WO2009144018A1

WO2009144018A1 - Agricultural film arrangement having special optical properties

Info

Publication number: WO2009144018A1
Application number: PCT/EP2009/003777
Authority: WO
Inventors: Ludwig Duerrbeck; Joachim Duerrbeck; Gerhard Israel
Original assignee: Gebr. Duerrbeck Kunststoffe Gmbh
Priority date: 2008-05-30
Filing date: 2009-05-27
Publication date: 2009-12-03

Abstract

The invention relates to an agricultural film arrangement comprising two films (1, 2) that overlap each other and have different optical properties, the films partially overlapping each other in an overlapping region (3). In this way, it is possible in a simple manner to create an asymmetrical distribution of the optical properties as viewed from the top. The different optical properties, and further characteristics, may be utilized particularly advantageously in the context of a targeted temperature control. In particular, a film arrangement may also comprise an inflow and/or through-flow region.

Description

Agricultural film arrangement with special optical properties

description

The invention relates to an agricultural foil arrangement, in particular for covering plant dams, in particular asparagus rams according to the preamble of claim 1. Furthermore, the invention relates to fastening devices for Agrarfo- lien and a plant dam, in particular a Spargeldamm having a corresponding agricultural foil arrangement, and a use of the agricultural foil arrangement for covering a plant dam, in particular a Spargeldammes.

In vegetable farming, especially in asparagus growing, foils are used to cover the plant dams used for cultivation. As a result, an influence on the prevailing at or in the plant dam temperature can be achieved, whereby z. B. an extension of the harvest over a longer period can be achieved. In addition, through film use, in particular, an increase in yield and control can be achieved by equalizing the harvest, which then does not take place within a few days or weeks. In addition to the heat effect that can be achieved by a film insert, it may also be of particular interest to achieve quality preservation by cooling during heat periods, which may occur more frequently, especially at the end of the harvest period. In general, use of film in fruit and vegetable cultivation, especially asparagus, improves the working economy. Further advantages of a foil insert, such as pest and / or erosion protection, are known to the person skilled in the art.

The foil insert, z. As in asparagus growing, but must be done with close attention to the temperature achieved. Too high temperatures and strong temperature differences in the spar money bank can cause hollow bars, open heads (bulbs) and rust. Thus, it can not be assumed that the higher the soil heat, the higher the yield. The optimal temperature in the Spargeldamm is 18 to 22 ⁰ C. Especially at temperatures above 44 ⁰ C, which may occur, for example under a black film, direct heat damage to the head. Usually, asparagus cultivation, therefore, different methods are used to produce a plant-temperature optimum. In the case of so-called black and white films (s / w films), the film can be rotated depending on the solar irradiation, whereby either a black film side (for heating the underlying dam) or a white side (for its cooling) is exposed. Furthermore, Spargeldammabdeckungen can be at least partially removed or cooled from above by irrigation. It is also possible to use multi-part cover arrangements, in particular a spargel dam can initially be covered by an black-and-white foil and the entire dam can be covered by a mini-tunnel with an additional foil.

However, the more expensive such methods are, the higher are the labor input and the associated costs.

From DE 200 19 622 IM a cover for elongated, narrow objects, in particular Spargeldämme known. The cover has on its upper side on a symmetrical strip around the longitudinal axis a greater reflectivity for thermal radiation than on the lateral edge regions, the latter having a greater absorption capacity for thermal radiation. This can in particular be prevented that, as shown above, a heat damage, especially of asparagus heads, occurs. By lateral irradiation, however, the desired temperature can be influenced especially in depth. The corresponding film can continue to be provided on its lateral edges with Gewichtsbeschwerungen and wound up non-destructive.

DE 2004 010 060 U1 discloses a plastic film for the cultivation of asparagus, which has a central region whose properties differ from the rest of the film with respect to heat or absorption properties, the middle strip on the top being black, the bottom white, the On the other hand, side strips are transparent.

