Comparison of ammonia losses under various conditions after organic fertilization

摘要

Farm effluents are applied to land to supply plant mineral nutrients requirements. Ammonia volatilization decreases their N fertilizing value. Experiments were carried out using three wind tunnels where soil and environmental conditions can easily be controlled. Seven experiments were conducted to characterize the influence of the soil surface conditions on volatilization. Four of them were devoted to soil cultivation, before, during and after spreading. We focussed on the effect of the proportion of slurry really incorporated into the soil. In three other experiments, the effect of the soil surface temperature was studied. It was thus shown how measurements using wind tunnels help understanding the agricultural techniques and environmental conditions influence on ammonia volatilization.