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Abstract
This investigation was carried out in order to:
1 1. Compare between different fertigation methods with plat- in nd and plat- on line emitters under 0.5-1.5bar operating pressures
2. Find out the best fertigation device with plat- in and plat -on
line emitters and different lateral lengths in drip irrigation
system ; and
3. Finally chose the best device for applied fertilizers and
chemicals under certain operating condition.
Drip irrigation system including fertigation units represents
in this research. The effect of fertigation devices under
different lateral lengths on the distribution uniformity of
water and fertilization were evaluated, in order to clarify
the best fertigation devices and lateral lengths in the
experimental farm. The results exhibit that distribution
uniformity DU using the hydraulic injection pump were
90 , 99 and 97% for lateral lengths of 20,40 and 60m
respectively. However, DU,s using the venture device
were 97, 92 and 99% for the same lateral lengths. However,
using Pressure differential tank DU,s were 97, 98 and 99%
for the same lateral lengths. And using Electrical centrifugal
pump DU,s were 97 , 96 and 100 % for the same lateral
lengths. The results of distribution uniformity of (F.D.U)
with using the hydraulic injection pump were 96 , 98 and
99%for lateral lengths of 20 , 40 and 60m respectively.
The F.D.U with using Electrical centrifugal pump were
97, 98 and 96 % lateral for lengths of 20,40 and 60m
respectively , and the (F.D.U) with the venturi were 99 ,
75 and 88% and with using Pressure differential tank
were 86 , 88 and 96% for the lateral lengths of 20 , 40
and 60m respectively.