PHYSICAL AND CHEMICAL-PROPERTIES OF A DURABLY EFFICACIOUS AMMONIUM BICARBONATE AS A FERTILIZER AND ITS YIELD-INCREASING MECHANISM

A new fertilizer of cocrystal type, known as durably efficacious ammon ium bicarbonate (DEAB), has been developed by adding a certain amount of dicyandiamide (DCD) as an ammonia-stabilizing agent to ammonium bic arbonate (AB) during the process of its production. As compared with A B, DEAB was found to have a reduction of direct volatilization loss by 53%, a fertilizer availability period prolonged from 35-45 to 90-110 d, and an increase in the rate of nitrogen in fertilizer being utilize d by 5.9%-10.2%, and a saving of the amount of fertilizer to be applie d by 20%-30% for the same level of yield, or an increase of the crop y ield by over 10% for the same level of nitrogen fertilization; in addi tion, it was found to show usually a function of promoting the crop to early mature. It can be applied as a basal dressing all in one time t o soil and thus also used as a labour-saving and crop yield-increasing fertilizer for a non-intertillage, plastics film covering and water-s aving agriculture.