Two Field trials were carried out at Abo-Gensho village, Abshway District, Fayoum Governorate, Egypt, during two successive summer seasons of the 2017 and 2018 to study the effect of irrigation scheduling treatments and foliar spray with chitosan concentrates on growth parameters, yield and its components and some water relations of eggplants cv. black beauty. Three irrigation scheduling treatments based on coefficients of cumulative pan evaporation (CPE), i.e. I 1 : 1.1, I 2 :0.9 and I 3 : 0.7 CPE with three chitosan concentrates, i.e. C 1 : 0 (without addition, control), C 2 :40 and C 3 :80 mg l -1 with three replications in a strip plot design. Results indicated that the highest plant growth and eggplant fruits yield in both seasons were detected from a combination of irrigation at 1.1 CPE and spraying by 80 mg l -1 as chitosan concentrate. Further, it resulted in highest values for seasonal consumptive use (ET C ) as well as water use efficiency (WUE). On other hand, it could be recommended the combination of irrigation at 0.9 CPE and applying 80 mg l -1 as chitosan concentrate in Egypt for enhanced eggplant fruits yield especially under deficit irrigation water conditions.
Two field trials were carried out in Fayoum Governorate (Tamiea, Station of Agricultural Research), Egypt, during the seasons (2019/20) and (2020/21). This study aims at determining the response of yield components grain and straw yields and some water relations of barley variety (Giza 132) to different rates of available soil moisture depletion and nitrogen fertilization forms. Three irrigating regimes at 40%, 60%, and 80% of total available soil moisture depletion (ASMD) and three N fertilization forms, i.e., ammonium sulfate (20.5%N), ammonium nitrate (33.5%N), and Urea (46%N) were tested in the split-plot design with four replications. The results showed that, the highest straw and grain yield, and its components were resulted from a mixture of irrigated barley under 40% ASMD with ammonium sulfate as a form of N fertilization. Furthermore, it yielded the highest seasonal water use and water productivity results. In addition, the farm economic retune of treatments take the same trend.
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