"Urgent, urgent! The leaves of my tangerines have turned a lot, what should I do?" "The leaves in my tangerine garden have turned yellow, please help me~" Every year after autumn, in our circle of friends who grow tangerines There are many messages asking for help . The photo also shows a tangerine tree with yellow leaves. If not handled in time, most of the leaves will wither.
To solve the problem of yellowing leaves, nourishing soil and roots are the key!
1. Reasons for yellowing1. In citrus orchards produced for many years, due to long-term nutrient production, the nutrients provided by the soil are depleted from year to year, leading to a decline in soil fertility. In addition, fruit growers usually apply nitrogen, phosphorus, potassium, etc. while neglecting to provide organic fertilizers and trace elementselements on the ground. It is very easy to cause vegetables to turn yellow due to lack of trace elements. The soil conservation capacity of some mandarin orchards is low, and rainwater erosion leads to loss of boron and magnesium, causing old leaves to turn yellow.
2. Unbalanced soil pH In places like Guangxi, Guangdong, and Yunnan, the most common soil is red and yellow. These two soils are generally acidic, and only certain limestone areas are alkaline. When building orchards in highly alkaline plots, soil nutrients are particularly easy to fix, making it difficult for orange trees to absorb and use them. Due to pesticide application and other reasons, most citrus orchards now suffer from soil acidification, nutrient imbalance, and severe lack of medium and trace elements.
2. The misdeeds ofu orange yellowingOlder generations often say: "To cultivate a tree, you must first nourish the roots, and to nourish the roots, you must first nourish the soil, and to nourish the soil, you must fertilize .The citrus system is strong and absorbs enough nutrients
In the current Wogan production process, most fruit growers will ignore the use of summer and autumn fertilizers. also called root fertilizers, which are mainly fermented organic fertilizers or water-soluble organic fertilizers to avoid trouble, choose a fast-acting fertilizer
However, timely application of. Fast-acting fertilizer is very detrimental to mandarin trees with insufficient root activity. Generally, after autumn, the temperature gradually drops and precipitation also decreases in comparison. Under these conditions, the root system of the Wogan is easy.ement affected, the absorption capacity is weakened, the autumn shoots do not receive enough nutrients and the leaves. turn yellow.
Leaf yellowing is a direct manifestation of the deterioration of the mandarin root system, and this phenomenon is common in mandarin orchards that do not often apply organic fertilizers but use chemical fertilizers for a long time. . This is deadly for orchards. Once the plant shoots turn yellow in autumn, the tree will gradually weaken in the later stages of growth and it will be difficult for the fruits to ripen. If left unmanaged, they will be infected by other plants later. .
3. Methods of soil improvement1. Apply more organic fertilizer. Organic fertilizer contains very complete nutrients, rich in organic matter, nitrogen, phosphorus, potassium and trace elements, and has a t effectvery obvious on soil improvement.
2. Balanced fertilization. Considering the low fertility and nutrient imbalance in the tangerine orchard which has been receiving nutrients for many years, we applied nitrogen, phosphorus and nitrogen in a balanced manner for different periods growth.Potassium and trace element fertilizers can effectively fertilize the soil, save fertilizer and improve the quality of Wogan fruits.
3 Straw mulch. Typically, in spring and autumn, broken wheat straw can be covered around mandarin trees. It can not only remove salt, retain water and balance soil temperature, but the straw can also be transformed into soil organic matter. plowing and retting, releasing various elements necessary for the growth of fertile oranges and improving soil fertility.