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Patent Searching and Data


Title:
CULTIVATING UNIT USING NUTRIENT FLUID AND NUTRIENT FLUID PREPARED SOLUTION FOR IT
Document Type and Number:
Japanese Patent JPH07227163
Kind Code:
A
Abstract:

PURPOSE: To grow plant effectively and avoid waste of a nutrient fluid, by controlling various ion concentrations, an electric conductivity and a pH value.

CONSTITUTION: This unit is equipped with means of measuring an electric conductivity, a pH value and various ion concentrations in a nutrient fluid for plant cultivation, an electric conductivity controlling means supplying a stock solution for the nutrient or a diluting water to meet the electric conductivity to a stated value in case the electric conductivity is out of the stated range, a pH controlling means supplying a suitable one among plural alkaline solutions and plural acid solutions to meet the pH value to a stated value in case the pH value is out of the stated range, and an ion concentration controlling means supplying a solution containing mainly a particular ion to meet the ion concentration in a stated range in case the ion concentration is lower than the stated range and also supplying other solutions than the solution containing mainly the particular ion and the diluting water to meet the ion concentration in the stated concentration range in case the ion concentration is higher than the stated ion concentration range.


Inventors:
KIKUCHI HIROSHI
Application Number:
JP1994000024231
Publication Date:
August 29, 1995
Filing Date:
February 22, 1994
Export Citation:
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Assignee:
TOSHIBA CORP
International Classes:
C05G1/00; A01G31/00; (IPC1-7): A01G31/00; C05G1/00
Attorney, Agent or Firm:
鈴江 武彦