Climatic Division of Actinidia chinensis Plantation in Guizhou Mountainous Area

Climatic regionalization of kiwifruit cultivation in mountainous areas of Guizhou

1 the necessary conditions for growing Actinidia chinensis

1.1 Thermal conditions

The cultivation of kiwifruit needs certain conditions, the more suitable the conditions are, the better the planting effect will be. If the climate is not suitable, the results will not be satisfactory. Therefore, before planting, it is necessary to evaluate the mountain conditions in Guizhou, but it is more important to investigate the planting conditions of kiwifruit in detail in order to grow high-quality kiwifruit. Heat condition is an important factor affecting the cultivation of red kiwifruit. According to the records of planting red kiwifruit in China, it shows that red kiwifruit is suitable to be planted in areas with high altitude and cool climate. When the temperature is 14-16 ℃, the growth of kiwifruit is the fastest. When the temperature is higher or lower than this temperature, it will have a certain inhibitory effect on the growth of kiwifruit. When the temperature is below 10 ℃, the flowering time of the fruit tree will be delayed, and the branches are easy to fester. When the temperature is higher than 16 ℃, the fruit tree will blossom earlier, but it is not good for the normal growth of the fruit tree, because the early flowering of the fruit tree will lead to certain resistance to the fruit growth. The lower the temperature, the greater the risk of freezing damage to fruit trees, which may lead to death in severe cases. Therefore, air temperature is an important factor affecting the growth of kiwifruit. When choosing the planting area, we should first investigate the local temperature to ensure the normal growth of kiwifruit.

1.2 Water condition

Red kiwifruit has higher requirements for water. First of all, red kiwifruit trees are not resistant to drought and are suitable to grow under warm and humid conditions. Secondly, too much water is not conducive to the growth of fruit trees, therefore, the amount of water for red kiwifruit trees should be controlled within a certain range. The suitable precipitation for fruit trees under normal conditions is 1000~5000mm. In dry and rainless areas, the growth of kiwifruit will be hindered, so when choosing planting areas, it is necessary to test the local precipitation. April is the fruit-setting period of fruit trees, if there is not enough rainfall or too much rainfall will have a great negative impact on the growth of fruit trees. June is the peak of water demand for fruit trees, and the precipitation should at least be kept above 250mm in order to ensure the normal growth of fruit trees. If there is too much precipitation during the growth period of fruit trees, it will lead to root fester, breeding of diseases and insect pests, and even death in serious cases. Therefore, it is necessary to choose a suitable place to plant fruit trees according to the precipitation needs of fruit trees.

1.3 Lighting conditions

Light is an important factor affecting the growth of red kiwifruit, because fruit trees need photosynthesis, so light is the driving force that determines the growth of kiwifruit. When the red kiwifruit tree is in the seedling stage, it is in the shade-tolerant stage, and there can not be too strong direct sunlight, because the fruit tree can not accept too strong light during the seedling stage, which may lead to the loss of water and yellowing of the leaves of the fruit trees. it may also cause burnt fruit. On the other hand, adult fruit trees are in a shady and humid environment and need sunlight to carry out photosynthesis. therefore, the most suitable place for red kiwifruit trees to grow is the cool place with sunlight, which can not only avoid the damage of fruit trees under the strong sunlight, but also meet the normal needs of fruit trees.

2 discussion on the suitable planting area in Guizhou

On the basis of the above research results, it is necessary to investigate the conditions of different places in Guizhou mountainous areas and select the most suitable areas for planting red kiwifruit trees in Guizhou mountainous areas. At present, it can be divided into the most suitable area and the sub-suitable area.

2.1 the most suitable planting area

In the mountainous areas of Guizhou, the western region is the most suitable area to grow kiwifruit. In terms of heat, the heat of the western region is closest to that of planting red kiwifruit trees; in terms of precipitation, the precipitation in the western region is more in April and June, which can meet the needs of the normal growth of red kiwifruit. In other months, the precipitation can also be met, and there are few floods in the western region, so there is no need to worry about excessive precipitation. In terms of light conditions, the light in the western region has not been exposed all the year round, and the light is sufficient in March and April, which will not cause burns to the leaves of fruit trees. In addition to the above conditions, the temperature difference between day and night in western Guizhou is relatively large, which is beneficial for fruit trees to accumulate nutrients and increase sugar content. The western region of Guizhou is the main planting area of kiwifruit.

2.2 suitable planting areas

Red kiwifruit is not only the most suitable for planting in the western region of Guizhou, but also suitable for planting in sub-suitable areas, such as generous, Liuzhi, most of Zhenning, Qingzhen, Ziyun north, Congjiang, Leishan, Puan and other areas. these areas are also suitable for planting red kiwifruit trees. The low temperature in winter is not conducive to the safe winter of red kiwifruit, so it needs to be planted on the windward sand slope, which can protect the red kiwifruit trees to a certain extent.

3 Summary

The cultivation of kiwifruit needs certain conditions, the more suitable the conditions are, the better the planting effect will be. If the climate is not suitable, the results will not be satisfactory. Therefore, before planting, we need to evaluate the conditions in Guizhou mountain areas, but it is more important to investigate the planting conditions of kiwifruit in detail, so that we can grow high-quality kiwifruit. Heat condition is an important factor affecting the cultivation of kiwifruit. According to the records of planting of kiwifruit in China, a lot of data show that kiwifruit is suitable for planting in areas with high altitude and cool climate. Due to the global warming, the climatic suitability zoning of kiwifruit should be constantly updated in order to fully reflect the actual demand for climatic conditions for the cultivation of kiwifruit. In the future, the effects of different growth periods and meteorological yields of kiwifruit on climatic factors will be further studied. The analysis and research of this paper can provide some guidance and reference for relevant practitioners.