In early August, Shaanxi Huaping, Heyang, Linyi, Pucheng, Fufeng, Fengxiang, Tongchuan, Luochuan, Yichuan, Fuxian, etc., set of paper bags of fruit-wrapped apples entered the unpacking period. Wei Lixin, a senior agronomist at the Jinwang Fruit Tree Professional Cooperative in the county, said in an interview with reporters: “As for the time taken to pick up apples and other precocious apples, some fruit growers cannot always grasp the timing. The yellow price is low."
Wei Lixin said that because most of the time the fruit growers take out bags is based on the "yellow calendar" card days in previous years. This year's climate is unique. First, the temperature in the spring is low, and the apple blossoms about 5 days later than in previous years. This means that according to the time of previous years, the period of fruit development will be less than 5 days, and the fruit will certainly be smaller than the same period of previous years; second, there will be a “闰 闰 June†year, and “the dog days†will be longer than in previous years. For 10 days, this means that after the bag is taken out, there may be a climate where the “high temperature and drought and the temperature difference between day and night†are unfavorable.
When the apple breaks
It has been observed that the suitable bag-discharging period for apples in Weibei, Shaanxi province generally begins on July 20 and ends on August 5. However, in Heyang, Fengxiang, Tongchuan, Luochuan, Yichuan, etc., 800 to 1000 meters above sea level in the eugenic area, Qinyang, Zaohong, and other susceptible coloring varieties are proposed to be postponed to August 2 this year, Golden Century, Fu Tao, Li It is advisable to postpone the use of the more easily pigmented varieties such as 嘎 嘎 嘎 and Royal 至 至 to August 3 to August 8. The general principle is: In the appropriate period, 3 days or 3 days after the bag is removed, it must be determined by the variety of tree, fruit, and day. Easy to color varieties early, difficult to color varieties late; tree vigor is appropriate early, tree vigor is appropriate late; bleaching is good early, off white is bad; rain to unequal, when it is not the same; rainfall is cold Cool as soon as possible, hot and dry properly late.
Orchard has good grass or no grass
As we all know, under the premise of better bleaching, temperature and humidity are important factors affecting fruit coloring. Relevant data show that the temperature difference between day and night after bagging is greater than 10°C, which is beneficial to the coloring and sugar-enhancement of apples. The orchard has relatively high humidity and exposed fruit. The coloring speed is relatively fast and bright. It can be seen that the high-temperature grass orchards can both reduce the temperature and increase the humidity, which is definitely better than the ploughing. Because no grass is 5°C to 10°C warmer than the orchard's orchard, the higher the temperature, the greater the fruit's respiratory depletion, the poorer sugar accumulation, and the difficulty in coloring; the orchard's orchard not only reduces the orchard's temperature, but also the rainfall. Or after watering, there is dew on the grass. The temperature difference between day and night in the orchard and the air humidity are also relatively large. However, natural grass gardens must be reasonably controlled, and it is best to cut them once in 10 days before the bags are removed. When it encounters high temperature and drought, it can be watered properly after mowing. After the bag is taken out, the best hairy young grass can grow on the surface. The ploughing gardens encountered drought and watered properly the week before bagging, which was beneficial to the promotion of fruit enlargement, and was also conducive to long grass growth and coloration after bag removal.
Watering before bagging or watering after bagging
Wei Lixin believes that in the event of high temperature and drought, the watering before 10 days of bagging is definitely better than watering after bagging. From late July to early August, it is the hottest period of the year, timely irrigation before bag-breaking, which can not only improve the soil water supply and temperature and humidity in the orchard, but also alleviate the damage caused by drought and high-temperature heat damage to fruit trees, and promote fruit enlargement and coloring. . However, it should be noted that whether it is pouring out before the bag, or after the bag is poured, the weaker tree-climbing garden has more cracks in the shoulder than in previous years. Some areas of the primordial arable land, if there is no watering condition, can also spray water at the canopy after 6 pm every day to reduce the temperature and increase humidity, improve the orchard's microclimate, and mitigate the damage caused by high temperature and direct solar radiation on the trees and fruits.
After the bag is covered with reflective film, it is still not covered
After the fruits have been taken out of the bag, it is an important measure to produce full-colored fine fruit with a reflective film under the canopy. However, suitable areas such as Fuping, Linyi, Pucheng, South Heyang, South Chengxian, and Fufeng, which are below 700 meters above sea level, must be adapted to the park. Because this year the United States gossip after the apple bag bagging is in the middle, the width of the line, weak tree, strong light orchard shop after the reflective film, the case of high temperature above 40 °C weather, it is easier to increase the yellow and sunburnt fruit surface The occurrence of other physiological diseases.
In Heyang and Chengxian County North, Tongchuan, Fengxiang, Luochuan, Yichuan, Yanchang, Fuxian, etc. The altitude is 800 meters above the eugenics area. The pods are relatively late for the apples. The coloring period has reached the beginning of the autumn and the temperature is relatively cold. cool. After the bags are put on the reflective film, the sunburn rate of the strong tree is very low. The reflective film should be used as a necessary measure to increase the red fruit quality and increase income.
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