Also according to DE 296 09 282 U1 is a symmetrical film arrangement for

Cover provided by Spargeldämmen. The region of the covering film intended for covering the asparagus dam crown is opaque, in particular black, which defines certain areas for covering the embankment surfaces The cover can be made translucent at least over a considerable area of the surface. The corresponding arrangement can be produced either by welding three corresponding film strips together or by applying a second film strip to a first film strip, whereby the two film strips completely overlap

Common to the state of the art is that only symmetrical arrangements are provided for covering plant pods. These symmetrical arrangements allow only limited temperature control. When a corresponding foil is rotated, the region covering the dam crown has, for example, either a white or a black color In addition, the asparagus foil can only be removed completely or covered by corresponding further foils. According to the prior art, this means that only a limited, coarse-grained temperature control is possible

There is therefore a need for agricultural yarns with improved temperature regulation and handling properties

The present invention therefore has the object, compared to the prior art in their execution and handling improved Agrarfohen provide, in particular for covering Spargeldammen, which allow a very accurate temperature control, in particular by improved absorption or Kuhleigenschaf- with minimum labor input

The object is achieved by an agricultural frame arrangement according to claim 1

If an agricultural yarn arrangement is provided which has two overlapping films with different optical properties which partially overlap one another in an overlapping area, this makes it possible in a simple way to create an asymmetrical distribution of the optical properties in plan view. An agricultural yarn arrangement is expediently elongate , or has elongate films to correspond to a corresponding elongated bed or dam, for example, consists of such only two overlapping films, it is only necessary during manufacture to bring two film webs in a similar arrangement and to each other by more specified below appropriate procedures - A -

consolidate. Thus, through-colored or single-layered films can be used for the production of the agricultural film arrangement, which means a cost saving compared to two-sided black and white films. In particular, this also makes it possible to make one of the films (selectively) transparent, while the other one is largely opaque. This is not possible with a two-layer film that is turned over to set the respective properties.

In the plan view can be realized by the overlap shown, for example, either a narrow area with a first optical property and a broad area with a second optical property, or a wide area with the first and a narrow area with the second optical property. This allows for four different coverage configurations, as discussed below. It is also conceivable, for example, to provide the film arrangement with an overall width which is greater than the transverse dimension of the plant dam, ie the width of both flanks plus the width of the dam crest. As a result, a continuous change in the optical properties of the film is possible by appropriate displacement of the film in the transverse direction. Thus, an overlap region, if this appears advantageous, for example, in the sense of particularly good insulation, also at least partially abut one of the dam edges. If desired, a part of the dam can remain uncovered. Furthermore, provision may also be made to make the width of the overlapping region controllable, for example by a (non-permanent, for example by a detachable bond) attachment of the foils to each other allows a horizontal displacement or detachable areas are provided with example Perfor rations. Thus, an overlap area, which is provided to cover a dam crest, the width of this dam crown be adjusted.

An overlap area in the illustrated arrangement consists of at least two plies of film material, which can provide additional overlap properties such as improved heat shield or other benefits such as greater mechanical strength (tear strength). It is understood that in addition to the partially overlapping films, the film arrangement may also comprise further films which may at least partly overlap or overlap the partially overlapping films. Particularly preferred embodiments are the subject of the dependent claims

It may be advantageous to use the different optical properties of the overlapping films as different reflection, remission and / or

Forming transmission properties, in particular, it may prove advantageous to make one of the overlapping films white, the other film black, which in cold weather a broad black stripe and in warm weather a broad white stripe facing upward and are aligned towards the sun can

Furthermore, it can also be provided to provide at least one film with a specific spectral selectivity, in particular for infrared and / or ultraviolet radiation, whereby further advantageous properties can be achieved. For example, the film masterbatches Spectrafoil Agπ Yellow or Spectrafoil Agn Black For example, an Agn Black film produced therefrom permits the transmission of thermal radiation which is not absorbed by the film itself (as is the case with conventional film types) (high transmittance in the near infrared range) by means of selected spectral selectivities ( specific absorption or transmission), for example, the growth of weeds and / or fungi can be prevented or suppressed by shielding certain wavelength ranges

