Method of growing seedlings of virus-free sweet potato by three-layer covering

Abstract

The invention discloses a method of growing seedlings of virus-free sweet potato by three-layer covering. The method refers to growing seedlings of virus-free sweet potato under three-layer covering of mulching film in combination with an arched shed and a solar greenhouse in middle and south areas of Hebei province. The acquired method starts with the manufacture of seedbeds in the solar greenhouse and covering of arched shed film and mulching film in conjunction with the integration of factors such as the management of virus-free sweet potato arrangement and bed-mounting mode, intra-shed temperature, humidity and other important conditions, so that seedling stage of sweet potato in middle and south areas of Hebei Province is one month and a half earlier, and the requirement of sweet potato for early planting in middle to late March is met. In addition, the method of the invention experiences small influence from external weather, has large seedling growth area and maintains intra-shed environment more stable, it can be ensured that seedling growth and emergence stages of sweet potato in batch are significantly brought forward, the obtained seedlings of sweet potato additionally have the planting advantage that disease and pest damage rarely occurs during planting, it is possible for the sweet potato seedlings to emerge twice a year through the collection mode of high-cut seedlings, and the method has positive popularization significance and significant economic value.

Description

technical field [0001] The invention relates to the technical field of sweet potato seedling cultivation, in particular to a three-film-covered seedling cultivation method of virus-free sweet potato. Background technique [0002] Sweet potato, also known as sweet potato, sweet potato, etc., is the fourth largest crop in my country. It is delicious, sweet and nutritious. It contains a lot of sugar, protein, fat, vitamins and minerals. It can be used as food, and the nutrients contained in it can increase the body's resistance. Enhance the elasticity of blood vessel walls and the health of bones and teeth, and contain a lot of carbohydrates, calcium and carotene, which are not as good as ordinary rice and noodles. It is a high-yielding, nutritious miscellaneous grain. It is an important economic, energy, feed and health crop that has been widely valued in recent years because it has the effects of nourishing blood and nourishing qi, laxative, improving immune function, anti-agin...

AI Technical Summary

Problems solved by technology

The emergence of traditional sweet potato seedlings is late, which cannot meet the needs of current production, and there are problems such as serious diseases and low land utilization, which directly affect the progress of high-yield cultivation and the promotion of new sweet potato production models