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Study of the volume and

life of watermelons

Full study

The purpose of this study is to determine, for each type of treatment, the volume obtained from a specific amount of watermelons, the life of these by studying the amount of galacturonase present and the delay of maturation.

Treated: sample O

Control: sample X

Data sample O:

Tieme (H)pHCEBrixNTNH3+NH3
05.0563.22381.41.76.1
245.0253.4568.16.6829.1
484.7674.3587.38.932.8
723.974.8757.4932.8

Data sample X:

Tieme (H)pHCEBrixNTNH3+NH3
05.1213.4487.50.813.7
245.1353.9757.54.35.218.8
484.6564.4954.45.319.5
723.874.744.74.95.921.5

If we compare at the foot of the field the Kg per plant obtained in both cases, the plants of group O produce 1,3 Kg more.
By comparing the starting weight and the amount of juice obtained, we can obtain the percentage of juice with respect to the total fruit. This shows that in sample O 50,07 % of the fruit is juice and 49,93 % is pulp and bark. For sample X, 43,84 % is juice, compared to 56,16 % pulp and bark.
In terms of total nitrogen concentrations, this is directly proportional to the amount of galacturonase present in the fruit, an enzyme that accelerates the degradation of the fruit, making the useful life of the fruit less to greater increase of total nitrogen.
Thus, when comparing the concentrations of total nitrogen, it is observed that the X sample has a lower concentration (0.8 mg/L freshly liquefied), however, over time it suffers a more noticeable increase, being at 72h 6.13 times the initial value.
Sample O, on the other hand, has a higher initial total nitrogen concentration (1.4 mg/L), however, the increase in this sample at 72h is 5.3 times higher than the initial one.
As can be seen from the photograph on page 4, after the same time, the type X fruit is black moulded on most of its surface and has lost much of its juice, while the type O fruit is moulded, still white and with its juice almost intact.

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