A kind of device and method for growing tobacco seedlings in straight bottomless palace format

Abstract

A device and method for raising tobacco seedlings in a straight-tube bottomless palace format. The tobacco seedling-raising device includes a hollow palace-style straight cylinder. The single straight cylinder is composed of rectangular surfaces, which are not curved surfaces; point-shaped or annular protrusions are provided on 1 / 3 of the inner wall of the straight cylinder. , a seedling raising method comprising leveling the seedling raising shed, filling the substrate, sowing seeds, and irrigating with water and fertilizer. The invention has the advantages of improving emergence efficiency and reducing stiff seedlings.

Description

technical field [0001] The invention relates to a tobacco seedling raising device and a seedling raising method, in particular to a tobacco seedling raising device and a seedling raising method which can improve the rate of strong seedlings and reduce stiff seedlings. Background technique [0002] In recent years, tobacco planting has implemented centralized seedling raising methods, generally adopting floating seedling raising and wet seedling raising. Conventional floating seedling raising and wet seedling raising mainly use the siphon effect of the substrate, and the seedling raising pool (seeding tray) is used as a nutrient storage area to absorb nutrients from bottom to top. Nutrient solution and water supply the root system development of tobacco plants; some areas innovatively implement the moist seedling cultivation of tobacco leaves away from water, improve the bottom-up nutrient supply mode, and use top-down high-frequency nutrient supply to promote the development ...

AI Technical Summary

Problems solved by technology

[0004] The second is that the root system volume space is small, and the root system development is limited

Due to the limited space, the development of the root system is limited, especially in the later stage, the root tip is in an endogenous state, and the root tip is facing into the matrix instead of spreading outward. Not obvious, the root system presents a spiral shape, fibrous roots and secondary lateral roots do not stretch vigorously, and the seedlings grow slowly

[0005] The third is that the contact surface between the root system and the soil is small when transplanting, which is not conducive to early growth and rapid development.

[0006] Fourth, the relative stability of seedling temperature is not high enough

Although greenhouse seedlings are implemented, floating seedlings and wet seedling trays are greatly affected by water temperature, and there are still low temperature effects in the early stage of seedling cultivation. The temperature rise rate is slow under low temperature conditions, and the low temperature affects the emergence time from sowing to before emergence. Trays (and tobacco leaf moist seedling cultivation) are independent of each other due to the independent root system holes, which are greatly affected by the ambient air temperature in the greenhouse.

[0007] Fifth, the efficiency of raising seedlings per unit area is not high enough

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