Planting Tips

Chapter 14 How to Diagnose and Prevent Nutrient Deficiency in Flowers
Flower nutrient deficiency, also known as deficiency disease, is one of the main contents of flower physiological diseases.The various nutrients needed for the growth and development of flowers have their unique physiological functions. Once a certain nutrient element is lacking, some functions of the plant will appear physiological disorders, and symptoms will first appear on the leaves, which is the lack of nutrient elements. disease.The symptoms of lack of different nutrient elements are different, but any deficiency will affect the normal growth and ornamental value of flowers.Therefore, flower growers need to learn to diagnose in order to carry out targeted prevention and treatment.Several common deficiency symptoms and their prevention and treatment methods are introduced below.

(1) Nitrogen-deficient leaves are light green or yellow-white, the branches are thin and weak, and the new leaves on the top tips gradually become smaller, and at the same time, they are easy to drop leaves and grow slowly.

(2) Phosphorus-deficient leaves are dark green, with yellowing between the lower veins and often purple, especially on the petioles.Germination of young shoots is delayed.The amount of flowering is small, and the root system is underdeveloped.

(3) Potassium-deficient stems are slender and soft, easy to bend and fall.The edges of the lower leaves are brown first, and necrotic spots appear from the tip downwards, and the lower leaves and old leaves are easy to fall off.

(4) Magnesium deficiency first obviously loses chlorosis between the main veins of the old leaves, and gradually spreads to the upper new leaves, the veins are still green, and various stains appear between the veins.

(5) Iron deficiency Symptoms of iron deficiency are similar to those of magnesium deficiency, the difference is that iron deficiency begins with yellowing between the veins of new leaves, and the veins are still green, and then develops into the entire leaf turning yellow or spontaneously.

(6) Manganese deficiency The symptoms of manganese deficiency are basically similar to those of iron deficiency, chlorotic spots appear between the veins and gradually form stripes, but the veins are still green.Flowers are small and poorly colored.

(7) Boron-deficient young leaves are chlorotic, the leaves are thick and shrunk, the leaf margins are curled up, the root system is underdeveloped, the terminal buds and young root growth points are dead, and the flowers and fruits are falling.

(8) Calcium-deficient terminal buds are prone to casualties, leaf tips and margins are dead, leaf margins are curled upwards and scorched, and leaf tips are often hooked.The root system has been necrotic before the above symptoms appear.

(9) Sulphur-deficient leaves turn light green or even white, spreading to new leaves, leaves are slender, plants are short, and flowering is delayed. (10) The internodes of zinc-deficient plants shrank significantly, the leaves turned yellow and smaller, yellow spots appeared between the veins, and spread to new leaves, young leaves were hard and small, and yellowed and albino.

(11) The young leaves are yellow-green due to aluminum deficiency, and the leaves become chlorotic and fall, resulting in necrosis.

(12) The growth of copper-deficient leaves is deformed, the tips of the leaves are whitish, the young leaves are shrunken, and white spots appear.There are many reasons for the deficiency, such as the lack or imbalance of certain nutrients; the soil is too acidic and too alkaline, which makes some nutrients in the soil invalid; the physical and chemical properties of the soil are poor, and the potential fertility of the soil cannot be exerted, which hinders the absorption of nutrients. etc.

The prevention and treatment method should suit the remedy to the case and take different measures respectively.

(1) Physiological disorders should be resolved in time by improving management and changing the environment.

(2) Change pots on time, apply enough base fertilizer, add hoof slices, decomposed cakes, chicken manure, etc., and replace with humus-rich pot soil. (3) According to the symptoms of deficiency, infer which nutrient element is lacking, and then select the element and add water to make a solution with a certain concentration, and then topdress the roots.

(4) Add decomposed organic fertilizers to improve the physical and chemical properties of the soil and exert the potential fertility of the soil.

(5) Use all-element compound fertilizer.But be sure to buy finished products with the factory name, brand name and description of ingredients.

(End of this chapter)