According to a particularly preferred embodiment, an agricultural film arrangement has at least one polyethylene-containing film. Polyethylene-containing or completely polyethylene films are advantageous, in particular, when used as agricultural films, since they are light-resistant, weather-resistant and can be processed without problem in conventional textile processing plants, in particular In particular, suitable additives, such as dyes and / or ultraviolet filters, may also be added to such polyethylene foams. It may also be advantageous to provide at least one nonwoven in the agricultural film arrangement which is provided additionally or alternatively to one or more films can

Advantageously, an agricultural film arrangement has at least one adhesive, welded, and / or close connection to welded joints in it By contrast, an adhesive bond, in particular, if necessary, a two-dimensional attachment of two films together achievable thereby a special tensile strength can be achieved A detachable provided adhesion can, as shown above, also for a regulation of the width In certain contexts, close connections can also prove advantageous, for example if a separable seam, for example for removing a film from another film, is desired

It may be advantageous in certain applications that an assembly has at least one film joined to at least one other film by a non-continuous, ie, a permeable, compound, in particular via spot weld, so that water and / or air can intervene therebetween A connection may in particular be made on the abutting surfaces of two films of an overlap region. The respective films may be the overlapping films which are at least interconnected, one of the overlapping films joined to at least one further film, or In particular, spot welding enables a particularly simple and cost-effective production of corresponding foil arrangements with loosely bonded foils

It can also be advantageous that the arrangement has at least one film which is connected to at least one other film by a continuous connection, in particular at least one weld seam, so that the connection is tight, in particular water and / or airtight a connection may in particular be made on the abutting surfaces of an overlap region. In the case of the relevant films, these may also be overlapping films, which are at least joined together (or also with other films), one of the overlapping films, with at least one other A dense connection may be advantageous if it is not desired that, for example, a plant dam communicates with the outside air, so that in this way a special greenhouse effect and a particularly good water vapor storage during dry periods can be achieved Further is, as shown below, at- For example, to form a Wasserstaubereichs a tight film connection required

According to a further particularly preferred embodiment of the invention, which may also be realized independently of the aforementioned features, and for which a separate request for protection, an agricultural film arrangement on an emanation and / or flow area, in particular between the film layers of Überlappungsbereich on This allows a specific cooling of the underlying area of the dam

In this case, advantageously, different configurations can be realized. An inlet and / or flow-through region typically has an outlet region which has at least 5, 10, 25, 50 or 75% of the flow cross-section of the inlet region. If expedient, the outlet region can also be the same or corresponding to the inlet region In particular, such an outlet region has a flow cross-section of 100% of the inlet region, but it may also be provided that the fluid caused by the inlet region Flow resistance is greater than that caused by the outlet area A flow and / or flow area may be provided here in particular between film layers, but it is also conceivable, an input and / or flow area between the dam and d In particular, it is also possible for a film to be applied to another film in a wavy manner, ie in particular a longer film to be connected to a shorter film by means of spaced apart fastenings, so that the influx of air and / or water is favored

Either both the inlet opening and the outlet opening of a through-flow area are in contact with the air space, so that only the flow-through area is cooled by the air movement. The cooling effect can then be delivered to the regions located below the flow-through area

In another embodiment, the Austπttsoffnung a Einstrombereichs be in contact with the underlying covered area, so that, especially in windy conditions, this area is cooled and ventilated A Ent Sprechende arrangement also allows excess moisture and heat in the dam can escape through the inflow and thus moisture and / or heat accumulation is avoided.

