Method for improving grafting survival rate of kiwi fruit rootstock

Abstract

The invention discloses a method for improving the grafting survival rate of kiwi fruit rootstocks, and belongs to the technical field of kiwi fruit variety branch grafting. According to the method, kiwi fruit rootstocks and delicious-series seedling rootstocks are subjected to bridging, double-root-system cultivation is achieved, after bridging, kiwi fruit variety branches are grafted to the delicious-series kiwi fruit seedling rootstocks, and the kiwi fruit rootstocks are grafted to the delicious-series kiwi fruit seedling rootstocks. After grafting, the seedlings are planted in an orchard. The method is beneficial for improving the grafting survival rate of the kiwi fruit rootstock.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kiwifruit variety branch grafting, and particularly relates to a method for improving the survival rate of kiwifruit rootstock grafting. BACKGROUND

[0002] In the field of kiwifruit planting, the traditional grafting cultivation method mainly relies on single variety rootstock for grafting. However, this method has many limitations and problems. Although the Actinidia callosa rootstock has strong root system, strong stress resistance and significant waterlogging resistance, its root growth depth is shallow, and it is difficult to root deeper in the soil, resulting in weak drought resistance. In the dry season or in the case of insufficient soil moisture, the grafted plants are easily affected by water deficiency, and their growth is inhibited, and even die, reducing the grafting survival rate and plant survival rate. The limitations of this single rootstock greatly limit the comprehensive performance of kiwifruit grafted seedlings, and it is difficult to meet the demand for high yield, high quality and sustained fruiting ability of modern kiwifruit planting. At the same time, the yield per mu and output value under the existing planting mode are relatively low, and it is difficult to achieve higher economic benefits, which brings many challenges to the development of kiwifruit industry. SUMMARY

[0003] As described in the above prior art, the purpose of the present application is to provide a method for improving the survival rate of kiwifruit rootstock grafting, which helps to improve the survival rate of kiwifruit rootstock grafting.

[0004] The purpose of the present application is achieved by the following technical solution: A method for improving the survival rate of kiwifruit rootstock grafting, a bridge is formed on the Actinidia callosa rootstock and the seedling rootstock of the delicious system, realizing double root system cultivation. After bridging, the kiwifruit variety branch is grafted on the seedling rootstock of the delicious system kiwifruit. After grafting, the seedling is planted in the orchard.

[0005] Further, before grafting, the kiwifruit variety branch is subjected to low temperature treatment to break dormancy and improve its growth potential after grafting. The variety branch is subjected to hormone treatment, such as application of auxin or cytokinin, to promote its combination with the seedling rootstock of the delicious system kiwifruit.

[0006] Further, in the early stage after grafting, the seedling is subjected to appropriate shading treatment to reduce water evaporation and improve the survival rate. In the late stage after grafting, the seedling is placed in a specific greenhouse environment, the temperature is controlled at 20-25°C, the humidity is controlled at 70-80%, and the light intensity is controlled at 5000-8000 lux, to promote its growth and recovery.

[0007] Further, the delicious kiwi fruit "Jin Kui" variety is selected as the intermediate stock, grafting is performed on the pair of calyx kiwi fruit stock, the branch of the delicious kiwi fruit "Jin Kui" variety is grafted onto the pair of calyx kiwi fruit stock, and the kiwi fruit variety branch is grafted onto the branch of the delicious kiwi fruit "Jin Kui" variety.

[0008] Compared with the prior art, the method has the beneficial effects that: The method for improving the grafting survival rate of kiwi fruit stock provided by the present application bridges the pair of calyx kiwi fruit stock and the delicious system seedling stock to realize double root system cultivation. After bridging, the kiwi fruit variety branch is grafted onto the delicious system kiwi fruit seedling stock. After grafting, the seedling is planted in an orchard. The pair of calyx kiwi fruit stock has strong root system, resistance and waterlogging resistance, but the root growth depth is relatively shallow, and it is not easy to grow deep roots in the soil, so the drought resistance is relatively weak. The delicious system stock is just the opposite, the root growth is relatively weak, but it is easy to grow deep roots in the soil. Through double root system cultivation, the root system of the pair of calyx kiwi fruit stock develops upward, and the root system of the delicious system stock develops downward. The delicious system stock has good affinity to the kiwi fruit variety branch, so the survival rate of the kiwi fruit grafting seedling can be greatly improved, which is beneficial to improving the yield, quality and continuous fruiting ability of kiwi fruit. Through double root system cultivation, the continuous production capacity of the orchard is improved, and the yield per mu during the high yield period can reach 8000-10000 kg. At the purchase price of 5-6 yuan / kg, the output value per mu can reach 40-60 thousand yuan, which is more than twice the existing planting mode.

[0009] The method for improving the grafting survival rate of kiwi fruit stock provided by the present application selects the delicious kiwi fruit "Jin Kui" variety as the intermediate stock, grafts the branch of the delicious kiwi fruit "Jin Kui" variety onto the pair of calyx kiwi fruit stock, and grafts the kiwi fruit variety branch onto the branch of the delicious kiwi fruit "Jin Kui" variety, which can effectively improve the grafting affinity of the pair of calyx kiwi fruit and the kiwi fruit variety branch, thereby improving the grafting survival rate of the kiwi fruit variety branch and the growth of the plant. DETAILED DESCRIPTION

[0010] In the following, the present application will be further described in conjunction with specific embodiments. It should be noted that, under the premise of no conflict, the embodiments described below or the technical features between them can be combined to form new embodiments.

