根表铁膜对水稻磷素吸收影响研究进展

Research Progress on Effect of Root Surface Iron Plaque on Rice Phosphorus Absorption

磷(P)对水稻生长的影响仅次于氮。P在土壤中含量丰富,但由于其难溶性及土壤的高吸附性,可被植物直接吸收利用的活性P含量很低。根表铁膜对土壤中的P有很强的吸附作用,在一定程度上是植物的营养库,铁膜中的P是植物吸收的重要P源。有关根表铁膜与水稻P吸收的关系已有很多报道,是促进还是抑制作用情况比较复杂。本文综述了水稻根表铁膜的形成原因、对P的吸附与解吸附能力以及对水稻吸收利用的影响,并对今后开展根表铁膜对水稻P吸收的调控机理研究提出几点建议,同时对根表铁膜调控水稻P吸收的应用前景进行了展望。

The effect of phosphorus(P)on rice growth is next to that of nitrogen.The P content in soil is rich,but the active P which can be directly absorbed and utilized by plants is very low because of its solubility and high adsorption capacity of soil.Root iron plaque has a strong adsorption effect on P in the soil,to some extent,it is the nutrient pool of the plant,and P in iron plaque is an important source of P absorbed by plants.There have been many reports on the relationship between root surface iron membrane and P absorption,but whether it promotes or inhibits P absorption is complicated.In this paper,the cause of iron plaque formation on rice root surface,the adsorption and desorption capacity of P,and the effect of iron plaque on rice P absorption and utilization were reviewed.Some suggestions on the regulation mechanism of iron plaque on rice P absorption were put forward,meanwhile,the application prospects of the iron plaque on the root regulating P uptake in rice were prospected.