TEMPORAL-SPATIAL DISTRIBUTION OF SOIL INORGANIC NITROGEN IN CYPERUS MALACCENSIS RHIZOSPHERE AND NON-RHIZOSPHERE

The pilot-scale wetlands system and a specially-made root PVC chamber were used to cultivate Cyperus malaccensis in outdoor to study soil inorganic nitrogen temporal-spatial distribution characteristics in Cyperus malaccensis rhizosphere/ non-rhizosphere. The results showed that different parts of Cyperus malaccensis had various interstitial water ammonium nitrogen content with time and space differences, ranging from 0.32 mg/L to 0.32 mg/L. The temporal-spatial distribution variability is the biggest among the non-rhizosphere, rhizosphere, root zone in time and space distribution with relative stability. Nitrate nitrogen in water was less than 0.12 mg/L to trace changes. Inorganic nitrogen of Cyperus malaccensis three partitions in the soil increases gradually over time. The non-rhizosphere distribution change is less than in the root zone and rhizosphere.There are no clear difference between different root system distributions.