A STUDY OF WATER AND FERTILIZATION REQUIREMENTS OF Jatropha curcas, L. UNDER SEWAGE WATER IRRIGATION CONDITIONS

Abstract

Jatropha curcas L. was cultivated in Abou Rawash, 6 th October Governorate, Egypt. The plants were irrigated at three different intervals (7, 14 and 21 day) using sewage water receiving primary treatment from Abou Rawash Station and were fertilized with calcium superphosphate (15% P 2 O 5 ) and potassium sulphate (50% K 2 O) every 2 months at rates of 0:0, 50:25, 75:37.5 and 100:50 g/plant.The obtained results indicated that 7-day irrigation intervals gave the best vegetative growth, fruit yield and oil percentage in seeds, followed by 14-day intervals but 21 days intervals gave the lowest value.Plants fertilized by 100:50 and 75:37.5 g/plant P 2 O 5 :K 2 O gave the highest values for vegetative growth, fruit yield and oil percentage as compared to other fertilizer treatments.The fertilization treatment of 100:50 g P:K/ plant combined with 7-day irrigation intervals increased vegetative growth, fruit yield and oil percentage as compared to other treatment combinations.