( Effect of Different Irrigation Water Levels and Bio-Minerals Fertilization on Fruit Yield, Quality and Water Productivity of Watermelon Grown in Sandy Soil, Egypt)

Khalifa, R.M.

Egyptian Journal of Soil Science 60(3): 231-246


ISSN/ISBN: 0302-6701
Accession: 071073128

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AFIELD experiment was conducted in farmer's field located at Gammsa district, Dalcahlya vemorate, Egypt, during two successive winter seasons 2017 and 2018 to determine and evaluate the response of watermelon grown on sandy soil to three irrigation regimes; 100%(I-1), 85%(I-2) and 70%(I-3) of soil field capacity and four applications of bio-mineral fertilizers; F-1 Applying the recommended dose of NPK (100%RNPK), F-2 (85%RNPK + biofertale), F-3 (70%RNPK + rhizobacterien) and F-4 (55% RNPK+ mixture of biofertale + rhizobacterien). Results showed that both of irrigation and fertilization treatments had highly significant effect on yield and its components of watermelon plants in both seasons. Maximum fruit yield and its components were achieved with I-2 and F-3 treatments in both seasons. Irrigation with (I-2), led to increase fruit yield by (14.26 and 14.30%) compared with I(1)and the corresponding values (11.72 and 12.97%) with (F-3) compared with F-1 in 1st and 2nd seasons, respectively. I-3 achieved higher values of TSS, vitamin C, soluble sugar, PEW and water saving. Moreover, F-3 followed by F-4 produced the highest value of PEW in both seasons compared with F-1. The combination of I2F3 has superiority in increasing fruit yield and its quality, net return and economic efficiency. Net return from water unit was resulted from the combination of (T3F4) and (I-3 F-3) as compared with (I1F1) in both seasons, respectively.Generally, it could be concluded that I2F, or I2F4 is the most efficient treatment for achieving economical watermelon fruit yield, economic return and saving water and mineral fertilizers.