Method for the cultivation of plants using a carrier with a removable side support structure arranged thereon

Abstract

The invention relates to a method for the cultivation of a number of plants (9), comprising providing a carrier with apertures for said plants (3, 13) and providing a water supply (8), wherein said carrier can be provided on said water supply in a floating manner and wherein a growth medium containing the roots of said plant or the precursor thereof are placed in an air-containing intermediate space (10) in the apertures in said carrier at such a distance from said water supply that said roots of said plant or the precursor thereof are situated at a vertical distance (a) from said water supply, wherein at least two horizontally opposing sides of an upper part of the growth medium are sideways supported along a height (h) by corresponding sides of a removable side support structure (18), removably arranged on top of the carrier.

Claims

1. Method for the cultivation of a number of plants (9), comprising providing a carrier with apertures for said plants (3, 13) and providing a water supply (8), wherein, in a preparatory stage a growth medium (21) is arranged in the apertures, wherein at least two horizontally opposing sides (19) of an upper part (20) of the growth medium are sideways supported along a height (h) by corresponding sides of a removable side support structure (18), removably arranged on top of the carrier, and the roots of the plant or a precursor thereof is placed in the growth medium, wherein, in a first stage of growth of said plant or the precursor thereof, said carrier is provided above or on said water supply, and said plant or the precursor thereof is positioned at such a distance from said water supply that said roots of said plant or the precursor thereof are situated at a vertical distance (a) from said water supply, at least a significant part of the requirement for moisture of said plant or the precursor thereof is satisfied by an intermediate space (10) between said carrier (3, 13) and said water supply and/or by said carrier, wherein said first stage of growth comprises at least a few days, wherein, in a second, further stage of growth of said plant, at least 90% of the moisture requirement of said plant is satisfied directly by said water supply, wherein, after the arranging of the growth medium in the aperture of the carrier, the removable side support structure is removed from the carrier such that the at least two opposing sides of the upper part of the growth medium are exposed and, such as before the second stage of growth, the growth medium can be gripped sideways at the opposing sides, such as by gripping means (22), to lift the growth medium along with the plant from the aperture for increasing the horizontal distance between said plants.

2. Method according to claim 1, wherein said carrier is provided on said water supply in a floating manner, wherein the carrier can be constructed to float by itself or can be provided with a floatable body to facilitate floating.

3. Method according to claim 1 or 2, wherein, during the preparatory stage, after the placement of the plant or a precursor thereof in the growth medium, the plant or the precursor thereof is allowed to germinate in a germination room, wherein the removable side support structure is removed from the carrier before the germination in the germination room.

4. Assembly (23) of a panel-shaped carrier (3) and a removable side support structure (18), removably arranged on top of the carrier, the carrier having apertures for plants (3, 13), wherein a growth medium (21), either or not containing the roots of a plant or the precursor thereof, is placed in the apertures in said carrier, wherein at least two horizontally opposing sides (19) of an upper part (20) of the growth medium are sideways supported along a height (h) by corresponding sides (29) of the removable side support structure.

5. Assembly (23) according to claim 4, wherein, in top view, the removable support structure has a shape and outer dimensions identical to the shape and outer dimensions of the carrier.

6. Assembly (23) according to claim 4 or 5, wherein, when seen in top view, the apertures of the carrier are arranged in a pattern comprising a plurality of parallel rows (24), each row in a row direction (X) having a row length of multiple apertures.

7. Assembly (23) according to claim 6, wherein the removable side support structure is formed as one integral element.

8. Assembly (23) according to any one of the claims 4-7, wherein the removable side support structure has a plate-like shape.

9. Assembly (23) according to any one of the claims 6-8, wherein the carrier comprises upward protrusions (25) positioned between adjacent apertures in a row to sideways support horizontally opposing sides (26), opposing in the row direction, of the upper part of the growth medium, in such a way that the growth medium is sideways supported, and enclosed by, the combination of protrusions and the removable side support structure.

10. Assembly (23) according to any one of the claims 4-9, wherein, when seen in top view, the removable side support structure has a pattern of apertures in the form of through-holes (30) matching the pattern of the apertures (6) of the carrier, the through-holes having a vertical through-hole length at least equal to the height (h).

