No abstract

The amount of inorganic nitrogen in the soil remained low in the tea field, even when ammonium sulfate and rapeseed oil cake were used. The 15 N contribution rate of the second flush was 4.8% and the utilization rate of the nitrogen fertilizer in the first and second flush was 3.8%; these values were lower than those in a tea field without litter. Consequently, it was thought that the litter accumulated after trimming and pruning in the space between hedges might have been a factor responsible for the decline in fertilizer application efficiency.