By aligning the dam vertically to the main wind direction, a dam can be selectively cooled and / or irrigated by an appropriate arrangement. In this case, it may be provided, for example, at the beginning of the vegetation period, to arrange an inlet opening of an inflow region away from the (prevailing main) wind direction, so that an improved heating is achieved. At the end of the growing season, d. H. at higher temperatures, the film can then be rotated through 180 °, so that the inlet opening assigns to the wind. Furthermore, it can also be provided to provide a flow-through region only on one surface of the film, so that additionally a regulation of the cooling takes place by turning the film, whereby the flow-through region is only at the top in one configuration and can thus be flowed through.

If a foil assembly is provided whose overall width is greater than the transverse dimension of the dam (i.e., the width of the dam crown plus the width of two dam flanks), the agrofoil assembly can be moved in a stepless manner to thereby provide fine temperature control while fully covering the dam. Of course, a corresponding arrangement also only partially cover a dam.

If the inflow or throughflow area is designed accordingly, advantageous flow-dynamic properties can be achieved. For example, an accelerated flow through the area can be effected, which may optionally also exert a suction effect on the underlying dam.

A detachable bond can be used, for example, for the reversible closure of an inflow and / or flow-through region.

Advantageously, an agricultural foil arrangement can furthermore have at least one storage area for the accumulation of water, which can in particular be formed between two mutually overlapping foils which are connected to one another by at least one continuous connection. This allows areas to be storage and in particular also areas for water storage with slowed water delivery to the plant dam are provided.

Particularly in connection with water storage areas, it can prove to be advantageous that an arrangement has at least one perforated and / or needled film. This allows a particularly targeted and metered passage of water.

Advantageously, an arrangement, in particular on two surfaces of a storage area, at least two films with staggered and / or superimposed perforations and / or needling, in particular also of different diameters, having water through larger openings with a larger throughput on and through smaller openings can escape with a smaller flow rate. By "throughput" is here understood a volume per unit of time. This throughput corresponds to a greater or lesser speed. As a result, a congestion effect can be achieved, which allows a metered, slowed release of water from the storage area.

In this context, it may prove to be particularly advantageous that at least one of the films has a hydrophilic and / or swellable material that improves water storage, for example in said water storage areas.

According to a particularly preferred embodiment, which is also sought separately for protection, it is provided for attachment to the sides of a dam, that an agricultural foil arrangement has edge attachment means which as edge winding with a reinforcement, eyelets and / or a fastening cable and / or as edge pockets are formed with weighting means, in particular with incinerable and / or biodegradable weighting means. It can also be provided to form the edge pockets as water-conducting and / or water-pouch pockets, as a result of which the water-conducting and / or storage properties of the film can be further improved. In the case of such water storage pockets, a perforation for entry of water into underlying areas, in particular in the dam base may be provided. Eme Agrarfohenanordnung may also have a, in particular a preformed, water-guiding and / or storage trough, which may preferably be located in the region lying on the dam crown area This makes it possible in a particularly advantageous manner to collect water in certain preferred areas to stow and / or forward

Advantageously, an agricultural frame arrangement may have plant holes which may be formed as cross or die perforations. This makes it possible on the one hand to plant the dam without removing the foil and / or to harvest, on the other hand allows a growth-related bulging of a film around a Pflanzlochung also a mechanical stabilization of plants and / or seedlings and the creation of a specific microclimate

Another object of the present invention is the execution of a corresponding plant dam. In particular, a corresponding plant dam will be used for cultivation or planting with such cultures, which are particularly suitable for a novel foil Advantageously benefit

The present invention furthermore relates to the use of an agricultural yarn arrangement according to the invention, in which the arrangement is placed on a plant dam, in particular a sparrow dam, and is preferably reversible, in which case either the overlapping area is laid onto the dam crest and the non-overlapping areas are applied to the dam flanks, or the inlet and / or flow area is placed on the dam crest and other areas are applied to the edge of the embankment The inventive Agrarfohenanordnung thus initially fulfills functions of a conventional Abdeckfohe

