Citrus seedling breeding method

Abstract

The invention discloses a citrus seedling breeding method with the advantages of convenient transplanting, high transplanting survival rate, no rejuvenation period after transplanting, and greatly shortened citrus growth period. The method comprises the steps of a seeding-raising step, a grafting step, a field management step, and a seedling out-planting step. The seeding-raising step comprises rootstock seedling cultivation and scion-picking female parent tree cultivation. The rootstock seedling cultivation step comprises seed treatment, sowing, and transplanting cultivation. The sowing step comprises nutrient soil preparation, seedbed sowing, and seedbed management. In the transplanting cultivation step, rootstock seedlings with heights higher than 15cm are directly transplanted into seedling-raising containers with nutrient soil. In the scion-picking female parent tree cultivation step, detoxified Yongchun mandarin seedlings are field-planted in a mesh room, and scions are cut in the second year after field planting. In the grafting step, a scion is grafted on a transplanted rootstock seedling with trunk height higher than 35cm and with a trunk diameter of 0.6-0.8cm at a place with a distance of 10cm from the soil surface. The grafting place is on the rootstock seedling with more than 10cm from a root collar. Grafting tools and personnel should be disinfected when grafting is carried out.

Description

technical field [0001] The invention relates to a plant cultivation method, in particular to a method for breeding citrus seedlings. Background technique [0002] Citrus, evergreen small trees or shrubs, about 2m high, branchlets are thin, glabrous, usually prickly, leaves ovate-lanceolate, 4-8cm long, yellow-white flowers, solitary or clustered leaf axils, oblate fruit , 5-7cm in diameter, orange-yellow or orange-red, thin and easy to peel off, blooms in spring, ripens from October to December, prefers warm and humid climate, slightly stronger cold resistance than pomelo, lime, and sweet orange. Citrus belongs to the genus Citrus of Rutaceae, which is a tropical and subtropical evergreen fruit tree (except Hovenia trifoliata). There are 3 genera used for economic cultivation: Hovenia citrifolia, Citrus and Kumquat. The citrus cultivated in my country and other countries in the world is mainly of the genus Citrus. [0003] The existing methods of breeding citrus seedlings ...

AI Technical Summary

Problems solved by technology

[0003] The existing methods of breeding citrus seedlings include seedlings, layering, cutting and grafting, etc. At present, the grafting method is the best and most common. The grafted seedlings of citrus are composed of scions and stock seedlings. The grafted seedlings of citrus are all Bare-rooted seedlings, the roots of this kind of bare-rooted seedlings are in direct contact with the soil when they are out of the nursery, and the roots are likely to be damaged during excavation, and only a small amount of original soil can be brought with them when they are unearthed, so that the transplantation of bare-rooted seedlings can only be carried out in spring. It cannot be transplanted all the year round, and it brings inconvenience to the transplanting operation; at the same time, when transplanting, the roots need to be stepped on after covering the roots with soil, which undoubtedly damages the roots again, and the seedlings do not grow on the soil of the original place of growth after transplanting, making bare Root seedlings have a long slow seedling period after transplantation, and the survival rate is relatively low