Method for quickly raising seedlings of Fuyou sweet persimmon via interstocks

Abstract

The invention discloses a method for quickly raising seedlings of Fuyou sweet persimmon via interstocks. The method includes the steps of cultivating large seedlings of Diospyros lotus for rootstocks, performing seeding in early January after seeds are subjected to sprouting acceleration, mulching field ridges with mulch film, and setting up plastic film covered small arches; when the thickness of rootstock seedlings reaches 0.5 cm, performing chip budding with interstocks of E Shi 1 on 20th, June, and performing secondary stock pruning after grafting; in next year, grafting scion buds of Fuyou sweet persimmon to positions 20 cm above grafting cuts of the interstocks. By the use of the E Shi 1 to provide the interstocks to cultivate Fuyou sweet persimmon, the problem that Fuyou sweet persimmon and rootstock Diospyros lotus are grafting incompatible is effectively solved; the time of interstock-based seedling raising is 1 year earlier than that of the conventional method, and production cost is lowered.

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 Spike 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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