poster - International Conference of Agricultural Engineering

6
Number of leaves
9
8
7
6
5
4
3
2
1
0
y = -0,0024x 2 + 0,4276x - 11,895
R 2 = 0,9286
y = -0,0043x 2 + 0,7324x - 23,105
R 2 = 0,9894
60 70 80 90 100
Solo
Formosa
Available water in soil (%vol)
Figure 3. Number of leaves of papaya Solo and Formosa group as a function of available water in soil
The dry matter accumulation by shoots of seedlings increased as a function of soil moisture,
up to an estimated level of 83.2% with 2.3 g per seedling in genotype Solo and 2.6 g per seedling in
the soil with 100% field capacity by a Formosa of papaya seedlings (Figure 4). In general, the
accumulated water deficit caused the temporary wilting at times of higher temperature of some
plants, affecting their physiology and consequent decrease in biomass production.
3,0
Shoot dry matter (g plant -1 )
2,5
2,0
1,5
1,0
0,5
y = -0,0005x 2 + 0,1035x - 2,9739
R 2 = 0,93
y = -0,001x 2 + 0,1667x - 4,3574
R 2 = 0,8585
Solo
Formosa
0,0
60 70 80 90 100
Available water in soil (% vol)
Figure 4. Shoot dry matter of seedling of papaya Solo and Formosa group as a function of available water in
soil
Except for treatment with humidity at 100% of field capacity, where the values are similar
between the two genotypes, the Solo papaya plants produced more dry mass of roots with
increasing soil moisture in relation to Formosa (Figure 5). Comparing the values shown in Figures 4
and 5 showed that both genotypes produce more dry roots (2.6 and 2.3 g seedlings -1 ) that shoot
(6.1 and 6.2 g seedlings -1 ).