Effects of Inhibitors on Fertility Loss Control of Source Separated Urine and Vegetable Growth

Thiourea (TU) and dicyandiamide (DCD) were chosen as inhibitors to curb fertility loss of storage urine. For the summer radish experiments, the result shows that the weight of summer radish added urine +TU were 92.2g, and the weight of fruit of summer radish added with urine + DCD, urine and without fertilizer were 72.1g, 52.4g and 40.6g, respectively. On the other hand, compared with the blank, the yield of summer radish fertilized by urine, urine + DCD and urine + TU were increased by 29.1%, 77.5% and 127%, respectively. While, the yield of radish fertilized by urine + TU were increased by 37.6% and 27.9 %, compared with urine and urine + DCD. However, for lettuce experiments, the results show that the average weight of the lettuce added urine +TU were 72.7 g, and the weight of lettuce added with urine + DCD, urine and without fertilizer were, 62.2g, 52.4g and 37.6g, respectively. Compared with the blank, the yield of lettuce fertilized by urine, urine + DCD and urine + TU were increased by 39.4%, 65.4% and 93.4%, respectively. On the other hand, the yield of radish, which fertilized by urine + TU were increased by 38.7% and 16.9 %, compared with urine and urine + DCD. All of these results indicated that TU and DCD have positive effects on fertility loss control, but TU was significantly more effective than DCD, despite the application dose of TU was smaller than DCD.