Agriculture Reference
In-Depth Information
and 28.81 for K
2
O, respectively. The lowest FUE was 35.06for N, 92.88 for P
2
O
5
, and
23.74 for K
2
O, respectively, in gated pipe irrigation system (GPIS). These data are in
agreement with Baligar et al. [10]
and
Barbar [11]. In both seasons, the differences
were at P = 0.05 signifi cant both WU
S
E and WU
T
E among the irrigation systems.
The increase in FUE in DIS and LHBIS compared to FUE in GPIS may be attrib-
uted to negative effect of GPIS on MWD, aggregation%, IR, and soil salinity. FUE in
the 2nd season exceeded the FUE in the 1st season one due to age of grapevines and
the increase in yield (45.7-74.4%) according to irrigation systems overpassed that in
fertilizers applied (24.2-33.8%). In other wards 1% increase in fertilizer application
increased the yield by 2% under the experiment conditions.
20.3.6 EFFECT OF IRRIGATION SYSTEMS ON FRUIT QUALITY
The parameters for fruit quality were: Juice volume (cm
3
), TSS (prix number), sugar
percentage (prix number), cluster density (gm/cm
3
) and crop load.
Figure 20 shows the
juice volume
for both seasons. During 2002-2003 and in
drip irrigation system (DIS), it was highest (40.7 cm
3
), followed by low head bubbler
irrigation system (LHBIS, 39.8 cm
3
), while lowest value was 38.8 cm
3
in gated pipe
system (GPIS). The differences in juice volume between any two irrigation systems
were signifi cant at the 5% level.
FIGURE 20
Effect of irrigation methods on volume of juice of grape.
During 2003-20034 and in drip irrigation system (DIS), it was highest (46.9 cm
3
),
followed by low head bubbler irrigation system (LHBIS, 45.5 cm
3
), while lowest
value was 44.4 cm
3
in gated pipe system (GPIS). There were signifi cant differences
at 5% level in juice volume between DIS from one side and both LHBIS and GPIS
from the other side. High of juice volume in the fruit berries under DIS and LHBIS
Search WWH ::
Custom Search