Layering premature seedling culture method for sweet potato vines

Abstract

The invention relates to the technical field of seedling culture of sweet potatoes of crops, in particular to a layering premature seedling culture method for sweet potato vines. The layering premature seedling culture method for sweet potato vines comprises the following steps: step one, preparation of a seedbed; step two, preparation of vines and layering; step there, preparation of a covering material; and step four, management of seedlings. For solving the shortcomings that in a storage process of sweet potato seeds, loss of the potato seeds is caused and seedlings emerge late during seedsowing and seedling culturing of the potato seeds due to diseases and the line in a storage period, the method for breeding seedlings in a layering mode in a protected area in the winter through wastesweet potato vines during harvesting of the sweet potatoes is provided, thus, wastes can be utilized reasonably, the trouble of storage of potato seeds of farmers is omitted, meanwhile, by the method, seedling culture can be earlier than potato seed culture by 37 days, the method lays a foundation for two-season cultivation in a year, and thus, the yield and the production value of unit area arealso increased.

Description

【Technical field】 [0001] The invention relates to the technical field of crop sweet potato seedling raising, in particular to a method for promoting early seedling raising of sweet potato vine layering. 【Background technique】 [0002] Sweet potato is an annual herb plant, vines; commonly known as sweet potato, sweet potato, etc., it is rich in protein, starch, pectin, cellulose, amino acids, vitamins and various minerals, and has the reputation of "longevity food". The reproduction of sweet potato mainly depends on asexual Breeding. In the middle and lower reaches of the Yangtze River, farmers mainly rely on storing the seed potatoes of the year. In mid-February of the following year, they planted and raised seedlings in greenhouses with plastic film and small sheds. After the seed potatoes germinated in mid-to-late March, the vines grew to 15- At 20 cm, cut the vines and carry out the first cutting seedling cultivation, and cut the vines in the seedbed by the end of May, an...

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Problems solved by technology

[0004] Problem 1: Because the first method of raising seedlings uses vertical cuttings of branches and double-layer film, the above-ground branches are easily frostbitten or frozen to death due to low temperature. At the same time, it also puts forward higher requirements for daily field management and requires stricter heat preservation. Ventilation and light transmission in sunny days

[0005] Problem 2: With the second seedling raising method, farmers need to store a large amount of seed potatoes for use in the next year, but sweet potato soft rot and black spot often cause a large number of seed potatoes to rot during the long winter storage process. The loss rate is as high as 30-60%, causing a large amount of seed potato waste, and also affecting the production of sweet potatoes in the following year. Problem 3: Some leaf sweet potato varieties cultivated in the middle and lower reaches of the Yangtze River have no tuber formation, resulting in No seed potatoes to sow

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