In addition, the Agrarfohenanordnungen by targeted shifting, turning and turning, for example, with respect to the wind direction for targeted temperature control Consider, as shown above, an inventive Agrarfohenanordnung in plan view, so can be used in each case two areas, one of which Area is wider than the other area and also has other optical properties standing the said optical properties in particular associated with heat absorption, either a narrow range with low heat absorption properties and a broad range with good absorption properties, or a narrow range with good absorption properties and a broad range with poorer absorption properties can be used. Turning and turning of the corresponding film arrangement with respect to the state of the sun can be used specifically for temperature control. The film arrangement can furthermore be displaced continuously over the width of the plant dam, so that also approximately an overlapping area can rest at least partially against a dam flag or a part of the dam can be uncovered

Further details and advantages of the invention will become apparent from the following description in which several preferred embodiments are shown by way of example only, but in no way limiting the scope of the invention

The drawing, the description and the claims contain numerous features in combination, the person skilled in the art expediently, of course, individually and / or consider these and other features individually and / or to summarize meaningful further combinations

It shows or show in the drawing

1A is a side view of a preferred embodiment of an inventive Agrarfohenanordnung,

1 B is a plan view from direction x of FIG. 1 A, FIG.

FIG. 1 C is a plan view from the direction y of FIG. 1A, FIG.

2A is a half-perspective view of a preferred embodiment of an applied on a plant embankment inventive Agrarfohenanordnung,

2B shows a half-perspective view of the applied on a plant dam Agrarfohenanordnung according to FIG 2A, which is shown rotated relative to this 180 °, 2C is a half-perspective view of the invention applied to a plant embankment Agrarfolienanordnung according to FIG 2A, which is shown facing this,

FIG. 2D shows a half-perspective view of the inventive agricultural foil arrangement according to FIG. 2C applied to a plant dam, which is shown rotated by 180 ° with respect to this

3A, 3B, 3C, 3D are side views of applied to a plant embankment preferred embodiments of inventive agricultural foil assemblies,

4A, 4B, 4C, 4D are side views of applied to a plant embankment further preferred embodiments of inventive Agrarfolienan- orders,

5A, 5B are side views of applied to a plant embankment further preferred embodiments of agricultural film arrangements according to the invention,

FIGS. 6A, 6B, 6C, 6D are semi-perspective partial views of preferred embodiments of agricultural foil arrangements according to the invention;

Fig. 7A, 7B are semi-perspective views of applied to a plant embankment preferred embodiments of Agrarfolienanordnungen, and

Fig. 8A, 8B are semi-perspective views of applied to a plant embankment preferred embodiments of Agrarfolienanordnungen

FIGS. 9A, 9B, 9C, 9D, 9E, 9F are cross sections through plant beds covered with preferred embodiments of agricultural foil arrangements according to the invention;

10A shows a side view of a preferred embodiment of an inventive agricultural foil arrangement,

10B shows a plan view from direction x of FIG. 10A, FIG. FIG. 1OC shows a top view from the direction y of FIG. 10A, FIG.

FIG. 1OD shows a cross section through a plant dam covered by an agricultural foil arrangement according to FIG. 10A, and FIG

1OE shows a cross section through a plant dam, which is covered with an agricultural foil arrangement according to FIG. 10D, the agricultural foil arrangement being shown turned with respect to this FIG

The same reference numerals designate the same or corresponding elements, wherein a repeated description can be omitted below for the sake of simplicity, provided that the corresponding elements are formed similar or sufficiently similar

