Improved cold frame used for winter and spring vegetable seedling growing in Huang-Huai-Hai region

Abstract

The invention discloses an improved cold frame used for winter and spring vegetable seedling growing in Huang-Huai-Hai regions. The improved cold frame is provided with a double-layer shed which is provided with an inner shed and an outer shed. The shed is internally provided with a windbreak wall, an operation trench, and a cold frame. Two ends of the cold frame are provided with bed frames. Since two layers of shed films are added, and films on a seedling growing bed are covered by wheat straws, three layers of films are covered to keep warm. The plurality of layers of covering keep warm and are transparent. The operation trench can store cold frame covering objects and the shed films of the inner shed, and is beneficial for farm operation in the shed. The film of the inner shed and the wheat straw coverings are removed in daytime, and are covered at night, effectively preventing shading of the seedling beds in daytime, so as to satisfy both requirements of warm keeping and light transmitting. A problem that conventional multilayer covering seedling growing is insufficient in illumination is effectively overcome. The windbreak wall is arranged on the south side of the seedling bed surface, and is beneficial for keeping warm and preventing cross ventilation. Covering positions of wheat straws and other external thermal insulation materials are the cold frame shed surfaces but not the surface of the outer shed, and workload of daily management is reduced, and defects that thermal insulation effect is influenced by moisture absorption of the external covering materials in rainy and snowy weather are eliminated.

Description

technical field [0001] The invention relates to an improved sunbed for raising seedlings of winter and spring vegetables in the Huanghuaihai region, and belongs to the technical field of agricultural planting. Background technique [0002] Vegetable seedlings generally adopt protective facilities such as greenhouses, plastic sheds or sunbeds, and artificially regulate and change local environmental conditions to create an external environmental condition that is similar or close to the normal germination of vegetables, thereby promoting vegetable seeds to germinate in abnormal periods. , germination, growth process. [0003] Winter-spring seedling raising refers to overwintering seedling raising and early spring seedling raising in order to cooperate with spring early maturation promotion cultivation. This seedling cultivation period is in December and January and February, when the temperature is the lowest in a year, which is the most unfavorable period for vegetable grow...

AI Technical Summary

Problems solved by technology

However, raising seedlings by increasing temperature is complicated to operate, high in cost, and has high technical requirements for seedling growers.

[0005] The winter and spring seedling cultivation in the Huanghuaihai region mainly adopts greenhouses or plastic sheds to overcome the adverse effects of low temperature on seedling cultivation, but there are still the following problems: 1. The cost of the facilities required for greenhouse temperature-raising Greenhouse costs 60,000 to 70,000 yuan

2. The cost of raising seedlings by warming up in the greenhouse in winter is relatively high. Generally, the cost of raising seedlings by warming up in winter in a greenhouse is between 0.25 and 0.35 yuan per plant.

3. After the greenhouse is built, it cannot be moved. Long-term use will easily cause the accumulation of pathogenic bacteria, aggravate the disease and secondary salinization of the soil