The kiwifruit with different varieties and varieties is familiar with the difference in antifreeze capacity. In the main fresh kiwifruit in Xi'an area, the freeze-thaw resistance of Chinese kiwifruit is not as good as that of delicious kiwifruit. In Chinese kiwifruit, "Golden Fruit", "Xi Xuan No.2" and "Hong Yang" have poor anti-freezing ability, especially the "Golden Fruit" kiwifruit autumn shoots have not stopped in October. This part can not be normal and mature autumn tip winter Frozen. The "Xu Xiang" in delicious kiwifruit is less frost-resistant. Therefore, in the areas that are vulnerable to freezing, the antifreeze variety in delicious kiwifruit should be selected as much as possible. Grasping the topography From the point of view of kiwifruit growing areas, the parks closer to the towns are affected by the urban microclimate, and are generally lighter in weight. In the northwest, the cold air passes through the area, there is no shelterbelt, there is no shelter area in the village, or the northwest wind is blocked by the Qinlingshan cyclone wind gathering area. Freezing damage is prone to occur, and the cold damage in the low-lying area is heavy. After clearing the white trees, the clear garden will begin to clear the garden. The whitening agent should be dry and wet to a moderate degree. It is advisable to hang the tree evenly when brushing. It is best to apply the entire main cranium and remember to paint the yin and yang face so as not to reach the antifreeze effect. Rational management of the kiwifruit tree's early management has a great impact on the freezing resistance of the vines. When pruning, pay attention to the following types of non-tolerant twigs: pests affecting early deciduous branches; malnutrition; severe yellow flower branches; autumn rain plus Excessive application of nitrogenous fertilizers, prosperous new shoots at the end of the season; weeds in the garden with multiple weeds, soil compaction, and canker diseases; summer pruning is not timely, lack of light, curled branches at the front end; excessive load, large quantities of shoots with bulking agents; Harvesting is not timely to restore the tree branches. Trunk Protection Kiwi trees are mostly frozen in the main vine is about 80 cm away from the ground, so the protection of the main vine is particularly important. The materials used to wrap the main vines include: straw, corn stalks, waste cotton, waste newspapers, etc. When choosing, it must be adapted to local conditions. The time to release the main protection can be carried out after the budding. It is easy to lose water in the rhizomes of kiwifruit trees that cover the soil and cover the grasses in winter, and it is easy to be frozen when the temperature is strong and low temperature. The height of the soil is generally higher than 20 cm above the surface of the tree plate. Straw can be used to cover the tree plate with straw, to ensure the temperature around the tree plate. Other protection 1 Electronic fogger with a set of 10 acres of ground, no need to guard in the field, no need to manually detect the temperature, set the temperature automatically smoke, intelligent control, automatic retrieval of orchard environmental temperature. 2 The recent forecast of strong low-temperature weather, the kiwi fruit orchard can be sprayed with lime sulfur, or antifreeze. 3 After the occurrence of frost damage, prepare the antifreeze sprayed during the budding period for repair and protection. Guangzhou Zhongzhinan Supply Chain Co.,Ltd. , https://www.gzzhongzhinan.com
Obtaining forecasts The freeze damage of kiwi trees occurs most often in the winter or spring sap flow, and is also prone to frost damage during the snowmelt period after snowfall. Therefore, we must grasp the weather forecast in time and do a good job in contingency planning.
On November 18th, “2016 Kiwi Frost Damage Prevention Work Conference in Xi’an, Shaanxi Province†was held in Yujia Village, Jiufeng Town, Zhouzhi County. At this meeting, Zhang Xinxin, director of the Xi'an Forestry Technology Extension Center and senior agronomist Zhang, gave a comprehensive and detailed explanation of the antifreeze technology of winter kiwifruit from eight aspects. The brief summary is as follows: