Two field experiments were conducted at the Research and Experiment Center, Fac. Agric.,
Moshtohor, Benha Univ., KalubiaGovernorate, Egypt, during (2018 and 2019) summer seasons, to study the
effect of four water regimes i.e, two irrigationsat flowering and pod formation stages (40 and 80) day after
planting (DAP), four irrigation at vegetative growth, beginning of flowering, beginning of pod formation and
full pod formation stages (30, 60, 90 and 120 DAP, respectively), six irrigations at vegetative growth, beginning
and full pod formation, full pod formation and full seed formation stages (30, 50, 70, 90, 110 and 130 DAP,
respectively) and normal irrigations (8 regular subsequent irrigations as a control) as well as biochemical
studies on some Soybean (Glycine max L. Merrill ) varieties (Giza 21, Giza 35, Giza 111 and Crawford) on yield,
yield components and chemical compositions of soybean varieties in both seasons. The treatments were
arranged in a split-plot design with four replications. Irrigation regimes were distributed at random in the main
plots while, soybean varieties occupied the sub-plots. The sub-plot area was 10.5 m2 consisted of 5 ridges of
3.5 m long and 60 cm width. Data exerted that all various treatments clarified a significant differences with these
traits compared with control plants.It could be summarized as follows:
All traits under study were significantly increased by increasing number of irrigations as compared with
the lowest number of irrigation in both seasons respectively.
Soybean varieties were significantly different in all of the studied traits in both seasons except total
chlorophyll contentin soybean in the first season.
Generally, results were exerted insignificant effect of the interaction between irrigation regimes and
soybean varieties for most traits of yield components and chemical composition of soybean leaves and
seedsin both seasons, respectively. |
