poster - International Conference of Agricultural Engineering

Ia =
n × v
ec
Equation 3
which:
Ia = intensity of application (mm h -1 );
n = number of emitters per plant;
v = emitter flow (L h -1 );
ec = area occupied by the plant (m 2 ).
Ti =
LB
Ia
Equation 4
which:
Ti = Irrigation time (h);
LB = gross water depth (mm day -1 );
Ia = intensity of application (mm h -1 ).
The irrigation system used in the experiment was located, by dripping, consisting of
two tapes per line with emitters with 1.3 L/h of flow, equidistants of 0.30m, equivalent to 12
per plant.
2.5 Analised Variables and Statistical Analysis
Properly identified, for treatment, fruits were counted and weighed on digital scales of
0,01g precision for determination of fruit weight, fruit number per plant and productivity.
These measurements were made individually for each fruit. Analysis of variance for each
variable for the F test, until 5% of significance and their respective regression models were
adjusted according to the coefficient of determination (R 2 ) (STORCK et al., 2000).
3. Results and Discussion
The irrigation depth had no consistent effect on the number of fruits per plant (NF)
and productivity (P). For the variable fruit mass (MF) it showed significant differences at the
1% level of probability for F Test.
It can be seen in Figure 2 tendency of superiority of the mean weight of fruit of 0.92
kg treated with 100% ETo, presenting a reduction after this level of 4.3%. The lowest mean
weight (0.73 kg) was obtained by applying 50% of ETo, especially noting an increase of
20.6% when the irrigation depth ranged from 50 to 100% of ETo.