Is Your Lettuce Crop Starving for Calcium?

摘要

Calcium, though not a macronutri-ent, is essential for proper plant development. Plants absorb calcium both through their roots from nutrient solutions and through leaves and shoots during foliar applications. Xylem, the water-carrying network of cells within plants, transports calcium from the point of absorption upward through plant tissue. Transpiration powers this upward flow as the plant photosynthe-sizes and releases water molecules into the environment.