PROBLEM TO BE SOLVED: To solve a problem wherein a process for washing seeds and bulbs of vegetables, flowers, etc. with water or chemicals such as an aqueous solution of sodium hypochlorite before sowed in a seedbed is frequently provided because there is a risk of fungi, bacteria, etc. sticking to the seeds and bulbs, and this process can prevent plants from being contaminated with fungi, bacteria, etc, but time before the start of cultivation and cost for water service, chemicals, etc. are required, and although there is a system for suppressing fungi etc. by irradiating with an ultraviolet lamp or the like in the growth process of plants, there is a possibility of ultraviolet rays having adverse effect on human skin and eyes, therefore needing to pay the closest attention to the use. ! SOLUTION: A plant raising apparatus generates positive ions and negative ions by an ion generator, and irradiates a seedbed installed in the apparatus with the positive ions and negative ions to suppress bacteria and fungi sticking to seeds and bulbs of plants without using ultraviolet light and chemicals harmful to human bodies. ! COPYRIGHT: (C)2014,JPO&INPIT
