The effects of nitrogen fertilizer or low temperature on the nitro-compound of corn

The nitro-compound, nutritive material and silages fermentation of corn were studied under different nitrogen fertilizer application or temperature, the results showed that corn had good fermentation quality under different nitrogen fertilizer application or temperature. The DM (Dry Matter), CP (Crude Protein) contents of corn were increased significantly at the 0.05 level with the increased of fertilizer nitrogen amount however, the WSC (Water Soluble Carbohydrate) content decreased but these were eliminated by low temperature treatment. And the nitrogen content increased significantly at the 0.05 level under different nitrogen fertilizer application or temperature. The nitrate content reduced post-ensilaged and the nitrite content improved significantly, respectively. The enzymatic activities of NR (Nitrate Reductase) and PM H+-ATPase (Plasma Membrane H+-ATPase) were improved significantly by the use of nitrogen fertilizer treatment although, they were reduced under low temperature. The nitrogen contents in the soil decreased after planted. However, it was improved under different nitrogen fertilizer application or temperature, the coefficient of soil nitrogen utilization of corn were not changed significantly even the nitrogen content improved under low temperature treatment.