is very good.

4. Note ① flowers foliar fertilization, the concentration is not too high, otherwise it will "burn" the foliar. When ② was sprayed in cloudy and rainy weather, the fertilizer effect was greatly affected. ③ should not be used in windy weather or in the hot sun to avoid fertilizer damage.