تأثير تناسق الارواء بمياه الري المالحة على الانتاج تحت الري الناقص

  • نوال محمد ججو كلية الهندسة جامعة الموصل
  • باسم محمد نصيف الزيدي قسم الهندسة المدنية كلية الهندسة جامعة ذي قار
Keywords: تناسق الارواء, الري الناقص, ملوحة ماء الري, الانتاج

Abstract

The study aimed towards developing a computer model to be used for evaluating the
effect of water distribution uniformity of deficit irrigation with saline water on field crop
production. The development of the model is based on the concept of water balance in the
field. For the application of the model, corn crop (yellow maize) autumn season is selected
using ready data on reference evapotranspiration at the selected field site (North Jazirah
Project – Nineva). Moreover, published data on field sprinkler water distribution around
sprinkler head of stationary system are used. The main assumption upon which the model is
based is that, for a given case, irrigation water distribution and salinity are fixed for all
irrigations during the season. The results of the study revealed that the deficit in the yield ratio increases with the increase in moisture depletion ration and water salinity, but decreases
with the increase in the degree of irrigation uniformity. Furthermore, the effect of salinity on
production is greater with deficit irrigation, therefore a balance should be sought between
deficit irrigation level and water salinity on production under each case of irrigation nonuniformity.
Finally,
the
study
showed
that
the
leaching
fraction
increases
as the degree of
irrigation
uniformity
deteriorates
because
deep
percolation
losses
increase with
the
reduction
in
uniformity.
Published
2019-04-29
Section
Articles