Study of utilization rate of coated urea nutrient release based on non soil culture

This text studies coating material as the tung oil of the nature resources(withdraw from the fruit of tree) and producing the coated-released-fertilizer and Study of the ratio of utilization of release of nutrient with the coating urea based on Soil-less culture.The result shows that the early rate of nutrient released from coated-released-urea is 22.5% in the way of the soil-less culture condition and the early rate of nutrient released from urea is 82.1% and is lower 59.6%;it may be produced 42.4g bio-mass in coated-released-urea and may be produced 14.4g bio-mass in urea and is tall 28.0g bio-mass in coated-released-urea;The ratio of utilization of nitrogen from coated-released-urea is 48.5% and The ratio of utilization of nitrogen from urea is 15.7% and is not lower 33.2%.Conclusion: by means of the soil-less culture,The proof is tested that the rate and utilization of nutrient released from coated-released-urea as coating material with tung oil,The loss of nitrogen easily happen and in project of fill a prescription we ought to add nitrogen fertilizer.