Agriculture Reference
In-Depth Information
17.2 MATERIALS AND METHODOLOGY
According to the methodical recommendation as to the storage of fruits, vegetables,
and grapes [10], the experiments were carried out in the refrigerator of the Technology
storage and processing of fruits and vegetables Сhair at Uman National University
of Horticulture in 2011-2013; the berries of such cultivars as 'Festyvalna romash-
ka' (control), 'Ducat,' 'Honey,' grown on various types of soil management, without
mulching (control), mulching of the rows with black polyethylene and black agro-
cloth, were used in the experiment.
Strawberries were harvested at a marketable stage, and selected in accordance with
GOST 6828-89 [11]. Chilled berries of the fi rst marketable cultivar were put into per-
forated plastic boxes (0.5 kg), then packed into polyethylene bags (the thickness of a
fi lm is 50-60 μm) and hermetically sealed. Berries were stored at temperature 0 ± 1°С
and relative air humidity 90-95 percent during 11 days. Natural mass loss, market-
able indicators, and variation of a berry chemical composition were determined in the
course of the trial.
Marketable analysis of the strawberries after the storage was made in compliance
with GOST 6828-89; natural mass loss was defi ned by weighing fi xed samples.
The content of dry soluble substances was determined by refractometric method
(GOST 28562−90), [12] that of sugars by ferrocyanid method (GOST 8756.13-87),
[13] acidity by titrating alkali ( GOST 25555.0-82), [14] ascorbic acid by iodine-
metric method (GOST 24556-89 [15] Statistic analysis was done using StatSoft STA-
TISTICA 6.1.478 Russian, Enterprise Single User (2007).
17.3 RESULTS AND DISCUSSION
As the result of the experiments indicate, it was found that strawberries accumulated
9.5-10.6 of dry soluble substances, 5.6-9.5 percent of sugars, 0.75-1.1 percent of
organic acids, 55.1-99.8 mg/100 g of ascorbic acid; it depended on the cultivar and
cultivation condition (Table 17.1).
High content of dry soluble substances was typical for the strawberries grown
without mulching—10-10.6 percent; this indicator for the strawberries grown on the
mulched soil (black fi lm) was lower by 0.5-1.6 percent. The strawberries of 'Honey'
cultivar had the largest amount of dry soluble substances—10-10.6 percent among all
the cultivars studied, which depended on the mulching type.
The strawberries grown without mulching accumulated the largest amount of sug-
ars—6.4-9.5 percent, whereas the strawberries grown on mulched soil in the rows
(agro cloth) had less sugars by 0.8-3.9 percent. The strawberries of 'Honey' cultivar
had the largest amount of sugars—6.5-9.5 percent, depending on the cultivation con-
ditions (Table 17.1).
 
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