1A shows a preferred embodiment of an inventive agricultural film arrangement, which is designated overall by 100, which has a first film 1 and a second film 2 which partially overlap one another in an overlap region 3. In the overlap region 3, the two overlapping films 1, 2 pass through an attachment 4 attached to each other In the overlap region 3 is given by the overlap of the films in this case a particularly good mechanical stability Assuming, for example, that a single foil 1, 2 has a thickness of 110 microns, in the overlap region 3, a thickness of 220 microns can be achieved , which ensures a particularly good tear strength The mechanical stability in the overlap region 3 can be achieved and controlled in particular by a suitable design of the compound 4. The compound 4 can be formed in particular as an adhesive, welding and / or close connection b The reference symbols x and y designate views of the upper side and the lower side of the agricultural frame assembly, respectively. The first and second films 1, 2 have different optical properties, as shown in FIG It is understood that at least one film in this and the following embodiments is also replaceable by a fleece or other covering means known to those skilled in the art, if appropriate. Furthermore, the foils 1, 2 may be either be formed in the region of the individual layers or even in the region of the overlap 3 with additional properties, for example At least one film, in particular a white and / or slightly absorbent film 1, may be provided with a rehep, whereby the film is spaced from underlying plant embankment and thus, for example, a particularly good cooling effect can be achieved due to improved air permeability. A seedling protector can also be obtained by reeding For certain crops, for example in chicory cultivation, it may also be desirable to form a film of the films 1, 2 or at least one further, then additionally to be provided film, especially in the overlap region, completely light-tight, which by a black color and / or a metallic coating is achievable

1A shows a plan view of the agricultural film arrangement of FIG. 1A from direction x. In the respective plan views, two areas with different optical properties can be seen 14, 14 'of the two overlapping films 1 and 2 as well as formed from the overlap region 3 of these films The non-overlapping regions 14, 14' are each formed in one layer The overlap region 3 correspondingly has two layers Fohenmaterial It is understood that in addition to the Fohenlagen 1, 2 further, but not shown Fohenlagen are providable, which overlap the overlapping films completely or partially or may be attached to impact on the films, without departing from the invention

In plan view, a wide area with first optical properties 43, 43 'and a narrow area with second optical properties 40, 40' result. In this case, area 43 may be white and area 43 'may be black in the area of overlap In this case, for example, there is a white, single-layered area next to a white, two-ply area, followed by a black, single-ply area. The transition from FIG. 1B to FIG. 1C corresponds to a turning the Agrarfolienanordnung so that the previously exposed page now rests on the plant embankment and the previously applied to the plant embankment now side up and is exposed

In Fig 2A Agrarfohenanordnungen corresponding to Fig. 1A, 1 B and 1 C are placed on a plant dam 12 The overlap region 3 of each other overlapping foils 1, 2 rests on the dam crown 10, the non-overlapping regions 14, 14 'bear against the dam flanks 11, 11'. The plant dams are illuminated in the image of sun S from left or top left.

The transition from FIG. 2A to FIG. 2B corresponds to a turning (not turning) of the agricultural foil arrangement, so that a broad, in this case black, illustrated foil area with certain optical properties of the sun faces away from or towards S, so that a maximum Radiation is given to this strip. The transition from FIG. 2A to FIG. 2C corresponds to a turning of the agricultural foil arrangement. This ensures that now a broad, here white (not hatched) shown strips the Agrarfolienanordnung with certain optical properties away from the sun or assigns her. The transition from FIG. 2C to FIG. 2D again corresponds to a rotation of the arrangement. From FIG. 2A through FIG. 2B, FIG. 2C to FIG. 2D, four configurations are thus shown that correspond to a decreasing absorption capacity. In practical application, for example, at the beginning of the growing season, when the temperatures are low and a maximum heating effect is to be achieved, the configuration of FIG. 2A is used, assuming that the hatched area has particularly good absorbency. By contrast, at the end of the vegetation period, at higher temperatures or in warmer climates, the configuration of FIG. 2D will typically be preferred, since at this time a warming of a plant dam can no longer be desired, but a maximum cooling effect is to be achieved. For this purpose, it can be provided, for example, that the hatched area of the film arrangement is made dark, or consists of a film material which absorbs or transmits light or infrared radiation which serves to heat the asparagus or plant dam. In particular, it can also be special remission properties of the film, which cause the film to receive (only) particularly effective thermal or infrared radiation, whereas, for example, radiation required for the photosynthesis of weeds is absorbed. The white (unshaded) area of the illustrated film assembly may be bright, especially white, but other low-absorbing or even reflective film materials may be used. In particular, it is also conceivable that at least one film is formed as a nonwoven or other covering means and / or a film is transparent, black, metallic coated, specular, colored and / or provided with special color pigments. FIG. 3A shows an agricultural foil arrangement comprising a first foil 1 and a second foil 2 which overlap in an overlapping area 3 and are connected to one another by non-continuous (non-dense) connections 20

