Plant Protection Research Institute, Agricultural Research Center, Dokki-Giza, Egypt. | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 4, Volume 27, Issue 2, February 2002, Page 1277-1290 PDF (3.94 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2002.253400 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| M. M. Saied | ||||
| Soil, Water and Environment Inst., Agric. Res. Center, Giza, Egypt | ||||
| Abstract | ||||
| Two field experiments were conducted at Sakha Agric. Res. Station, Kafr EI- Sheikh Governorate during the summer seasons of 1999 and 2000. The situation lies and represents the conditions of North Nile Delta. The aim of this study was to find out the effect of different irrigatien intervals and zinc foliar spraying on maize and cotton yields as well as some water parameters. In additien to define a simple equation te . predict contribution of water table to crop water needs fer such crops under study in North Nile Delta. A split plot design with four replicates was practiced. The irrigatien intervals; 12, 18 and 24 days occupied the main plots. While zinc foliar spraying; control, 0.05% and 0.1% Zn as EDTA were arranged in the sub plots. The obtained results could be summarized as follows: The highest mean values of beth maize grain and seed cotton yields were obtained under irrigatien every 18 days and zinc foliar spraying of 0.1 % as EDTA. The interaction between the stated treatments resulted in highest yields per each unit of seasonal water duities as so called maximum irrigatien efficiency. Average values of seasonal soil moisture depletion (S.M.D.) fer maize were 51.33, 48.85 and 41.51 cm. under irrigatien intervals 12, 18 and 24 days, respectively. The correspondinq values of S.M.D. fer cotton were 68.77,57.25 and 51.17 cm. fer the previously treatments. The water table contribution to water use of maize was 14.13, 16.54 and 18.13% under irrigatien intervals of 12, 18 and 24 days respectively. Under shallow water table conditions, the irrigatien intervals could be extended to promote the use of such shallow greundwater by gr.owing plants and reducing the water needs of the crops. While the corresponding values of cotton were 15.58., 19.52 and 12.35% for the stated treatments. High pronounced value of 0.997 as a coefficient of determination fer each crop was detected from the relation between water table depth in (m) as independent variable (X) and the ET portion as % which supplied from water table as dependent variable (Y). Regressien equations were: Maize: Y = 0.509-0.381 (X). Cotton: Y = 0.605-0.504 (X). | ||||
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