JPH08172930A - Raising seedling unit - Google Patents

Abstract

PURPOSE: To provide an inexpensive raising seedling unit of simple structure capable of conducting more proper watering and rhizosphere heating. CONSTITUTION: This raising seedling unit has such a scheme that a water vapor- producing chamber 2 with the upper surface served as the air-permeable supporting surface bearing a raising seedling box support member and the peripheral sides closed is installed inside a culture house; inside the chamber, air leak ducts 3 each made of air-permeable sheet having many fine perforations nearly uniformly with the front end virtually closed are supported; an air fan located outside the chamber 2 and to forcedly feed hot air into each of the ducts 3 is connected to the other end of each of the ducts 3; water spray nozzles are set up around each of the ducts 3; and a raising seedling box 16 are provided with aerating holes at the bottom and filled with raising seedling culture soil 21 free to pass water vapor therethrough.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to raising seedlings of various plants, especially cucumbers, in greenhouses such as greenhouses and greenhouses.
The present invention relates to a seedling raising device used for grafting seedlings of fruits and vegetables such as eggplant and makuwauri.

[0002]

2. Description of the Related Art For example, in grafting seedlings of fruit and vegetables, in order to promote the survival of seedlings obtained by joining a rootstock seedling with a scion seedling, and achieving a cultivated seedling, generally, an appropriate amount of water supply and rhizosphere are required. It is necessary to heat up. Therefore, conventionally, a sprinkling nozzle is arranged in the upper part of the greenhouse, a heating wire or a hot water pipe is buried in the soil, and the seedlings are watered from the sprinkling nozzle and the cultivation soil is heated by the heating wire or the like. Is widely practiced.

However, regarding the irrigation means in the above-mentioned conventional apparatus, even if a large number of sprinkler nozzles are arranged in a uniform distribution, the circular sprinkler areas from the respective sprinkler nozzles partially overlap each other, or the non-sprinkler areas. Causes uneven irrigation,
Moreover, when an unsprayed area occurs, water tends to be excessively sprinkled from all nozzles, which often causes rooting. Looking at the method for heating the soil, there is a problem that the buried heating wires and hot water pipes obstruct the work efficiency during the work such as cultivating the soil and replacing the soil, and the overall equipment cost is low. There was a big drawback.

[0004]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention The present invention provides more appropriate water supply and heating of the rhizosphere based on the finding that a smaller amount of water supply promotes the growth of roots of seedlings as a result of experiments. It is an object to provide an inexpensive seedling raising device with a simple configuration that can be performed.

[0005]

In order to solve the above-mentioned problems, the present invention comprises a cultivation building in which an upper surface is formed as a freely ventilated support surface having a nursery box support material and four side surfaces are closed. A water vapor generating chamber is provided, and in the water vapor generating chamber, there is supported an air leakage duct having a substantially closed tip made of a breathable sheet having many fine holes substantially evenly, and at the other end of the air leakage duct, outside the water vapor generating chamber. There is a blower to pressurize hot air into the air leak duct, and a spray nozzle to spray water is placed on the outer circumference of the air leak duct. We propose a seedling raising device that contains seedling cultivation soil in which water vapor can flow freely.

In the "breathable sheet" of the air leak duct in the present invention, a synthetic resin film such as polyvinyl alcohol (eg, vinylon) or polyethylene is stretched in one direction and a number of thin cracks are arranged in parallel in the stretching direction. Split fiber non-woven fabrics and various non-woven fabrics in which two split films are placed to form a split film, and the split films are overlapped with each other in a state where the split directions are orthogonal to each other and joined to form fine pores between the split films. A woven fabric, a composite sheet obtained by laminating a reinforcing sheet on a synthetic resin sheet having a large number of fine holes by partial adhesion, and various other breathable sheets are used. Embodiments of the present invention will be described below with reference to the drawings.

[0007]

EXAMPLES In FIGS. 1 and 2, a desired number of seedling raising devices (1) each having an elongated box-shaped steam generating chamber (2) are installed in an ordinary glass-covered greenhouse (H), and these seedling raising devices (1) are installed. Of the blower (4) attached to the upper side wall of the greenhouse (H) through the connecting pipe (5) at the base end of the tubular air leak duct (3) vertically passing through the steam generation chamber (2) of Connected.

The seedling raising device (1) has the following structure. A rectangular horizontal support surface (8) having a wide ventilation interval is formed by connecting the horizontal frame members (7) ... Between the vertical frame members (6) and (6) extending over the entire length in the longitudinal direction of the steam generation chamber (2). , (9) are attached to both left and right sides of the support surface (8) to form an elongated box-shaped frame, and the support is provided on the support surface (8) of the box-shaped frame. Two pairs of left and right pairs of nursery box support members (10) and (10) made of an angle member having a length that extends over the entire length in the longitudinal direction of the surface (8) are laid on the left and right sides, and the four circumferential side surfaces of the generation chamber (2) are made non It is closed by a breathable heat insulating sheet (11). In this generation chamber (2), in the present example, tubular air leak ducts (3), (3) made of polyethylene-based split fiber nonwoven fabric are longitudinally passed in parallel over the entire length of the generation chamber (2) in the longitudinal direction. A large number of clips (12) suspended from the horizontal frame member (7) ...
It is suspended by clasping the joint margins of (3), and 2 above each of the air leak ducts (3) and (3).
The water supply pipes (13), (13), (13), (13), which are arranged one by one, are vertically suspended in parallel with each other over the entire length of the generation chamber (2) in the longitudinal direction, and suspended by the horizontal frame member (7). Metal fittings (1
4), ... (14) ... Horizontally supported by a plurality of spray nozzles (15) ... (15). 15)
, (15) are directed to the outer circumferences of the air leak ducts (3), (3), respectively.