In the overlap region 3, a throughflow region 70 is thereby created, through which air 80 and / or water 90 can flow, whereby in this case the region of the plant dam 12 located below the overlap region 3 can be ventilated and / or metered in a targeted and / or metered manner

FIG. 3B shows a similar arrangement, in which, however, the two films 1, 2 are connected to one another by a firm (tight) connection 21 in the overlapping region 3. The arrangement has a further film 25, which passes through one of the two overlapping films 1, 2 As a result, a flow-through region 70 is again created in the overlap region 3, through which air 88 can flow. By means of the flow-through region 70, cooling of the plant dam below the overlap region 3 is achieved

FIG. 3C shows an arrangement similar to FIG. 3B, but in which a covering film 1 'is integrally formed, and in an overlapping area 3' an overlapping film 25 is applied via non-impermeable (non-dense) connections 20. In an analogous manner, a throughflow region is also formed here Not shown, but equally providable, a film and / or a nonwoven fabric formed analogously to the overlapping film 25 may also be continuous (tight) with the underlying film so that particular mechanical and / or temperature-controlling properties can be achieved

In Fig 3D, an arrangement is shown, which consists of a one-piece cover sheet 1 ', which rich on its Mittelbe, which rests on the dam crown, perforations 30 or needles on the cover sheet is an overlapping film 25 at a continuous attachment 21 and a non-continuous Fixing 20 fastened This creates an inflow space 70 'for air 80, which can enter the plant dam through perforations 30 and effects cooling of the dam. In a similar manner, an inflow space 70' for water 90 can be provided by appropriately designed perforations and / or needles During use, an agricultural foil arrangement or the entire dam can be aimed in a targeted manner in or against the main wind direction in order, for example, to favor or minimize, for example, an influx of wind

4A shows an agricultural film arrangement comprising a first film 1 and a second film 2 which overlap one another in an overlapping area 3. The films are connected to one another at two seams by means of tight connections 21. The film 1 above has needling holes 30 through which water passes 90 may occur in a created in the overlap area storage area 40 In the underlying film 2, if appropriate, also perforations may be provided

4B shows an agricultural foil arrangement which is applied on a plant dam 12 'with an oblique dam crown. The overlapping foils 1, 2 are connected to one another via a fixed connection 21. In the overlapping area 3, a storage area 40 is created. Water can enter this storage area and The storage area 40 may in this case be provided with deflation means, as shown below. If a corresponding storage area 40 is provided, if appropriate, for weighting, no exit perforations are formed, whereas the storage area serves to irrigate the underlying dam, which is the dam fitting foil 2 with holes and / or needles to provide

FIG. 4C shows an arrangement of films 1, 2 overlapping one another, which are firmly connected to one another in an overlapping area 3. In addition, each of the overlapping films 1, 2 is provided with blocking films 41, which are fastened to the films at a sealing seam 21 ' It is understood that a plurality of storage foils 41 can be provided which can form a corresponding number of storage pockets 40, and in particular also the arrangement of the storage foils 41 or pockets 40 can vary

FIG. 4D shows an agricultural film arrangement in which water-retaining pockets 40, which are formed by an envelope of the overlapping films 42, are formed on the edges of the overlapping films 1, 2. 40 can perform other functions, such as those of weighting, control and / or irrigation pockets.

