functions of phosphorus in plants
Phosphorus is essential for any growth and other metabolism in plants. It is a catalyst substance that initiates metabolic reactions. It encourages the plant’s nitrogen use and seed formation. Phosphorus is required for seed germination, photosynthesis, and protein formation. It promotes flower, fruit and fringe root formation. It speeds up the ripening of fruits. Failure in seed formation causes the young fruit to shed and the formation of a malfunction in the fruit. In organic soils with a pH lower than 4, phosphorus binds and locks with chemical bonds in a way that the plant cannot receive.
phosphorus deficiency in plants
It must have severe phosphorus deficiencies in order to show visible symptoms, which is very rare in fruit trees. When phosphorus is low, a weak and insufficient growth is seen in the end shoots. There are abnormally dark green young leaves. The undersides of young leaves often show purplish discoloration, especially at the leaf edges and along the main veins. The leaves have a skin-like structure and an abnormal form that makes a sharp angle at the junction with the stem. Leaf symptoms are common at the beginning of the growing season and then subside throughout the season. Symptoms of phosphorus deficiency are mostly seen in young trees. Shoots and flowering are reduced. Buds burst late. Fruit set is weak and ripens early. Premature (premature) castings of fruits and flowers are seen. In order for the plant to benefit fully, phosphorus should be given close to the roots. When there is not enough zinc in the soil, giving too much phosphorus causes zinc deficiency.
The effects of large amounts of phosphorus are usually expressed as a deficiency of one or more of the basic heavy metals such as zinc, copper, iron, manganese. Since the symptoms of deficiencies of these elements are also caused by an excess of phosphorus, a visible phosphorus toxicity in green parts is hardly noticeable.