Familiar with different varieties, different varieties of kiwi fruit have great differences in antifreeze ability. Among the main fresh kiwifruits in Xi'an, the general Chinese kiwifruit is not as cold resistant as delicious kiwifruit. The "golden fruit", "Xi Xuan No. 2", and "red sun" in Chinese kiwi have poor anti-freezing ability, especially the "golden fruit" kiwi autumn shoots have not stopped in October. This part of the kiwi fruit is not normally mature and the autumn shoots are easy to grow in winter Frozen. "Xuxiang" in delicious kiwi is less resistant to freezing. Therefore, in areas that are susceptible to frost damage, try to choose frost-resistant varieties in delicious kiwi as much as possible.
Mastering the terrain From the perspective of the kiwi growing area, the parks closer to the town are affected by the microclimate of the town and generally have low freezing damage. Cold air transits in the northwest direction, no shelter forests, no village sheltered areas, or areas where the northwest winds are blocked by cyclones in the Qinling Mountains. Frost damage is easy to occur, and low-lying land is more severely damaged.
Obtaining the forecast Frost damage of kiwi trees mostly occurs in deep winter or spring after the sap flows, and it is also prone to frost damage during snowmelt after snowfall. Therefore, it is necessary to grasp the weather forecast in time and make a contingency plan.
The clearing of white trees in the clearing garden will begin the clearing work. The whitening agent should be moderately dry and wet, and it is advisable to hang the tree evenly when brushing. It is best to apply the entire main vine, and remember to apply a yin and yang face to avoid the effect of preventing frost.
Reasonable pruning of the kiwi tree body has a great impact on the frost resistance of the vines. When pruning, pay attention to the following types of non-freezing vines: disease and insects affect early deciduous branches; malnutrition and severe yellow flowers; Excessive application of nitrogen fertilizer, strong new shoots in late stages; weeds, soil compaction, and ulcer-prone garden branches; inadequate pruning in summer, insufficient light, and tangled curly branches at the front end; excessive loads, branches that use bulking agents; delay Harvesting, branches that are not restored in time.
Trunk protection The kiwi tree is mostly frozen about 80 cm from the ground, so the protection of the main vine is particularly important. The main materials for wrapping the main vines are: straw, corn stalks, waste cotton batting, waste newspapers, etc., which should be selected according to local conditions. The time to release the protection of the main vine can be performed after the bud.
Part of the roots and stems of kiwi trees cultivated with soil is prone to dehydration during drought in winter, and it is easy to be frozen under strong low temperature. The height of soil cultivation is generally more than 20 cm higher than the ground of the tree tray. If there is straw, the tree tray can be covered with straw to ensure that the temperature around the tree tray can be adjusted.
Other protections â‘ Equipped with a set of 10 acres of electronically controlled fog machines, no need to squat in the field, no need to manually detect the temperature, set the temperature to automatically emit smoke, achieve intelligent control, and automatically retrieve the orchard environment temperature. â‘¡ In the near future, when the strong low temperature weather is coming, you can spray the kiwi orchard with stone sulfur mixture or antifreeze again. â‘¢ Prepare antifreeze for spray protection during sprouting period to repair and protect after freezing damage.
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