Nitrogen is the most important nutrient in coffee production during the growth phase and the second most accumulated nutrient in the beans. Nitrogen is responsible for stimulating vegetative growth and the formation of leaves and shoots on the coffee plant. It is one of the main components of proteins, enzymes, coenzymes, nucleic acids, cytochromes, and caffeine.
Common symptoms of nitrogen deficiency in coffee
Yellowing of older leaves (leaf chlorosis).
Reduced fruit production.
Greater susceptibility to diseases and pests.
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Phosphorus helps form the roots, flowers, and fruit of the coffee plant. When the root system is strengthened, water and nutrient uptake becomes more efficient. In addition, phosphorus is essential for the synthesis of organic compounds and the activation of enzymes crucial to plant metabolism.
Common symptoms of phosphorus deficiency in coffee:
Slow growth, smaller and less vigorous plants.
Dark, dull green leaves, or leaves with reddish, purplish, or bluish tones.
Shallow roots, which can make the plant more susceptible to drought.
Poorly developed root system.
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Potassium plays a fundamental role in the plant’s water management, improving its ability to defend against environmental stress. It is also known as the “quality nutrient” in plant nutrition due to its essential role in metabolic processes, enzyme activation, and the effective synthesis and transport of sugars. These functions influence the filling and chemical composition of coffee beans and, consequently, the productivity and quality of the beverage.
Common symptoms of potassium deficiency in coffee:
Yellowing of older leaves, starting at the margins and moving toward the center (“V”-shaped leaf chlorosis).
Slow growth: smaller, less vigorous plants.
Reduced bean production and size.
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For high-yield coffee plantations, sulfur is essential. This nutrient is involved in fundamental metabolic processes, such as the formation of amino acids and proteins, precursors of aromatic and flavor compounds in the beans. It also influences the acidity of the beverage and photosynthesis, impacting bean productivity and quality.
Common symptoms of sulfur deficiency in coffee:
Reduced plant growth, lower productivity.
Leaves with curled edges.
Reduced size and number of fruit.
Pale yellow or light green leaves (chlorosis), starting with the youngest leaves and possibly spreading to older ones.
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Boron is recognized as a crucial nutrient for plant development, essential for the development of reproductive buds and flower set in coffee plants. It also plays a role in regulating cell wall and plasma membrane integrity, cell division and elongation, sugar synthesis and translocation, as well as phenol and auxin metabolism, which are important for coffee plant resistance.
Common symptoms of boron deficiency in coffee:
Distorted, curled, or wrinkled young leaves.
Yellowish spots between the veins of older leaves.
Reduced plant growth and productivity.
Abnormalities in flower and pod development, such as deformities and reduced size.
Necrosis at the edges of older leaves.
Premature drop of flowers and fruit.
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Zinc is vital in coffee production. It performs essential functions that directly affect bean productivity and quality. This element activates key enzymes in the photosynthetic process, boosting photosynthetic efficiency and, consequently, resulting in more robust growth. It also promotes healthy root development and efficient nutrient uptake, optimizing leaf quality and vegetative growth, as well as increasing resistance to low temperatures.
Common symptoms of zinc deficiency in coffee:
Yellowing between the veins of the youngest leaves (interveinal chlorosis).
Reduced leaf and fruit size.
Reduced coffee bean production.
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