After the fruit is harvested from the greenhouse, if it is improperly managed, problems such as leaf curling, aging and scorching will easily occur, and pests and diseases will easily cause early defoliation. This is the critical period for the differentiation of cherry flower buds. If the leaves are aged or fall off prematurely, they will cause poor flower bud differentiation (small number and poor quality), and will cause the phenomenon of “second flowering†and seriously affect the yield in the second year. . Then how to manage the shed cherry after harvest?
First, fertilizer and water management after fruit harvest
1, scientific fertilization
After fruit picking, it is also known as "monthly child fat." The fruit growth and flower bud differentiation consumes a large amount of nutrients in the tree body, and the tree vigor needs to be restored after fruit harvesting. Guoguang Songer Fertilizer should be pursued in a timely manner to supplement nutrients needed for restoration of tree vigor and flower bud differentiation. However, it should be noted that nitrogen fertilizers should be used less at this time, and excessive nitrogen application can lead to excessive growth of branches and waste of nutrients. In addition, because of the fruit and the pruned branches and leaves in summer, a large amount of trace elements are taken away, which can be supplemented by Guoguangluo Micro or Zhuangduo to prevent the occurrence of deficiency.
2, reasonable watering
Cherry roots are not tolerant to pods, frequent watering or raining in the shed for a long time will not affect the normal growth of the root system, and even lead to root rot.
In order to ensure the normal growth of cherry and flower bud differentiation, appropriate water or water control should be based on soil moisture. Watering can be done by furrow irrigation, pit irrigation, drip irrigation, etc. During the rainy season, ditches can be dug out to drain the rain out of the shed.
Second, control the promotion of flowers
1, summer trim
After harvesting the fruits, the tree vigor can be controlled by growing branches, cutting shoots, and picking the heart during the growth period pruning method to promote flower bud differentiation. However, artificial pruning takes time and labor, and it is easy to miss the key time.
2, chemical control Wang
For trees that are over-strengthened, they can be sprayed with Guoguang Chlorella, Methedoxin, or Uniconazole to control and promote flowers. Chemical control Wang has the characteristics of saving time and labor, and is easy to operate.
In general, the combination of summer pruning and chemical control prospering is a great way for big cherries to control flower growth.
III. Pest Control
1. Disease prevention and treatment
After the fruit is harvested, it mainly controls brown spot, anthracnose, and bacterial perforation, and failure to prevent and control will cause early deciduous cherry trees. For the brown spot disease can be used to control the country cursor health, anthrax can be used prochloraz, difenoconazole, etc. for prevention, bacterial perforation can be methamphetamine prevention.
2. Pest control
The pests that damage cherry trees after fruit harvesting include red-and-white spiders, scale insects, and long-horned cows. Especially the long-horned beetles and the beetles make the cherry growers hate them. For the scale insects, we can choose Guoguangzhizhi, spirotetramat, etc. for prevention and control; red and white spiders, can be used to prevent and control Guoguang enemy dead (fenflurazine); for Tianniu, can be manually captured or in production Eggs inspected the branches and killed the eggs in the spawning tank. The trunk was sprayed with Guoguang Songer Liquid Membrane to block or avoid it.
Four, shallow turning the soil
After the fruit is picked, remove the black mulch in time and turn the soil properly (less than 20 cm). This can improve the ventilation of the soil, avoid soil compaction, promote root growth, and increase nutrient utilization. Be careful not to hurt big roots when turning the soil.
Fifth, let the wind exercise
After harvesting, the greenhouse cherries have a large difference between the outside temperature and the shed temperature. If the membrane is removed too early or too soon, the temperature change will be too large, which will lead to tree growth disorder and affect the flower bud differentiation. Therefore, it is necessary to conduct exhalation exercise before the outside temperature reaches the growth temperature of the tree in the greenhouse, and then remove the membrane after 15-20 days of exercise. When the film is removed, the outside temperature should not be lower than 15°C on average, and the exhalation exercise time can not be less than 15 days. .
Sixth, reversing leaves and promoting flower bud differentiation
After harvesting the fruit, in the summer due to high temperature and drought, the leaf water evaporation is greater than the absorption, making the cherry leaves severe water loss, leaf curling, edges dry, and some even the entire leaf scorch; and high temperatures will lead to large cherry pistil Over-differentiation, the formation of "multiple births" phenomenon.
In order to reduce the impact of adverse climate factors such as high temperature and drought on the differentiation of cherry leaves and flower buds, the whole tree can be sprayed with Guoguang Power + Luokang after harvesting to induce stress-resistant gene expression of cherry trees and supplement nutrients needed by the tree. The phenomenon of curling and scorching of leaves caused by high temperature and drought was alleviated, and the probability of malformed fruit in the coming year was reduced.
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