Effect of time and frequency of nitrogen fertirrigation on melon yield

Abstract

A study of the effect of time and frequency of nitrogen fertirrigation on melon (Cucumis melo L.) yield at the Agricultural Research Center of the Semi-Arid Tropics (EMBRAPA-CPATSA). Two frequencies of application and seven periods of fertirrigation were allocated in a randomized block design in a factorial arrangement, with four replications. The following frequencies of fertirrigation were used: daily and three times a week. The following periods of fertirrigation were used: 1. application of N up to 55 days after planting (DAP); 2. application of N up to 42 DAP; 3. application of N up to 30 DAP; 4. application of 70% N up to 42 DAP and the remaining 30% up to 55 DAP; 5. application of 70% N up to 30 DAP and the remaining 30% up to 55 DAP; 6. application of 70% N up to 30 DAP and the remaining 30% up to 42 DAP; in the control, 55% of N as basal dosis and the remaining 45% as top dressing at 30 DAP. Trickle irrigation was used and the highest yield (20.28 t/ha) was obtained with daily frequency of fertirrigation. As far as effect of time and frequency of fertirrigation are concerned in melon production, daily frequency and periods of 55 and 42 days of fertirragation are recommended.