Distribution of nitrogen forms in calcareous soils province and their relationship with soil characteristics

Nitrogen is The most important element influencing plant growth , and the most important fertilizer element. Some forms of nitrogen distribution in soils examined with surface soil samples from different agricultural areas in the province. In The chemical test conducted on samples, Total nitrogen(STN) was measured from 490 to 2750 (mg / kg) of soil , And the greatest amount of nitrogen in the soil, With a mean corresponding to the BOX-NB 99/56 (mg / kg) of soil, and the lowest amount of nitrogen NPHEN, with an average of 43/10 (mg / kg) of soil, respectively. The overall abundance of nitrogen in the soil was determined as follows: BOX-NB> NHOX-NH> NHSULN> NAOHNB> NKCL> NNH4> NPHEN The highest correlation coefficient between the STN and forms of nitrogen in soils is the BOX-NB by a factor of 872/0, And the lowest a factor of 038/0 of NNH4, respectively. Equations obtained between total nitrogen and soil organic matter OM, and OM with BOX-NB was a high correlation coefficient.

lorestan , nitrogen distribution , soil characteristics , plant .