The air leak ducts (3) and (3) are closed at their ends by a string if they are long, but may be loosely opened slightly if they are short. In addition, each water supply pipe (13)
Is closed at the tip and projected at the other end to the outside of the generation chamber (2) and connected to a high pressure pump (not shown).

As shown in FIG. 3 (a), the nursery box of this example has a truncated quadrangular pyramid shape and a ventilation hole (1
7) is formed into a thin rectangular synthetic resin seedling raising box set (18) in which a large number of single seedling raising boxes (16) each having an open end are integrally connected to each other by a flange portion at each opening end. )
As shown in (1), the seedling raising box set (18) is used in a tray (19) having a rectangular dish shape capable of accommodating and having a plurality of ventilation holes (20) on the bottom surface. In both cases, when the seedling raising box set (18) is housed in the tray (19), the ventilation holes (17) on one bottom face are changed to the ventilation holes (20) on the other bottom face.
It has a relationship with ... Each of the above-mentioned seedling raising boxes (16) is filled with a seedling raising soil (21) that retains air permeability such as peat moss, red jade soil, and mulch soil, and the seedlings (22) to be raised are placed in each. Plant.

The blower (4) is an open / closed outside air intake for taking in outside air from the greenhouse (H), and an openable / closed warm air intake connected to a temperature-adjustable warm air generator (23). Each mouth is provided.

The operation of the above example will now be described. Seedling box set (1 with seedlings (22) ... planted in each seedling box (16).
8) is stored in a tray (19), and a large number of the seedling raising box set (18) with the tray is put into the seedling raising box supporting material (10).
(10), (10) (10) are supported on each other in the front-rear, left-right and adjacent directions.

As an example, in the cold season, warm air (for example, 40 ° to 45 ° C.) from the warm air generator (23) is blown by the blower (4) through the connecting pipe (5) to the leak duct (3).
When pumped into the inside of (3), the warm air in the duct is uniformly discharged from the fine holes on the outer periphery of the ducts (3) and (3) as static breeze under static pressure. At the same time, water is pumped to the water supply pipes (13) by a high-pressure pump, and fine mist is jetted from the nozzles (15) to the outer circumference of the air leak ducts (3) and (3). It vaporizes in contact with wind to become water vapor, and at that time, the surrounding heat is cooled by the latent heat of vaporization, but the released warm air rises together with the water vapor while still maintaining a considerable temperature, and for the time being, is placed on the lower surface of each tray (19). Retain evenly, then the above trays (19) ...
Hole (20) ..., each nursery box single unit (16) ... hole (17)
... through the cultivating soil (21) of each nursery box alone, ascending, and then discharged upward from the cultivating soil (21). At that time, most of the water vapor condenses during distribution in the cultivation soil (21) to supply water to the rhizosphere of the seedlings (22) and to radiate heat due to the latent heat of condensation, thereby radiating and circulating warm air. It heats the rhizosphere of the seedlings with the heat of the plant, and when it is released upward from the soil, the residual water vapor condenses in contact with the cold air in the greenhouse to supply water to the seedlings and the latent heat of condensation. The heat is dissipated by the heat dissipation, and the heat dissipation and the warm air allow the soil (21) ...
The upper space is heated.

At night during the warm season, the temperature of the warm air to be pressure-fed to the air leak ducts (3) and (3) may be appropriately lower than that in the above example. Also, when the outside air temperature is extremely high, outside air may be taken in through the outside air intake port and pressure-fed by the blower (4).

[0015]

EFFECTS OF THE INVENTION According to the seedling raising apparatus of the present invention, the steam and the warm air are distributed almost evenly in the seedling growing soil in each seedling raising box, so that the steam is condensed in the soil so as to reach the rhizosphere of the seedlings. In addition to supplying an appropriate amount of water, the rhizosphere can be heated by radiating heat as condensation latent heat and circulating hot air to achieve effective seedling production, and with the advantage that it can be provided at a low cost with a simple structure. Of.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a greenhouse.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged vertical sectional view of (a) seedling raising box set. (B) It is an enlarged vertical cross-sectional view of the tray.

[Explanation of symbols]

 1 Seedling raising device 2 Steam generating chamber 3 Leak duct 4 Blower 8 Supporting surface 10 Seedling box support material 11 Insulation sheet 15 Spray nozzle 16 Seedling box alone 17 Vents 21 Seedling cultivation soil H Greenhouse

Claims (1)

[Claims] 1. A water vapor generation chamber having an upper surface formed as a freely ventilated support surface having a nursery box support material and four side surfaces closed is provided in the cultivation building, and a large number of water vapor generation chambers are provided in the water vapor generation chamber. An air blower for supporting the air leakage duct, which is made of a breathable sheet having fine holes substantially evenly, and whose end is substantially closed, and the other end of the air leakage duct, which is outside the steam generation chamber and should pressurize warm air into the air leakage duct, is provided. A seedling raising device, in which a spray nozzle for spraying water is arranged on the outer circumference of the air leakage duct while being connected, and the seedling raising box is provided with a vent hole on the bottom surface and put a seedling raising soil in which water vapor can flow freely in the box. .