A method for rapid seedling cultivation of rich sweet persimmon middle stock

Abstract

The invention discloses a method for rapidly raising seedlings of rich sweet persimmon on an intermediate stock, which comprises the following steps: cultivating large seedlings of Junqian persimmon on the base stock, sowing seeds in the first ten days of January after the germination treatment of the seeds, covering the ridges with plastic film and building a small arch shed with plastic film; The thickness of the seedlings reached 0.5cm. On June 20 of that year, the middle stock Eperimi No. 1 was grafted, and the stock was cut for the second time after grafting; The present invention uses Eshi No. 1 as an intermediate stock to breed sweet-rich persimmons, which effectively overcomes the problem of incompatibility between sweet-rich persimmons and the rootstock Junqianzi, and the time for seedling cultivation on the middle stock is shortened by one year compared with conventional methods, reducing production costs.

Description

technical field [0001] The invention relates to the field of fruit tree nursery stock breeding, in particular to the technique of raising seedlings of the Japanese sweet persimmon variety rich sweet persimmon using an intermediate stock, short cycle, low cost and high nursery rate. Background technique [0002] China is one of the main countries of origin of persimmon, and its output and area both rank first in the world. It is rich in germplasm resources. There are 951 original astringent persimmon varieties, and there is only one original sweet persimmon, that is, Luotian sweet persimmon in Hubei Province. [0003] Luotian sweet persimmon is the oldest sweet persimmon germplasm resource in the world, and it is also the only sweet persimmon germplasm native to my country so far. Its central production area is Luotian County and Macheng City, Hubei Province, so it is named "Luotian "Sweet persimmon", in 2008, after review by the General Administration of Quality Supervision, ...

AI Technical Summary

Problems solved by technology

[0006] However, the rich sweet persimmon and the rootstock Junqianzi widely used in persimmon producing areas in my country are not suitable for grafting, which shows that the survival rate of grafting is low, the degree of joint healing is low, and the joints appear to swell, crack, or even break, especially for this kind of grafted seedlings. The planting survival rate is low, the tree vigor is extremely weak, and the plants are easy to die (Wang Yuanyu et al. 1996. Study on the grafting affinity of sweet persimmon rootstock and ear combination. Acta Horticultural Science)

This is also an important reason why Japanese sweet persimmon varieties have been introduced to China since the early 20th century and have become an important reason for the formation of the industry. As a result, the quality of sweet persimmon products in my country is not good and the export competitiveness is not strong.

[0007] At the same time, in the production of fruit tree seedlings in our country, the seedlings are grafted and raised with intermediate stock. The seedlings are composed of three parts: the base stock, the middle stock and the scion variety. In the second year, the middle stock seedlings are cultivated, and the varieties are grafted in autumn; in the third year, the seedlings are cultivated and released from the nursery, resulting in a longer seedling cycle and higher management costs.

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