دور جدولة الري وعمقه في نمو وحاصل الذرة الصفراء 1. بعض الصفات الحقلية

الملخص EN

A field of experiment was conducted at the Field of Crops Research Station / Abu-Graib during 2008 & 2009 seasons, to study the effect of irrigation frequency and irrigation depths on some field characterize of maize.

The layout of the experiment was a split–plot in RCBD with four replications. Irrigation frequency (5 and 10 days) were the main plots while the depths (6,9 and 12 cm) refers to water quantities (900,1350 and 1800 liter) were used as sub-plot.

Seeds of the "5012" synthetic variety of maize was planted in the 15th of March and 15th of July for both spring and fall seasons, respectively.

Results shows that irrigation every 5 days was superior in days to 90 % an thesis reaching 73.6, 72.3, 70.3 and 69.2 days ; physiological maturity reaching 107.3, 107.8, 106 and 104 days ; leaf area plant reaching 0.4953, 0.5160, 0.5149 and 0.5280 m2 ; roots dry weight reaching 32.5, 35.8, 34.5 and 35.8 gm ; stem dry weight 77.8, 79.8, 79.6 and 81.1 gm ; leaf dry weight reaching 50.9, 52.8, 52.9 and 53.7 gm ; for both spring and fall seasons, respectively plant height reaching 177.8 and 185.4 cm for both fall seasons, respectively.

Also 12 cm depth was superior in days to 90% anthesis reaching 73.6, 71.1, 69.9 and 69.3 days ; physiological maturity reaching 108, 108.3, 106.5 and 106 days ; leaf area reaching 0.4726, 0.4983, 0.5018 and 0.5156 m2 ; root dry weight reaching 30.9, 35.3, 32.1 and 34.3 gm ; stem dry weight 75.6, 76, 77 and 80.1 gm, and leaf dry weight reaching 47.1, 49.1, 49.6 and 50.9 gm for both spring and fall seasons respectively.

So we concluded that field trails was superior in fall seasons compared with spring seasons, we recommended the using of irrigation every five days.

This will be helpful in field trails.

Scheduling and repeating of irrigation for saving portion of water may be useful in future agriculture expansion.