Study on Correlation of Nitrogen Forms with Nitrogen Absorption Contents of Maize

The relative analyses show that the correlation extents were different between various nitrogen forms and nitrogen absorption contents of maize in Albic soil of east regions of Heilongjiang Province.The N0 value,available nitrogen,hydrolizable nitrogen,amino acid-nitrogen and mineralizable nitrogen had very significant positive relation with nitrogen absorption contents of maize.Also,the total nitrogen,amino sugar nitrogen and ammonium nitrogen had significant positive relation with nitrogen absorption contents of maize.But the unidentified nitrogen,unhydrolizable nitrogen had no relation with the nitrogen adsorption contents of maize.