Method of fertilizer application for onion based on nitrogen fertilizer efficiency of rapeseed meal and new estimation method of composted poultry
2015
Inoue, K.
Total nitrogen concentration of composted poultry produced in Nagasaki Prefecture was 3.0 to 3.6% on average. Nitrogen fertilizer response of composted poultry were mainly reported 20 to 40%, and 7 to 17 kg per ton. Nitrogen fertilizer response of rapeseed meal were mainly reported 55 to 78%, and 36 to 51 kg per ton. Dry weight, nitrogen content, carbon content of onion increased dramatically in early March. Method of fertilizer application for onion based on nitrogen fertilizer efficiency of rapeseed meal and new estimation method of composted poultry were able to substitute for chemical fertilizer. Costs of composted poultry and rapeseed meal were equivalent to chemical fertilizer.
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