11. Assembly (23) according to any one of the claims 4-10, wherein the growth medium is self-adhesive.

12. System comprising a water supply, filled with water, wherein an assembly (23) according to any one of the claims 4-11 is provided on or above said water supply, such as by floating on the water supply, wherein in a first stage of growth the plant or the precursor thereof is positioned at such a distance from said water supply that said roots of said plant or the precursor thereof are situated at a vertical distance (a) from said water supply, wherein at least a significant part of the requirement for moisture of said plant or the precursor thereof is satisfied by an intermediate space (10) between said carrier (3, 13) and said water supply and/or by said carrier.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The invention will be described in more detail below with reference to an exemplary embodiment illustrated in the drawing, in which:

[0030] FIG. 1 diagrammatically shows a perspective view of a cultivation space provided with a number of floats or panels, according to the prior art;

[0031] FIG. 2 shows the top side of a prior art panel in perspective;

[0032] FIG. 3 shows the bottom side of the prior art panel shown in FIG. 2;

[0033] FIG. 4 diagrammatically shows a detail of the prior art panel in cross section with a developing plant in a first stage of growth;

[0034] FIG. 5 shows the detail from FIG. 4 in a second stage of growth of the plant;

[0035] FIG. 6 shows an assembly of a carrier and a removable side support structure according to the invention;

[0036] FIG. 7 shows a cross-section of the embodiment of FIG. 6 in a vertical plane along the length of the assembly; and

[0037] FIG. 8. shows another embodiment of the carrier with the removable side support structure removed from the carrier or float.

DETAILED DESCRIPTION

[0038] In FIG. 1, reference numeral 1 denotes a prior art cultivation space which accommodates the floats or plates 3 according to the prior art in a water-filled basin 2. The cultivation space is shown here as a greenhouse, but it should be understood that any kind of cultivation space can be used, optionally provided with natural and artificial lighting. It is likewise possible to place the basin 2 with floats 3 in the open air. Basin 2 is filled with water on which the floats 3 float. The water level is indicated in FIG. 4 by reference numeral 8. By means of such a structure, the climate for the plant can be optimized and it is also possible to simplify the logistics in a cultivation space. One or more floats or panels can be moved in a basin and, for example, moved to a processing space or to another basin, depending on the development of the crop and/or on whether certain parts thereof have already been harvested.

[0039] FIG. 2 shows a detail of a float or panel 3 according to the prior art, i.e. without the removable side support structure according to the invention being arranged thereon. This consists of a body material which, in the present exemplary embodiment, is preferably a foam material made from hard plastic, such as for example a polystyrene material. However, it is also possible to produce it from another material or combination of different parts. As can be seen in FIG. 2, the top surface, which is denoted by reference numeral 5, is of a design which is curved in such a manner that water which is present thereon flows away into the basin. Thus, no water will remain on the upper surface 5 of the float or panel. Continuous apertures or holes 6 are provided in the float or panel. FIGS. 2 and 4, 5 show that these are provided with a vertical edge 14 which is raised with respect to the direct surroundings of the upper surface 5 of the panel. FIG. 3 shows details of the bottom side of the panel and it can be seen that it is provided with a number of chambers 7 which are gas-tight towards the top and open towards the bottom.

[0040] In FIGS. 4 and 5, it can be seen that, on the one hand due to the buoyancy of the body 4 and, on the other hand, due to the volume of gas caught in the chambers 7, the panel or float 3 floats on the water 8. Due to the latter fact, fewer or no requirements are imposed on the buoyancy of the material of the body 4 (see FIGS. 2 and 3). The length of the holes 6 is such that, on the bottom side, they extend up to and preferably into the water. Thus, a number of protected spaces are created for the plant which is denoted by reference numeral 9 in FIGS. 4 and 5.

[0041] In this prior art example, this plant is accommodated in a container 13 and the root system thereof consists of a root neck 11 and the actual roots 12 originating therefrom. These are situated inside the tubular space 10 of hole 6. Inside this space, which is delimited by tube 15, a microclimate exists which has a positive effect on the development of the root system.

