Rare earths are a general term for a class of elements, which are metals. Rare earth nitrate is actually a class of nitrate, which is dissolved in water to increase the content of rare earth elements in the soil.
The results showed that rare earth elements could increase the chlorophyll content of plants, enhance photosynthesis, promote root development, and increase nutrient uptake by roots. Rare earths can also promote seed germination, improve seed germination rate, and promote seedling growth. In addition to the above main functions, it also has the ability to make certain crops more resistant to disease, cold and drought.
Numerous studies have also shown that the use of appropriate concentrations of rare earth elements can promote the uptake, transformation and utilization of nutrients by plants. Corn is dressed with rare earth, seedlings emerge and jointing 1~2 days earlier than the control, plant height increases by 0.2 meters, early maturity is 3~5 days, and the grain is full, and the yield increases by 14%. The number of pods per plant increased by 14.8~26.6, and the number of 3 pods increased by 14.5%~20.0% when soybean was dressed with rare earth, and the seedling emerged 1 day earlier. Spraying of rare earth can increase the Vc content, total sugar content and sugar-acid ratio of apple and citrus fruits, and promote fruit coloration and early ripening. It can also reduce the respiration intensity during storage and reduce the decay rate.