Effects of rate and depth of fertilizer application on emission of nitrous oxide from soil fertilized with anhydrous ammonia

摘要

Field studies to determine the effect of different rates of fertilization on emission of nitrous oxide (N2O) from soil fertilized with anhydrous ammonia showed that the fertilizer-induced emission of N2O-N in 116 days increased from 1.22 to 4.09 kg ha−1as the rate of anhydrous ammonia N application was increased from 75 to 450 kg ha−1. When expressed as a percentage of the N applied, the fertilizer-induced emission of N2O-N in 116 days decreased from 1.6 to 0.9 as the rate of fertilizer N application was increased from 75 to 450 kg N ha−1. The data obtained showed that a 100 increase in the rate of application of anhydrous ammonia led to about a 60 increase in the fertilizer-induced emission o