An earthworm breeding device for middle school biological experiments

Abstract

The invention discloses an earthworm breeding device for a biological experiment in middle school. A plurality of soil sieving modules are fixed on a bottom plate; each soil sieving module comprises a soil sieving drawer with an opening in the top; a breeding module is arranged at the upper part of each soil sieving drawer in a sliding manner and can slide back and forth relative to the soil sieving drawer; each breeding module comprises a breeding drawer; a seal cover is arranged at the top of each breeding drawer; an earthworm inlet is arranged in each seal cover; a soil leaking opening is formed in the center of the bottom of each breeding drawer; a hollow cavity is formed in the lower part, corresponding to the soil leaking opening, of each breeding drawer; a sealing plate for sealing the soil leaking opening is arranged in each hollow cavity in a drawing manner; a filter net plate is detachably and fixedly arranged at the upper part of each soil leaking opening; and loose soil covers each breeding drawer. Earthworms after an experiment are independently stored, so that the condition that the earthworms which are just subjected to stimulating experiment are used for an experiment again is ensured; the accuracy of the experiment result is ensured; the stimulation damage to the earthworms is reduced; and the bred earthworms can be separated from a soil layer to be used again through soil sieving and mutual dragging of agglomerated earthworms in the using process is prevented.

Description

technical field [0001] The invention relates to the technical field of supporting equipment for biological experiments, in particular to an earthworm breeding device for middle school biological experiments. Background technique [0002] There are experiments on earthworm observation in middle school biology courses, which require live earthworms that are relatively sensitive to stimuli. When conducting experiments, earthworms need to be placed on rough paper for a series of observations and experiments. During the experiment, earthworms need to be touched, stimulated and dripped. However, the number of earthworms used in the experiment is limited, and a large number of students need to repeat the experiment frequently. After the experiment is completed, the earthworms will be kept in a bucket, and the next time the laboratory is carried out, the earthworms will be taken out from the bucket for another experiment. There are the following problems in such an experimental pro...

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Problems solved by technology

There are the following problems in such an experimental process: First, the earthworms that have just passed the stimulation experiment may be taken out again for experiments, so that the response of the earthworms to the stimulation will be weakened, resulting in inaccurate experimental results; second, the earthworms that have just passed the stimulation experiment may If the earthworms are repeatedly taken out for experiments, overstimulation may occur and the earthworms will die, which will make the experimental materials that are already lacking even more scarce; the third is that the earthworms in a group are placed in a bucket with poor air permeability. , and long-term storage is likely to cause the death of earthworms; fourth, the clusters of earthworms are placed together, and when taken, it is easy to cause the earthworms to pull each other and cause damage or even persecution to the earthworms

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