First, the production of grape preservatives sulfite and color-changing silica gel can be used to make grape preservatives.
The sulfite may be selected from sodium sulfite, sodium hydrogen sulfite, sodium metabisulfite or potassium metabisulfite. Sulfite can slowly release SO2 gas after moisture absorption to achieve the purpose of antisepsis and preservation. The sulfite and discoloration silica gel are separately powdered and mixed in the ratio of sulfite:chromic silica gel=1:2, wrapped in a paper bag (or polyethylene film bag with pinhole), 3 per pack - 5 grams (the drug can also be sandwiched between the separators of the double-layer paper), placed in a grape box lined with a plastic film bag at a rate of about 0.3% of the weight of the grapes. The color changing silica gel is a moisture absorbent, and the effect of mixing in the sulfite is to absorb the surrounding water, prevent the sulfite from rapidly absorbing water, and concentrate the release of sulfur dioxide to prevent the agent from quickly failing and bleaching the grape.
Second, storage methods (1) variety selection and harvesting should be selected late harvest resistant species. When the content of soluble solids in the grape fruit is more than 16%, choose morning dew to dry or harvest in the evening.
(2) Pre-cooling, packing and adding anti-corrosion preservatives after harvesting, timely harvesting into the 0°C cold storage, and then removing the diseased fruit on the grape ears, when the grape temperature drops to 0 °C, Pack the carton with 0.03 mm thick polyethylene plastic film in time and place the grape antiseptic preservative.
(3) Storage management Suitable conditions for grape storage are: temperature - l ° C - 0 ° C, relative humidity 90%, oxygen 3% - 5%, carbon dioxide 3%.
(4) Antiseptic preservative treatment At present, the main agent used for grape antisepsis preservation at home and abroad is sulfur dioxide. Sulfite treatment or sulfur dioxide gas fumigation may be used, or SO2 grape fresh-keeping tablets may be used.
Source: Shaanxi Science and Technology News
The sulfite may be selected from sodium sulfite, sodium hydrogen sulfite, sodium metabisulfite or potassium metabisulfite. Sulfite can slowly release SO2 gas after moisture absorption to achieve the purpose of antisepsis and preservation. The sulfite and discoloration silica gel are separately powdered and mixed in the ratio of sulfite:chromic silica gel=1:2, wrapped in a paper bag (or polyethylene film bag with pinhole), 3 per pack - 5 grams (the drug can also be sandwiched between the separators of the double-layer paper), placed in a grape box lined with a plastic film bag at a rate of about 0.3% of the weight of the grapes. The color changing silica gel is a moisture absorbent, and the effect of mixing in the sulfite is to absorb the surrounding water, prevent the sulfite from rapidly absorbing water, and concentrate the release of sulfur dioxide to prevent the agent from quickly failing and bleaching the grape.
Second, storage methods (1) variety selection and harvesting should be selected late harvest resistant species. When the content of soluble solids in the grape fruit is more than 16%, choose morning dew to dry or harvest in the evening.
(2) Pre-cooling, packing and adding anti-corrosion preservatives after harvesting, timely harvesting into the 0°C cold storage, and then removing the diseased fruit on the grape ears, when the grape temperature drops to 0 °C, Pack the carton with 0.03 mm thick polyethylene plastic film in time and place the grape antiseptic preservative.
(3) Storage management Suitable conditions for grape storage are: temperature - l ° C - 0 ° C, relative humidity 90%, oxygen 3% - 5%, carbon dioxide 3%.
(4) Antiseptic preservative treatment At present, the main agent used for grape antisepsis preservation at home and abroad is sulfur dioxide. Sulfite treatment or sulfur dioxide gas fumigation may be used, or SO2 grape fresh-keeping tablets may be used.
Source: Shaanxi Science and Technology News
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