What Is Iron Deficiency Chlorosis? The Solution Explained in One Article

Iron deficiency chlorosis is a common nutrient deficiency disease in plants, mainly manifested as leaf yellowing (loss of green color), which seriously affects plant growth and development. This article will explain in detail the causes, symptoms and effective solutions of iron deficiency chlorosis.

Iron deficiency chlorosis refers to the yellowing of leaves caused by a lack of the element iron in plants. Iron is a key component in the plant's synthesis of chlorophyll; a lack of iron will block chlorophyll synthesis, thereby affecting plant photosynthesis, and in severe cases leading to slow plant growth, reduced yield, and even death.

The occurrence of iron deficiency chlorosis is related to many factors, mainly including the following aspects:

Soil salinization, low organic matter content, and poor permeability all affect the availability of iron, making it difficult for plants to absorb and utilize. Irrigation with groundwater of high mineralization will aggravate soil salinization and further reduce iron availability. Excessive application of nitrogen and phosphorus fertilizers will inhibit the plant's absorption of iron, thereby triggering chlorosis. In dry climate years, the large evaporation of soil moisture causes salts to move upward, which aggravates the harm of salinity and alkalinity and leads to the occurrence of iron deficiency chlorosis.

The symptoms of iron deficiency chlorosis mainly appear on the plant's leaves; the most typical symptom is that new leaves are pale yellow while the veins remain green, forming an obvious contrast. As the disease progresses, the leaves gradually yellow and become thinner, and in severe cases the leaves wither and drop off.

Solutions for iron deficiency chlorosis

Apply organic fertilizer (such as decomposed animal manure, plant residues, etc.) to increase the soil's organic matter content, improve soil structure, and increase iron availability. Keeping the soil slightly acidic helps the dissolution and absorption of iron. In alkaline soil, an appropriate amount of acidic fertilizer (such as ferrous sulfate) can be applied to lower the soil pH. Avoid irrigation with groundwater of high mineralization, and instead use water from rivers, ponds or reservoirs for irrigation. Irrigate in the morning or evening, and avoid irrigating during the high-temperature period at noon, which causes water to evaporate too quickly and aggravates salinization. Reasonably balance nitrogen, phosphorus, potassium and other nutrients according to the plant's growth needs, and avoid excessive application of nitrogen and phosphorus fertilizers. In plots with severe iron deficiency, an appropriate amount of iron fertilizer such as ferrous sulfate can be applied. When applying, the iron fertilizer can be mixed with organic fertilizer and applied deep into the soil, or dissolved and used for foliar spraying.

For fruit trees and other fruiting plants, reasonably control the fruit load and avoid excessive fruiting, which causes excessive nutrient consumption and thereby triggers iron deficiency chlorosis. Regular intertillage and loosening of the soil can improve soil permeability and increase iron availability. In the rainy season or in low-lying areas, strengthen drainage and waterlogging prevention to prevent prolonged water accumulation in the soil, which causes root hypoxia and blocked iron absorption.

Iron deficiency chlorosis is a common nutrient deficiency disease in plants and has a serious impact on plant growth and development. Measures such as improving the soil, rational irrigation, rational fertilization, adjusting the fruit load, and strengthening field management can effectively prevent and solve iron deficiency chlorosis.