Method for controlling water of seedbed of cured tobacco seedlings by floating cultivation

Abstract

The invention discloses a method for controlling water of a seedbed of cured tobacco seedlings by floating cultivation, relating to soilless and waterless seedlings culture of crops. The method comprises two steps of: reconstruction of a nutrition pool: removing an earth stripe at one end of a conversional nutrition pool, digging a puddle for storing nutrient fluid, sequentially arranging two columns of bamboo splints in the nutrition pool, and placing a floating plate overhead after the nutrient fluid is discharged so as to form an air layer between the bottom of the floating plate and the liquid level; and water control of cured tobacco seedlings by dry-wet alternation and discontinuous water supply: moving the nutrient fluid in due time according to the water requirement pattern of thecured tobacco seedlings so as to ensure water for the growth of the cured tobacco seedlings. The method has the advantages that: (1) the water supply time and the supplying water are based on the water requirement pattern of the cured tobacco seedlings in growing so as to be beneficial to promoting the growth of the seedlings and improving the quality of the cured tobacco seedlings; (2) the nutrient fluid is reused, the utilization ratio of water and nutrients is greatly improved, and the collected nutrients can also be used for other plants so as to reduce pollution to the environment; and (3) the plate airing process caused by overmuch water in a floating cultivation substrate during latter hardening off is reduced, the labor intensity is lowered and the manpower is saved.

Description

technical field [0001] The invention relates to the fields of crop cultivation and seedling cultivation without soil and water, in particular to a technology for controlling moisture in a flue-cured tobacco floating seedling cultivation bed. technical background [0002] Flue-cured tobacco floating seedlings have been very popular in major tobacco areas in my country, completely replacing the two-stage flue-cured tobacco nutrition block (bag) fake planting seedlings that were popularized in the early stage. It plays an important role in ensuring the intensive cultivation of flue-cured tobacco seedlings and the commercialization of flue-cured tobacco seedlings. The rational distribution and management of varieties are also of great significance to the planned planting of flue-cured tobacco nationwide. However, the growth of flue-cured tobacco floating seedlings is slow in the early stage, and the rapid growth is mainly concentrated after mid-March. If it is controlled by fact...

AI Technical Summary

Problems solved by technology

In order to solve this problem, tobacco farmers often lift the seedling tray out of the water, and reduce the excess water in the substrate in the later stage by drying the tray (also known as the drying tray). Alt...

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