[0011] Embodiment 1

[0012] The method for improving the grafting survival rate of kiwi fruit stock provided by the present application bridges the pair of calyx kiwi fruit stock and the delicious system seedling stock to realize double root system cultivation. After bridging, the kiwi fruit variety branch is grafted onto the delicious system kiwi fruit seedling stock. After grafting, the seedling is planted in an orchard.

[0013] In the early stage after grafting, the seedlings are appropriately shaded to reduce water evaporation and improve survival rate; in the later stage after grafting, the seedlings are placed in a specific greenhouse environment, with temperature controlled at 20-25°C, humidity at 70-80%, and light intensity at 5000-8000 lux, to promote their growth and recovery.

[0014] Shading treatment: In the early stage of grafting, appropriate shading treatment is carried out to reduce water evaporation and significantly improve the success rate of grafting.

[0015] Temperature control: The temperature is controlled at 20-25°C, which can provide the best growth conditions and help promote the growth and recovery of kiwi seedlings.

[0016] Humidity control: The humidity is controlled at 70-80%, which helps to maintain soil and plant water, reduce water evaporation, and improve survival rate.

[0017] Light intensity: The light intensity is controlled at 5000-8000 lux, which helps to provide sufficient light to promote photosynthesis while avoiding excessive light that can cause rapid water evaporation.

[0018] Comprehensive environmental management: Temperature, humidity, light intensity, and shading treatment are combined to form a comprehensive environmental management program. This comprehensive management program can significantly improve the survival rate and growth potential of kiwi variety branch grafting.

[0019] In this embodiment, before grafting, the kiwi variety branch is treated with low temperature to break dormancy and improve its growth potential after grafting; the variety branch is treated with hormones, such as auxin or cytokinin, to promote its combination with the seedling stock of the delicious system kiwi.

[0020] Example 2

[0021] This embodiment provides a method for improving the survival rate of kiwi grafting, which bridges the Actinidia callosa rootstock and the seedling stock of the delicious system, realizes double root system cultivation, after bridging, selects the delicious kiwi "Jin Kui" variety as the intermediate stock, grafts the Actinidia callosa rootstock, grafts the branches of the delicious kiwi "Jin Kui" variety onto the Actinidia callosa rootstock, and grafts the kiwi variety branches onto the branches of the delicious kiwi "Jin Kui" variety, and plants the seedlings in the orchard after grafting.

[0022] In this embodiment, before grafting, the kiwi variety branch is treated with low temperature to break dormancy and improve its growth potential after grafting; the variety branch is treated with hormones, such as auxin or cytokinin, to promote its combination with the seedling stock of the delicious system kiwi.

[0023] Embodiment 3

[0024] The embodiment provides a method for improving the survival rate of kiwi grafting, and the method comprises the following steps: bridging the Actinidia callosa rootstock and the seedling rootstock of the delicious kiwi, realizing double root system cultivation, grafting the kiwi variety branch on the seedling rootstock of the delicious kiwi after bridging, and selecting the delicious kiwi "Jin Kui" variety as the intermediate rootstock, grafting the branch of the delicious kiwi "Jin Kui" variety on the Actinidia callosa rootstock, grafting the kiwi variety branch on the branch of the delicious kiwi "Jin Kui" variety, and planting the seedling in an orchard after grafting.

[0025] In the embodiment, the kiwi variety branch is subjected to low-temperature treatment before grafting, so as to break dormancy and improve the growth after grafting; the variety branch is subjected to hormone treatment, such as application of auxin or cytokinin, so as to promote the combination with the seedling rootstock of the delicious kiwi.

[0026] The above-mentioned embodiment is only a preferred embodiment of the present application, and cannot be used to limit the protection scope of the present application, and any non-essential change and replacement made by the person skilled in the art on the basis of the present application shall belong to the protection scope of the present application.

Claims

1. A method for improving the grafting survival rate of kiwifruit rootstock, characterized in that, A bridging graft will be performed on the calyx kiwifruit rootstock and the delicious kiwifruit seedling rootstock to achieve dual-root system cultivation. After bridging, kiwifruit cultivar branches will be grafted onto the delicious kiwifruit seedling rootstock. After grafting, the seedlings will be planted in the orchard.

2. The method for improving the grafting survival rate of kiwifruit rootstock as described in claim 1, characterized in that, Before grafting, the branches of the kiwifruit variety are subjected to low-temperature treatment to break dormancy and improve their growth vigor after grafting; the branches of the variety are treated with hormones, such as auxin or cytokinin, to promote their integration with the rootstock of the delicious kiwifruit seedling.

3. The method for improving the grafting survival rate of kiwifruit rootstock as described in claim 1, characterized in that, In the early stages after grafting, the seedlings should be properly shaded to reduce water evaporation and improve the survival rate. In the later stages after grafting, the seedlings should be placed in a specific greenhouse environment with the temperature controlled at 20-25°C, humidity at 70-80%, and light intensity at 5000-8000 lux to promote their growth and recovery.

4. The method for improving the grafting survival rate of kiwifruit rootstock as described in claim 1, characterized in that, Select the delicious kiwifruit variety "Jin Kui" as the rootstock, and graft it onto the 'Double-calyx' kiwifruit rootstock. Graft branches of the delicious kiwifruit variety "Jin Kui" onto the 'Double-calyx' kiwifruit rootstock, and graft branches of the kiwifruit variety onto branches of the delicious kiwifruit variety "Jin Kui".