Foliar fertilization technology for garden flowers and trees

Foliar fertilization has the characteristics of less fertilizer, quick absorption, strong pertinence, obvious effect, etc. It has positive effects on enhancing flower and tree potential, promoting flower color, preventing deficiency, improving wintering and cold resistance, and resistance to diseases and insects. The role. It is also the main method to increase the trace elements in flowers and trees.

First, foliar fertilization period: flowering foliar fertilization is generally carried out in several stages such as pre-flowering, strong fruiting, and wintering. Fertilization in each period is once every 7-10 days, 2-3 times in a row. In the vegetative growth period, more nitrogen and potassium fertilizers should be applied. During the flower bud formation period and the strong fruit period, more phosphorus fertilizer should be applied. Different fertilizers have different spraying effects in different periods. For example, phosphate fertilizer and zinc fertilizer should be sprayed at the initial flowering stage, while molybdenum fertilizer selection has better effect before spraying.

Second, the type of fertilizer: to make the flowers of the ornamental flowers large, the fruit of the fruit and fruit, the first to meet their requirements for the three basic nutrients of NPK, but also can not lack other trace elements --- --- Calcium, magnesium, sulfur, iron, zinc, boron, molybdenum, copper, manganese. Commonly used foliar fertilizers: urea, potassium dihydrogen phosphate, ammonium phosphate, potassium phosphate, ferrous sulfate, calcium phosphate, magnesium sulfate, zinc sulfate, boric acid, ammonium molybdate, copper sulfate, manganese sulfate, and the like.

Third, the symptoms of flower and wood deficiency: To determine which fertilizer to spray flowers and trees, we must first determine which nutrients are lacking in flowers and trees, so that we can achieve the right medicine and play a very good effect.

Here are some of the symptoms of the symptoms of flowers and trees:

Symptoms of nitrogen deficiency: the plants are thin, the leaves are yellow-green, the branches are slender and hard, the flowers and trees are weak, and the growth rate is slow;

Symptoms of Phosphorus Deficiency: The color of the leaves of the flowers is changed from dark green to light green and then to copper. When the leaves are small and scarce, the leaves are scorched, the veins are yellow and purple, the flower buds are difficult to form, and the flowering is small and the flowers are light. The fruit is poorly developed and the fruit is severely damaged.

Symptoms of potassium deficiency: the plants are short, the stems are soft and easy to fall, the leaves are wrinkled, the old leaves usually have brown spots on the leaves, the leaves are yellow, the middle leaves and veins are green, and the fruits become thin and thin.

Symptoms of calcium deficiency: tender green leaves and wrinkles, new leaves are not easy to expand or ill-displaced, the leaves from the edge of the leaves to the veins between the leaves, the leaves of the yellow area of ​​the rot, the fruit is small and deformed.

Symptoms of iron deficiency: The new leaves are thinner, from the veins to yellowing until the whole leaves, the roots are not developed properly, and the shoots and fruits are pale.

Symptoms of magnesium deficiency: Mature leaves begin to chlorotic from the parallel of the midrib and gradually expand. When severe, the leaves are deciduous and the fruit is pale.

Symptoms of boron deficiency: The leaf stalk of the new leaf has water-stained spots, which are translucent, with serious falling flowers and fruit falling, and mature fruit has deformity.

Symptoms of sulphur deficiency: Yellow leaves of new leaves, especially small leaves, severely deformed, fruit deformed, and thick.

4. Foliar spray concentration: When fertilizing flowers and trees, pay attention to different fertilizers to prepare different concentrations. Urea: 0.2-0.5%, dihydrogen phosphate

Potassium 0.3-0.5%, superphosphate 0.5-1.0%, magnesium sulfate 0.2%, potassium sulfate 0.05-0.5%, zinc sulfate 0.5-1.0%, boric acid 0.1-0.2%

Ammonium molybdate 0.01%, copper sulfate 0.01-0.02%, manganese sulfate 0.05-0.01%. Regardless of the fertilizer, the spray concentration is generally below 0.5%. It should be avoided to avoid the phenomenon that the concentration is too large, which may cause the burns of flowers and trees, but the amount of medicine is insufficient, the fertilizer efficiency is not good, and the effect is not good.

5. Foliar fertilization site of flowers and trees: When fertilizing, it is best to spray the drug on the back of the leaf so that the drug can be absorbed into the pores and easily absorbed. Foliar fertilization should be applied to the periphery of the flower tree canopy, and the inner lychee leaves of the tree should be sprayed, and the upper, lower and outer leaves should be sprayed. In addition, it is also necessary to pay attention to spray spray, spray fine, and atomize well, in order to receive good results.

Sixth, foliar spray application period: fertilizer should be absorbed in time, all, and temperature, humidity and weather conditions are related. When the temperature is between 18-25 °C, the stomata of the blade will be fully opened. At this time, fertilization will greatly improve the fertilizer efficiency; when the temperature exceeds 30 °C, the stomata of the blade will be closed, and the sprayed fertilizer will be difficult to be absorbed by the blade. When spraying, it is not allowed to cause phytotoxicity; when the air humidity is high, the fertilizer liquid stays on the leaves for a long time, and the absorbed nutrients are more; when the air humidity is small, the fertilization is not easily absorbed by the leaves. Therefore, foliar fertilization is generally carried out on a sunny or cloudy day without wind. It is best to spray the best in the morning or evening. When the leaves are foggy, the leaves should be sprayed with water after drying. Strong light, windy weather and spray before the rain.

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