Section 8
Chapter 7,252

Effect of irrigation and nitrogen fertilization on dry matter production fruit yield mineral uptake and field water use efficiency of watermelon

Hedge, D.M.

International Journal of Tropical Agriculture 5(3-4): 166-174


Accession: 007251486

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Investigations carried out at the Indian Institute of Horticultural Research, Hessaraghatta, Bangalore during 1983-84 and 1984-85 indicated that irrigating watermelon when soil matric potential at 15 cm depth reached -25 kPa resulted in the highest dry matter production (193.0 g/plant), fruit yield (35.58 t/ha) and mineral uptake (51.82, 9.67, 50.28, 30.67 and 8 15 kG N, P, K, Ca, Mg/ha, respectively) which were significantly higher as compared to irrigating at -50 and -75 kPa. Field water use efficiency (FWUE) increased (15%) with decreasing frequency of irrigation. Stress of -75 kPa imposed during pre-flowering or flowering of fruit development stage significantly reduced dry matter (16-18%), fruit yield (19-24%) and mineral uptake (16-19%) as compared to that uniformly irrigated at -25 kPa. Increasing N application significantly increased the dry matter (54%), fruit yield (32%), mineral uptake (51%) and FWUE (32%) only upto 120 kg N/ha.

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