1. What is the best way to use foliar fertilizer for flowers
Most flowers can be fertilized by foliar fertilization. It has the advantages of strong pertinence, etc. It has a very powerful effect on enhancing tree vigor, promoting large and colorful flowers, correcting deficiency symptoms, and improving winter cold resistance and pest resistance. leaven.
Generally speaking, it is better to use nutrients or compound liquid fertilizers containing nitrogen, phosphorus, potassium, iron, zinc and other elements for flower foliar fertilizers. There are also some differences in foliar fertilizers applied at different times:
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1. The vegetative growth period of flowers
The period from the germination of flower seeds to the formation of flower buds is called the vegetative growth stage. Plants need nitrogen fertilizer for vegetative growth. Nitrogen fertilizer is an important material basis for the growth of flower seedlings. With sufficient nitrogen fertilizer, after the seeds germinate, the growth is fast and robust, and the leaves are dark green. Lack of nitrogen fertilizer, the plants are pale yellow and lose their dark green, and the plants are short and thin. Foliar spraying nitrogen fertilizer is a problem to supplement nitrogen deficiency or too little nitrogen fertilizer. Generally, urea is the most common foliar nitrogen fertilizer. The amount used is between 1% and 4%, and the concentration cannot exceed 5%. Otherwise, it will burn the leaves of flowers and cause yellow withered or withered edges.
2. Flower reproductive growth period
The period between flower bud differentiation and fruit maturity is called the reproductive growth of flower. The reproductive growth of plants requires phosphorus, potassium, and boron fertilizers. At this stage, the use of phosphorus, potassium and boron fertilizers for flowers can effectively promote the physiological differentiation of flower buds, morphological differentiation, the formation of flower buds, the opening of flowers, and the formation and maturation of seeds. Without or lack of phosphorus, potassium and boron fertilizers, reproductive growth cannot be carried out and completed smoothly. The purpose of flower cultivation is to bloom, bloom well, and bloom more, improve the ornamental quality of flowers, and prolong the flowering time. To achieve this goal, it is necessary to focus on nutritional issues during the reproductive stage. Foliar spray suitable for this stage is also phosphorus potassium boron fertilizer. For foliar spraying of flowers, potassium dihydrogen phosphate and boron fertilizer can be used. Usually, 0.2% potassium dihydrogen phosphate and 0.1% boron fertilizer solution are used for foliar spraying.
Second, the appropriate concentration of foliar fertilizer for flowers
When foliar fertilizer is applied to flowers, the speed and The number depends on the concentration. If the concentration is too small, the effect will not be obvious; if the concentration is too large, the foliage will be damaged.
The concentration of foliar fertilizer for flowers should generally be controlled below 0.5%. For those with more impurities, the concentration should be controlled below 0.3% to prevent fertilizer damage. The specific concentration depends on the type of foliar fertilizer. The following are commonly used reference concentrations of foliar fertilizers for flowers: 0.2%-0.5% urea, 0.3%-0.5% potassium dihydrogen phosphate, 0.5%-1% superphosphate, 0.2% magnesium sulfate, 0.05% potassium sulfate %-0.1%, ferrous sulfate 0.2%-0.5%, zinc sulfate 0.5%-1%, boric acid 0.1%-0.2%, ammonium molybdate or sodium molybdate 0.01%, copper sulfate 0.01%-0.02 %, manganese sulfate is 0.05%-0.1%.
Three, are any flowers suitable for spraying foliar fertilizer?
Generally, most flowers can be sprayed with foliar fertilizer, but specifically , the foliar fertilizer sprayed by different flowers should be different.
Generally, dicotyledonous flowers have a larger leaf area, and some cuticles are thinner, so the solution is easy to penetrate, and the foliar fertilization effect is better, while monocotyledonous flowers are the opposite. At the same time, the nutrient absorption is related to the internal structure of the leaf surface. The upper epidermis of the leaf is denser with palisade tissue, and the back surface is sponge tissue, which is looser and has many pores, so it can absorb quickly. Therefore, the spray should be sprayed not only on the surface of the leaf, but also on the back of the leaf. Foliar fertilization is an auxiliary fertilization method. It is necessary to pay attention to applying sufficient base fertilizer and timely topdressing to meet the needs of plants for nutrients.
