论文部分内容阅读
20世纪70年代起,稀土元素特别是镧作为植物生长刺激剂被广泛应用于农业生产,在农业领域的应用中,稀土起到提高产量、改善品质、提高农作物抗病抗逆能力和缓解重金属伤害等多重效应。研究表明,REEs对植物的生长具有双重作用,低浓度促进生长、提高作物产量,高浓度则对植物有害。根系构型(RSA)在决定植物的水分和养分吸收方面具有决定性的作用。研究发现,中、高浓度镧(La)抑制主根生长,但促进了侧根的发育,从而调节了RSA。
Since the 1970s, rare earth elements, especially lanthanum, have been widely used in agricultural production as plant growth stimulants. In the field of agriculture, rare earths play an important role in increasing yield, improving quality, improving crop disease resistance and alleviating heavy metal injury Multiple effects. Studies have shown that REEs have a dual role in plant growth, low concentrations promote growth, increase crop yield, and high concentrations are harmful to plants. Root configuration (RSA) plays a decisive role in determining plant water and nutrient uptake. The results showed that medium and high concentrations of lanthanum (La) inhibited the growth of main roots, but promoted the development of lateral roots and thus regulated RSA.