The present invention relates to a plant growth improver comprising a growth enhancing component that improves the concentration of an oxoanion that is heavier than sulfate ions and contains four oxygens around the plant, seeds provided with the plant growth improver, and growth. The present invention relates to a method for improving the growth of a plant provided with a cultivation process for growing the plant in the presence of an improving component.本発明は、硫酸イオンよりも重くかつ４つの酸素を含むオキソアニオンの、植物の周囲における濃度を向上させる生育向上成分を含む植物生育向上剤、植物生育向上剤が付与された種子、及び、生育向上成分の存在下で植物を生育させる栽培工程を供えた植物の生育を向上させる方法に関する。
