Method for cultivating sweet potato seedlings through hotbed

Abstract

The invention discloses a method for cultivating sweet potato seedlings through a hotbed. According to the method, the technology of converting light energy and electric energy to heat energy is adopted, the temperature control technology, a temperature control device and a communicated grid type thermal circulation system are integrally applied to sweet potato seedling cultivation, the requirement of sweet potato seedling cultivation at different stages for the temperature is effectively met, and the capacity for adapting to the low-temperature and less-sunshine weather is improved; compared with traditional heating methods such as a flame path heating method and a biological fuel heating method, the method is quick in temperature rise, reliable in temperature rise, uniform in overall hotbed temperature, small in temperature difference, capable of adjusting the temperature in time at different seedling cultivation stages, easy and convenient to operate, and capable of saving energy and labor and reducing cost; the thermal circulating path that during seedling cultivation conducted through a traditional plastic greenhouse, heat can only penetrates from the surface of the hotbed to the potato layer step by step is changed, the upward sunny side and the downward dark side of the hotbed where potatoes are planted are heated at the same time through hot air circulating in the surface of the hotbed and communicated grid type air guide grooves, the air flow and the air temperature around the dark side of the hotbed where the potatoes are planted are changed, differentiation of adventitious buds on the dark side is promoted, and output of the seedlings is improved.

Description

technical field [0001] The invention relates to a method for growing sweet potato seedlings, in particular to a method for cultivating sweet potato seedlings in a seedling raising hotbed. Background technique [0002] Sweet potato seedling cultivation is the primary link in sweet potato production. Only when seedlings are raised at the right time can we ensure timely and early planting and prolong the growth time of sweet potatoes as much as possible; avoid "spring potato planting in summer" and "summer potato planting in autumn" to lay the foundation for high yield. my country's sweet potato production areas spread across the north and south, with different natural conditions, seedling raising methods, and seedbed styles, which can be basically divided into four categories: 1. Open-field type utilizes local natural conditions and does not require special equipment and management. Such as ground furrows (yang furrows), small high ridges, etc. 2. Heating type According to l...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of using coal or wood to heat in the traditional heating-type seedling cultivation, which is time-consuming and labor-intensive, the temperature difference of the bed surface is large, and the temperature is controlled by the size of the fire. , the control is inaccurate; heat-brewing seedlings mainly use the heat generated by plant stalks, fresh livestock manure, fallen leaves, etc. Although it saves energy and is practical and effective, it has poor adaptability to adverse environments (rainy weather with little sunshine), artificial temperature cannot be accurately controlled, hot air can only penetrate downward from the surface soil layer of the bed, the temperature of the seed potato layer rises slowly, and the potato layer, To solve the problems of large temperature difference between the lower two sides, a method for cultivating sweet potato seedlings with a seedling breeding hotbed is provided. The present invention adopts the technology of converting light energy and electric energy into heat energy, and integrates temperature control technology, equipment and intercommunicating grid heat circulation system into sweet potato In seedling cultivation, it effectively solves the temperature requirements of different stages of sweet potato seedling cultivation, and improves the adaptability to low-temperature and low-light weather; compared with traditional heating methods such as the fire path heating method and the brewing heating method, the temperature rises faster, the temperature rises reliably, and the temperature of the whole bed Even, the temperature difference is small, and the temperature can be adjusted in time at different seedling stages. The surface and the hot air circulating in the intercommunicating grid-style air guide groove heat the positive side of the seed potato upwards and the shady side downwards at the same time, changing the air flow and temperature around the shady side of the seed potato, promoting the differentiation of adventitious buds on the shady side, and improving emergence quantity

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