[0042] During the first stage of growth illustrated in FIG. 4, the root system is at a distance a from the water surface 8. It has been found that, due to this microclimate, the plant develops downwards. It is assumed that as a result of the relatively low moisture content in the space between the water level 8 and the bottom side of the carrier, that is to say intermediate space 10, compared to the known systems, the roots strive to reach the water level 8 as quickly as possible. In any case, it has been found that the roots develop particularly quickly in the downward direction, starting from the root neck 11.

[0043] This development is illustrated in FIG. 5 and shows the results which are achieved after only a few days. The length of the actual root which is situated in the air, that is to say the intermediate space, is denoted by reference 1 and is smaller than the height of the intermediate space, that is to say there is no contact with the water. This length varies depending on the way in which growing takes place. In the present example, a substrate is used and the length is defined as the part which is below the substrate. If no substrate is used, the length is that part which extends directly below the root neck itself. This part can grow in a few days.

[0044] It has been found that the space in which the root system develops has an optimum climate which is particularly rich in oxygen.

[0045] The prior art as well as the present invention seek to provide a combination of preferably aeroponic and hydroponic cultivation. That is to say that during the first stage of growth, the largest part of the water requirement of the developing plant is supplied by the environment, that is to say the air or the substrate. Only during the second stage of growth is the largest part of the of the water requirement satisfied by the water supply.

[0046] The water supply will preferably be kept in motion in order to prevent the development of unwanted diseases and the like. In addition, fertilizers can be supplied continuously, depending on the development of the plant. In the space which is situated below the root neck and above the water level, (air) roots 16 may be formed.

[0047] FIG. 6 shows an assembly 23 of a carrier 3 and a removable side support structure 18 according to the invention. The removable side support structure 18 is removably arranged on top of the float or carrier 3, wherein the carrier 3 may have buoyancy for the floating cultivation of plants or can be provided with a floatable body. The carrier 3 may also be held in position by fixed holding means (not shown), i.e. the carrier 3 is held in fixed position with respect to the water supply. The carrier 3 has a grid of apertures 6 for said plants. The carrier 3 can be provided on a water supply in a floating manner. A growth medium 21 containing the roots of a plant or the precursor thereof is placed in an air-containing intermediate space 10 in the apertures 6 in said carrier 3 at such a distance from said water supply that said roots of said plant or the precursor thereof are situated at a vertical distance (a) from said water supply. According to the invention, at least two horizontally opposing sides 19 of an upper part 20 of the growth medium 21 are sideways supported along a height (h) by corresponding sides 29 of the removable side support structure 18. The opposing sides 19 of the growth medium 21 as well as the sides 29 of the removable support structure 18 will normally extend in a substantially vertical direction, i.e. in a substantially vertical plane, during the position of use.

[0048] As shown in FIG. 6, the removable support structure 18 has a shape and outer dimensions identical to the shape and outer dimensions of the carrier 3. When seen in top view, the apertures 6 of the carrier 3 are arranged in a pattern comprising a plurality of parallel rows 24, each row 24 in a row direction X having a row length of multiple apertures, such as 3. The removable side support structure 18 is formed as one integral element, for instance made of plastic, for example in a single injection moulding step. The removable side support structure 18 has a plate-like shape.

[0049] However, it is conceivable that, instead of the removable side structure being formed as one integral element, multiple removable elongated strips are used to support the at least two opposing sides of the growth medium. The multiple elongated strips may be interconnected in some way if desired.

[0050] The carrier as shown comprises upward protrusions 25 positioned between adjacent apertures 6 in a row 24 to sideways support horizontally opposing sides 26, i.e. opposing in the row direction X, of the upper part 20 of the growth medium 21, in such a way that the growth medium 21 is sideways supported, and enclosed by, the combination of protrusions 25 and by corresponding sides 29 of the removable side support structure 18.

