Abstract:
A pumice-based medium excellent in properties required of media for cultivation in facilities. The medium for cultivation is characterized by being constituted of pumice particles having a coefficient of saturation water permeability of 0.3 to 0.8 cm/sec and a coefficient of air permeability of 15 to 40 cm/sec as measured on dry and wet samples. Also provided as another embodiment is a medium for cultivation which comprises the medium constituted of pumice particles having these properties and charcoal incorporated therein.
Abstract:
The invention aims at providing a method and an apparatus for measuring the moisture content of the soil in order to enable pF value based control of irrigation in cultivation on the soil, as well as a method and an apparatus which use the first-mentioned method and apparatus to enable pF value based control of irrigation. To attain these objects, the invention provides a method for measuring the pF value (soil moisture tension) of the soil, comprising the steps of (a) preliminarily determining the correlation between pF value and volumetric water content of the soil to be measured, (b) measuring the volumetric water content of the soil, and (c) converting the value of the volumetric soil water content of the soil measured in the above step (b) to the corresponding pF value on the basis of the correlation between pF value and volumetric water content predetermined in the above step (a). The invention also provides a method and an apparatus for controlling the irrigation of the soil based on the measurement of the pF value by said method.
Abstract:
A desalination apparatus capable of obtaining fresh water stably at low cost by utilizing low-temperature waste, wherein the desalination apparatus including a heat exchanger 92 cooperating with an evaporation can 60 so as to subject a low-temperature waste heat 11 and raw water 62 in the evaporation can 60 to heat exchange and generate water vapor 63 in the evaporation can 60; a condenser 98 cooperating with a raw water tank 72 so as to receive the water vapor 63 from the evaporation can 60, cool the water vapor 63 by subjecting the water vapor 63 and raw water 71 in the raw water tank 72 to heat exchange and obtain distilled water 76; a distilled water tank for storing the distilled water 76; vacuum means for evacuating the evaporation can 60 and depressurizing the inside thereof so as to promote generation of water vapor 63 in the evaporation can 60; and raw water supply means for supplying raw water to the evaporation can.
Abstract:
A desalination apparatus capable of obtaining fresh water stably at low cost by utilizing low-temperature waste, wherein the desalination apparatus including a heat exchanger 92 cooperating with an evaporation can 60 so as to subject a low-temperature waste heat 11 and raw water 62 in the evaporation can 60 to heat exchange and generate water vapor 63 in the evaporation can 60; a condenser 98 cooperating with a raw water tank 72 so as to receive the water vapor 63 from the evaporation can 60, cool the water vapor 63 by subjecting the water vapor 63 and raw water 71 in the raw water tank 72 to heat exchange and obtain distilled water 76; a distilled water tank for storing the distilled water 76; vacuum means for evacuating the evaporation can 60 and depressurizing the inside thereof so as to promote generation of water vapor 63 in the evaporation can 60; and raw water supply means for supplying raw water to the evaporation can.
Abstract:
A desalination apparatus capable of obtaining fresh water stably at low cost by utilizing low-temperature waste, wherein the desalination apparatus including a heat exchanger 92 cooperating with an evaporation can 60 so as to subject a low-temperature waste heat 11 and raw water 62 in the evaporation can 60 to heat exchange and generate water vapor 63 in the evaporation can 60; a condenser 98 cooperating with a raw water tank 72 so as to receive the water vapor 63 from the evaporation can 60, cool the water vapor 63 by subjecting the water vapor 63 and raw water 71 in the raw water tank 72 to heat exchange and obtain distilled water 76; a distilled water tank for storing the distilled water 76; vacuum means for evacuating the evaporation can 60 and depressurizing the inside thereof so as to promote generation of water vapor 63 in the evaporation can 60; and raw water supply means for supplying raw water to the evaporation can.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing vegetables with effect of health maintenance and prophylaxis of diseases of consumers through reinforcing and inducing health functionality inherited from vegetables. SOLUTION: A highly functional cultivation method for leaf vegetable agricultural products increases the diabetes suppressing function of spinach and the expression promoting function of erythropoietin production gene promoting blood formation function by cultivating spinach through watering liquid fertilizer with high calcium concentration and/or water with high calcium concentration, or suppressing water content in a medium during cultivation and adding water stress to spinach, preferably through bringing pH value of the medium to >2.0, or using liquid fertilizer subjected to magnetic treatment for spinach cultivation. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an automatic watering controller which does not use a tensiometer method but is based on a pF value of soil measured using a method for examining an water holding property of soil. SOLUTION: This automatic watering controller for a vegetation system uses granular pumice as a medium for rooftop and ground vegetation. The system is equipped with a culture solution trickle apparatus of trickle flow type and a means for controlling an amount of water to be sent to the trickle apparatus based on the pF value of the granular pumice outputted from an arithmetic unit on the basis of the outputted result of volume water content of the granular pumice medium and an automatic watering control is carried out. A sensor for electrically and continuously detecting the water content of the granular pumice medium is preferably a sensor by an ADR method, TDR method or FDR method.
Abstract:
PROBLEM TO BE SOLVED: To provide the vessel suitable for mass cultivation, unnecessary of automatic irrigation machine, capable of uniform application of fertilizers and irrigation without consuming time, generating no root rot, and capable of being easily set up. SOLUTION: This plant cultivation vessel is in the form of a box with opened upper surface, and characterized by setting up at the bottom a liquid-staying part in the form of plural recesses which are not isolated from the upper structure thereof and also having an opened drain mechanism in the vicinity of the top of the recesses; wherein the liquid-staying part may be formed at the bottom wall of the box or formed by an insole member installed in the box, the drain mechanism is set at the sidewall of the box and/or set penetrating through the bottom wall, and it is preferable that a granular inorganic medium (e.g. pumice) is held in the box.
Abstract:
PROBLEM TO BE SOLVED: To provide a cultivation method capable of enabling the cultivation by close planting of perennial field crops requiring the cultivation of a parent plant for a long period regardless of soil characteristics of a region and without diffusing injury by continuous cropping, and disease. SOLUTION: This method for cultivating perennial field crops is characterized in that the perennial field crops are separately transplanted in a divided vessel filled with coarse soil comprising volcanic pumice and having 1-5.6 mm particle diameter and porous surface. A culturing liquid is preferably fed by a drip gravity-feed irrigation method, and the perennial field crop is preferably pineapple. Preferably, the pH of the culturing liquid is regulated so as to be 4-8, and the divided vessel is arranged in a greenhouse. The divided vessel preferably has about 24 cm diameter and about 30 cm depth, is filled with about 7 liter pumice medium, and has a drainage hole in the side wall at the vicinity of the bottom.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for cultivating vegetables having health function through regulation of cultivation environment, by which the content of functional components such as vitamin C and/or tocopherol in vegetables can be increased and regulated; and to provide a cultivation establishment for performing the method. SOLUTION: The method for cultivating vegetables having health function comprises covering vegetables with a light-transmitting panel or sheet, and cultivating the vegetables in a culture bed. In the method, liquid fertilizer having a concentration of 0.25-0.75 or 1.5-2.0 times that of a standard culture solution determined in Horticultural Research Station is applied to the vegetables when cultivating the vegetables so as to increase the content of functional components contained in leaf vegetables. In the method, ultraviolet irradiation to the vegetables results in increasing the content of functional components in the vegetables. COPYRIGHT: (C)2005,JPO&NCIPI