BTE Hearing Aid BTE Hearing Aid Shenzhen Sunshine Technology Co.,Ltd , https://www.szyatwin.com
Half underground cellar storage
The use of semi-basin storage of grapes, to the end of April the second year still maintains a bright color, delicious taste, not inferior to the grapes harvested in summer and autumn, not only solves the problem of concentrated sales, but also improve economic efficiency 3-5 times. The cellar of the cellar should be constructed in a slightly elevated and well-ventilated place. Cellar east-west direction, semi-underground, volume is generally 20-30 cubic meters is appropriate; the east end of the pit is set to a high, wide 40-50 cm in each vent, for the initial cooling period of storage and cooling. The front and rear walls are each equipped with a 3040 cm vent hole. The cellar roof is provided with a 90- to 100-centimeter high-height window with a length and width of 60 centimeters each. The air-holes are to be fitted with window sashes and iron nets for ventilating, exhausting and preventing rat damage. The walls of the cellar were plastered with cement and the bottom of the cellar was covered with 4-6 cm thick sand to adjust the temperature. The cellar is made up of coarse bamboo scaffolds with a shelf spacing of 40-50 cm. The cellar can store 750-1000 kg of grapes. Timely picking before and after the frost, choose a grape ear that is fully mature, free of pests and diseases, and has no mechanical damage. Cut it with scissors and keep the stem 10 centimeters or so. After careful removal of diseased grains and blue grains, immersed in a mixed aqueous solution of 0.2% calcium chloride and 0.2% trehalose. After 2 hours, remove and dry them and hung them on the rack or in the basket for storage. Strengthen the management of the grape into the cellar, according to every cubic meter of space with 20 grams of sulfur powder sealed fumigation for 30 minutes, and then open the air hole, exhaust emissions, after every 7 days per cubic meter of 10 grams of sulfur fumigation for 30 minutes and exhaust emissions. When the cellar temperature falls below 5 degrees Celsius, it is fumigated every 20 days or so. After the cellar temperature rises in March-April, fumigation once a week can be resumed. In the early stage of entering the cellar, night low temperature can be used to cool the ventilation, the cellar temperature is controlled at 7-9 degrees Celsius, and the relative humidity is 85%-90%. About 30 days after entering the cellar, with the decline of the outside temperature, the cellar temperature can easily be controlled at about 5 degrees Celsius, and the relative humidity is between 80% and 85%.
Next Article
Livestock and poultry breeding new tricks
Prev Article
Loofah high yield cultivation techniques