Study Of Rare Earth On Bio-effect Compounds In Crop

Application of REE in agriculture, which is an important burgeoning edge subject, is developed in China in recent thirty years. Addition of REE with appropriate dose can raise crop production and improve crop quality, which has been confirmed by many experiments and studies. However, the mechanism of it has not been understood completely.This experiment adopts wheat and rape as treated crop, and study an impact of rare earth elements La and Nd over wheat and rape young seedling body planted agent exciting matter by water culture experiment and chromatographic analysis.The experiment sets up five treatment lanthanum and neodymium for 0 mg/1, 5 mg/l, 10 mg/l, 25 mg/l, and 50 mg/l 5 in total. Wheat and rape were planted by water for 45 day. And pick up the wheat and the rape's tissue fluid. Use mass spectra and infrared spectra analysis; deduce the structure of these kind compounds.Analyze rare-earth element effect on plant root system theoretically, under the external world environmental effect, be similar to plant root system secrete some compounds, the ion combines with the rare earth and enter the plant body inner. In establishing the body inner, since change happened in the environment, establish inside of producing a series of chemistry , biochemistry reaction surely , arouse but this series of reaction needing to have some to be similar to signal matter, this signal thing exactly is that are what the thesis needs to seek.Studies shows, organic effect is notable in the rare-earth element lanthanum, the neodymium root system to the wheat and ground location tissue fluid. Contents are relatively higher than ground location in root system; indicate that kind organic matter being hit by beneficiation amounts greater than ground location in root system among three unknown compounds finding that, parting for by comparing. The liquid effect the rare-earth element lanthanum, the neodymium are extracted to the rape organization differs, among them the lanthanum tissue fluid effect to rape seedling is more obvious, but the neodymium effect difference is not obvious.The unknown thing of series goes through the ultraviolet spectrum, mass spectra, infrared spectra- analysis; for sure unknown thing middle contains structure such as benzene ring and amino acid, three kind's unknown compounds name for UC1, UC2 and UC3 respectively in proper order according to parting for time. Research is discovered , all is contains the identical base group, moreover M/Z approximation , is deduce that compounds may be a co specific matter diversity form three kinds among this three kinds matter structure.This three kinds compounds first steps define the rare earth effect thing. But their architectural completeness ascertains and be a rare earth effect really thing needs more thorough research.