After bag removal, the temperature difference is less than 5 degrees and no coloring. Temperature is less than 10 degrees, almost no coloring; temperature difference more than 10 degrees, the faster the color. However, in the fruit area above 1000 meters above sea level, the temperature difference is 14 to 17 degrees after the bags are picked in late September or early October, so the temperature difference is faster and faster.
Humidity affects the speed of coloring. Practice has proved that air is high in humidity and fast in color, and it is the same regardless of altitude. Yantai, Hebei Qinhuangdao fruit area, only tens of meters to more than one hundred meters above sea level, still fast coloring. This is because they are oceanic climates, and the air is very humid, so they are colored quickly. Regardless of altitude, air drying, coloring is slow. There is no temperature difference between humidity or small temperature difference, coloring is not fast, large temperature difference but no humidity is also slow to color. Therefore, the temperature difference and the humidity are also large and the coloring will be quick.
The temperature difference within 5 days after bag removal determines the speed of coloring
Listen to the weather forecast before picking the bag: The temperature difference within 5 days is greater than 10 degrees before picking the bag. Practice has proved that the temperature difference within 5 days after bag removal is less than 10 degrees without coloring. Even if there is a temperature difference after 5 days, the color is not good.
Do not remove bags when the temperature is too high
Practice has proved that: 30 degrees during the day, 35 degrees, 10 degrees at night, 15 degrees, 20 degrees difference in temperature, coloring is not fast. 15 degrees during the day, almost no coloring at 2 degrees and 3 degrees at night. About 25 degrees during the day and around 10 degrees in the evening, the coloring is fastest. This is because the temperature suitable for leaf function is 18 degrees to 30 degrees, and the strongest leaf function temperature is about 25 degrees. There are many reasons for synthesizing sugars, so they are faster to paint.
Practice has proved that: first pick the outer layer of the paper bag, then pick the inner bag after 3 days, and the fruit has an adaptation process. Not in a dark environment, suddenly exposed to direct sunlight, especially pure paper bags, 2 bags more than a bag picking.
Stop picking bags when the temperature is too high at noon
First take off the bags and then pick up the bags to prevent them from falling. Pick the bags in the morning and collect the bags in the morning. Pick the bags in the afternoon. It is best to pick cloudy or cloudy bags. Stop picking bags when the temperature is too high at noon.
Underground humidity also determines the speed of coloring
Proper drought is conducive to coloring, too much water to affect color, too dry to color is not good. Don't pick the bag when the wind blows. The peel is old and affects the color.
Immediately after the bag was picked, the medicine was added once with calcium, which means that the fruit was prevented from infecting the bacteria and nourishing. It can also prevent the occurrence of water cracks and increase the commodity rate. Picking bags should not be too early, but it should not be too late.
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