关键词: 农用稀土, 养分, 效应, 微量元素, 水稻, 小麦, 玉米

Abstract: In this article the effect of the agricultural rare earth on the nutrient uptake of crops is reported. After using 0.03% and 0.06% concentration of agricultural rare earth, N, P, K, and the microelements in rice, corn and wheat were analysed. The results of field and pot experiments showed as follows:
Agricultural rare earth promoted the growth of roots and increased the root number by 3.2%, the root length by 11.47% and the root volume by 14.05-18.41%. Because of the increase of the uptake area, the uptake of n and P, especially N, enhanced. The tendency is that the 0.03% concentration for increasing the N uptake is better than that of 0.06%. The effect of the uptake of K is not apparent as that of N and P. Low concentration (0.03%) promotedcd the K uptake, but high concentration (0.06%) inhibited it. From the study it is concluded that rare earth has good effect on the uptake of mn, Cu, Zn and Mo for wheat and has an apparent increase in the uptake of Mo and Mn for rice, but the uptake of Fe and B is rather changeable. The trend is that rare earth decreases the uptake of Fe and B in the three crops above. It is uncertain wheather or not rare earth inhibites the Fe aand B uptake, which needs some study.

Key words: AGRICULTURAL RARE EARTH, EFFECT, ROT SYSTEM, MICROELEMENT, RICE, CORN, WHEAT