Calcium is an essential secondary nutrient for crop growth, known as the “skeleton element of crops”. It serves as a core component forming crop cell walls and cell membranes, and directly participates in key physiological processes including cell division, tissue differentiation, nutrient transportation and pectin synthesis. It determines root vigor, peel toughness, fruit firmness and the overall stress resistance of crops. Calcium has extremely poor mobility inside crops and cannot be naturally transported from old leaves to new shoots and young fruits. For this reason, calcium deficiency symptoms mainly appear on young leaves, new shoots and fruits. It is one of the most easily overlooked yet highly destructive nutrient deficiencies in the cultivation of fruits, fruit trees and vegetables.
Available calcium deficiency commonly occurs in most farmlands. In acidic soils, calcium is prone to leaching away with rainwater. In alkaline and saline-alkali soils, calcium gets immobilized and turns into inert calcium that crops cannot absorb. In addition, long-term exclusive application of NPK compound fertilizers, continuous cropping and excessive irrigation and fertilization will severely hinder crops’ uptake of calcium. Calcium deficiency causes severe damages to crops. At the seedling stage, it leads to curled and deformed new leaves, withered leaf tips and necrotic growing points, resulting in stunted and weak seedlings. During the flowering stage, flower organs develop abnormally, causing flower and bud drop. At the fruit expansion stage, various physiological diseases frequently break out, such as blossom-end rot in tomatoes, pedicel rot in peppers, internal browning in cabbages, fruit cracking in grapes, puffiness and hollow fruit in citrus, and bitter pit in apples. Affected fruits become soft with thin and fragile peels, prone to malformation and cracking, and have poor storage and transportation resistance, which greatly reduces commodity rate and leads to substantial yield and income losses.
Conventional calcium fertilizers such as calcium nitrate, calcium chloride and quicklime have obvious drawbacks. They feature poor stability, are easily fixed by soil with low absorption efficiency, and their efficacy is greatly affected by soil pH. When sprayed, they tend to leave residues and scales, and interfere with the absorption of magnesium, potassium and other elements, resulting in unsatisfactory calcium supplement effects and failure to tackle hidden calcium deficiency and fruit calcium deficiency. Adopting advanced EDTA chelating technology, EDTA-Chelated Calcium fully complexes calcium ions with chelating agents to form highly stable active chelated calcium, completely overcoming the defects of traditional calcium fertilizers. Adaptable to soils with a pH range of 4.0 to 8.5, this product is acid and alkali resistant, free from immobilization, element antagonism and precipitation, and not restricted by soil salinity and texture. It can rapidly penetrate soil barriers and crop leaf cuticles without needing conversion and activation in soil, and can be directly absorbed and utilized by crop roots, leaves and fruits. It greatly improves calcium utilization efficiency, realizes rapid and sustained calcium supply, and fundamentally solves crop calcium deficiency problems.
Application of EDTA-Chelated Calcium quickly supplements crops with active calcium ions and repairs damaged cell walls, making curled and withered new leaves turn flat and dark green again and restoring normal growth of growing points. It effectively relieves problems including stunted seedlings, weak plants and withered new shoots at the seedling stage. Continuous calcium supplementation thickens crop cell walls and enhances the toughness of plant structures, resulting in thick and sturdy stems as well as robust leaves, improving crop vigor and preventing excessive vegetative growth and lodging. Meanwhile, it markedly thickens fruit peels and increases fruit firmness and toughness, effectively preventing fruit cracking, hollowing, softening and malformation, and delivering well-shaped fruits with improved commercial quality.
Furthermore, this chelated calcium activates various enzymes in crops, promotes the synthesis and transportation of carbohydrates and proteins, and accelerates the accumulation of sugar and dry matter in fruits. It improves fruit sugar content, flavor and luster for better overall fruit quality. It also significantly enhances crop stress resistance against high temperature, drought and diseases, reduces the incidence of physiological disorders, extends the fresh-keeping, storage and transportation period of fruits and cuts cultivation losses. Moreover, it optimizes the rhizosphere soil environment, boosts root development and improves the roots’ capacity to absorb water and nutrients. It balances nutrient uptake of crops and avoids element antagonism.
This product is suitable for all types of grain crops, vegetables, fruits and cash crops, including vegetables like tomatoes, cucumbers, peppers, eggplants, cabbages and kales, fruit trees such as citrus, apples, grapes, strawberries, peaches and mangoes, as well as rice, wheat, peanuts, flowers and seedlings. It can be safely used throughout the whole growth cycle. Multiple application methods are available, including foliar spraying, drip irrigation, fertigation and root drenching. It supplements calcium to strengthen seedlings and protect growing points at the seedling stage, promotes flower formation and retention and fortifies flower organs during the flowering period, and strengthens fruits, prevents cracking, increases fruit firmness and locks nutrients at the fruit expansion stage. It prevents calcium-deficiency diseases all year round, laying a solid foundation for stable high yield, superior produce quality and higher profits for growers.
