铁肥根系输液处理时铁以二价态由根被动吸收、运输。根、茎、叶和主脉内运输部位都是靠近形成层的木质部，绝大部分铁运往地上部，根系分布很少。强力高压注射时铁主要沿中央木质部运输，首先充分向下运往根系，向上运输较向下运输少。环状沟土壤浸施铁肥在不断根的情况下很难被根吸收，断根情况下吸收、运输机制与根系输液相同 Iron fertilizer root infusion treatment to the bivalent state of passive absorption by the root, transport. Roots, stems, leaves and main vein transport sites are close to the formation of xylem, the vast majority of iron transported to the upper part of the root system is rarely distributed. During intense high-pressure injection, the iron is mainly transported along the central xylem, first fully down to the root, and upwards less than downward. The annular ditch soil soaking iron fertilizer in the case of continuous root is difficult to be absorbed by the root, under the condition of root absorption, transport mechanism and the same root infusion