[0051] In this respect, it is furthermore conceivable that, instead of the removable side support structure 18 being a static structure, statically arranged on the carrier 3, a moveable side support structure 18 is used to provide sideways support to the growth medium 21, at least during the arranging of the growth medium 21 in the aperture 6 of the carrier 3. In this respect moveable means moveable relative to the carrier 3, especially in a horizontal plane or direction, in particular along the top surface of the carrier 3.

[0052] The carrier 3 (by itself) may for instance be transported on a conveyor system (not shown) in a horizontal direction into a filling zone of the conveyor system provided with (static) elongated members (not shown) extending in the row direction X, the elongated members being configured to fit accurately between adjacent rows 24 and having a length at least equal to the row length. When the carrier 3 is moved sufficiently far into the filling zone and the elongated members are positioned between the adjacent rows 24, along the whole length of the adjacent rows 24, the growth media 21 can be arranged in the apertures 6 of the carrier 3. The sides of the elongated members then provide sideways support to the opposing sides 19 of the growth medium 21 during the filling process. The protrusions 25 are still required to provide sideways support to the other sides 26 of the growth medium 21 not supported by the elongated members. After all the apertures 6 have been filled with growth medium 21, the conveyor is activated again and the carrier 3 is moved in the row direction X again (along the length of the elongated members) out of the filling zone. This last step basically constitutes the removal of the removable side support structure 18.

[0053] When seen in top view, the assembly 23 of the carrier 3 and the removable side support structure 18 show a pattern, for instance a grid-like pattern, of apertures in the form of through-holes 30, for instance square, rectangular or circular through-holes, matching the pattern of the apertures 6 of the carrier 3, the through-holes 30 having a vertical through-hole length at least equal to the height (h).

[0054] Prior to arranging the assembly 23 on the water-basin, such as by floating or by arranging the assembly 23 at a fixed distance from the water basin, the growth media 21 may be supported from below by a support plate 28 having upward protrusions 27, preferably conically shaped, on which the growth media 21 initially rest. Each air-containing space 10 preferably comprises such a protrusion 27.

[0055] FIG. 7 shows a cross-section of the embodiment of FIG. 6 in a vertical plane along the length of the assembly 23.

[0056] FIG. 8. shows another embodiment of the carrier 3 with the removable side support 28 structure removed from the carrier or float 3. The growth media 21 of a row 24 can be clearly seen to have two opposing sides 19 exposed allowing gripping means 22 to engage the growth medium 21 and lift it, along with the plant, out of the aperture 6.

[0057] It will be clear that where the term plant is used in the above description, this is also understood to include seeds, cuttings and the like. This means that the above-described plant may be grown from a seed.

[0058] Using the method according to the invention, it is also possible to cultivate numerous kinds of plants. Lettuce and chrysanthemums are mentioned by way of example.

[0059] After reading the above, those skilled in the art will immediately be able to think of variants which are obvious and fall within the scope of the attached claims. Reference is made in particular to the alternative use for the ordinary cultivation of plants, i.e. without hydroponic cultivation, in a tray or the like. However, the present invention especially provides significant advantages in combination with hydroponic cultivation.

LIST OF REFERENCE NUMERALS

[0060] 1. Cultivation space

[0061] 2. Water-filled basin

[0062] 3. Float or panel

[0063] 4. Body

[0064] 5. Upper surface of the panel

[0065] 6. Aperture in float

[0066] 7. Chamber

[0067] 8. Water level

[0068] 9. Plant

[0069] 10. Intermediate, tubular space

[0070] 11. Root neck

[0071] 12. Roots

[0072] 13. Container

[0073] 14. Vertical edge

[0074] 15. Tube

[0075] 16. Air roots

[0076] 17. -

[0077] 18. Removable side support structure

[0078] 19. Horizontally opposing side

[0079] 20. Upper part of growth medium

[0080] 21. Growth medium

[0081] 22. Gripping means

[0082] 23. Assembly of carrier and removable side support structure

[0083] 24. Row of apertures

[0084] 25. Upward protrusion

[0085] 26. Horizontally opposing side in row direction

[0086] 27. Initial support protrusions

[0087] 28. Initial support plate

[0088] 29. Side of removable side support structure

[0089] 30. Vertical through-hole in removable side support structure