不同土壤对包膜尿素养分释放速率的影响

以自然资源桐油为包膜材料,生产包膜尿素,研究不同土壤对包膜肥料养分释放速率的影响。4种土壤中,其初溶出率均为0。根据LOGISTIC生长曲线模型进行模拟,其最大养分释放量在黄红壤中为91.9%,低于红壤的98.2%、沙质红壤的98.4%和沙质黄红壤的96.7%。其养分释放期在红壤和沙质红壤中为218.4d,在黄红壤中为322.9d,在沙质黄红壤中为190.5d。图1,表4,参6。

The influence of the velocity of release of nutrient with the coating urea and in different soil

This text studies coating material as the tong oil of the nature resources (withdraw from the fruit of tree) , and producing the coated release fertilizer, we study the influence of the velocity of release of nutrient with the coating urea in different soil , the measurement of nutrient adopts weight method.The result shows that the early rate of nutrient released from coated-released-urea is 0 in four soil. According to the curve of growth of the LOGISTIC with imitation.The worth of measurement with imitation, the biggest nutrient from coated-released-urea is 98.8% in the yellow red soil and obvious lower than red soil 98.2% , sandiness red soil 98.4% , sandiness yellow red soil 96.7% .the period of nutrient released is 218.4 days in the red soil and sandiness red soil .the period of nutrient released is 322.9days in the yellow red soil and is 190.5 day in the sandiness yellow red soil.