Fig. 5A shows an agricultural sheet assembly having a storage area 40 as shown in Fig. 4A. This storage area 40 is provided with entry needles or holes 30 and exit needles or perforations 31. The outlet openings are formed smaller than the inlet openings, resulting in a metered delivery of the water absorbed in the storage area 40 to the underlying dam.

FIG. 5B shows an arrangement corresponding to FIG. 5A, in which hydrophilic material Hy (shown hatched) is additionally introduced into the storage area 40. This hydrophilic material Hy is formed as a storage and / or storage material and leads to improved retention and metered delivery of the stored water 90 in this area. Accordingly, but not shown in this context, a film with a hydrophilic congestion and / or storage material may be provided, which is overflowed and / or flows through the air, whereby a special, temporally extended cooling effect can be achieved by evaporative cooling. It can also be advantageous to replace a film, which may also be one of the overlapping films 1, 2, with a corresponding hydrophilic material Hy, or to deposit a corresponding material on at least one film and / or to introduce it into it.

Fig. 6A shows possibilities for edge attachment of the agricultural foil arrangements of the above figures. An agricultural film 1 is provided with an edge winding 504, in which a fastening cable 510 is introduced. The fastening cable 510, which may also be firmly connected to the film, is fastened to the ground by means of earth hooks or pegs 511. For tensioning the fastening cable to a fastening cable eye 512, a peg 513 may additionally be used.

FIG. 6B shows a further possibility for the edge attachment of an agricultural foil arrangement. Edge winding 504 has an edge winding reinforcement 501. Edge winding 504 and edge winding reinforcement 501 are provided with holes 520 for receiving pegs 513. Alternatively, instead of holes 520, in particular reinforced eyelets may be provided. The holes 520 can also In particular, a Randwicklungsverstarkung 501 may also be formed as a fabric tape

FIG. 6C shows an arrangement for edge weighting of an agricultural film arrangement. The agricultural film arrangement has an edge envelope 602 which is fastened to the film with an edge seam 603. An edge envelope pocket 604 is provided into which weighting material 605 can be inserted. The weighting material 605 can also be used as a combustible and or biodegradable weighting material 605, so that a corresponding film can be fed directly to the garbage incineration at the end of its service life without the material 605 having to be removed beforehand from the edge envelope pockets 604. It may also be advantageous to additionally provide the blasting material 605 as (hydrophilic) congestion and / or Speicherermateπal for water run, whereby a corresponding double effect can be achieved For this purpose, receiving pockets 604 may be provided for the material with corresponding em- and / or Austrittsoffnungen Furthermore, weighting can also be teπalentfernungsmittel, such as perforations, cracking and / or separable seams be provided

FIG. 6D shows an edge seam of an agricultural film arrangement 711, which is provided by an envelope of an agricultural yarn and a seam seam 713. In the seam pocket 710 thus created, a guide element 714 can be introduced which, for example, permits metered delivery of water to the plant dam base, corresponding openings being providable Furthermore, the guide element can also have a secondary function or a further function as a weighting element and / or a cooling element

7A shows an agricultural film arrangement with a preformed water supply or storage channel 901 provided with a reinforcement 900. In this case, the water channel or storage channel 901 is applied centrally to the plant crown

FIG. 7B shows by analogy an agricultural foil arrangement in which the gutter 901 'provided with a reinforcement 900' is attached to one side of the plant crown, whereby due to the inclined plane a special accumulation effect can be achieved each in connection with a cooling function FIGS. 8A and 8B show partial perspective views of agricultural foil arrangements in which the dam crown is provided with planting holes in the form of a star-shaped or cross-shaped plant perforation.

FIG. 9A shows a preferred embodiment of an agricultural film assembly according to the invention, which is designated as a whole by 990, which has a first film 91 and a second film 92 which partially overlap one another in an overlapping region 93. In the overlapping area 93, the two overlapping films 91, 92 are fastened to one another by a dense or non-tight fastening 94. In particular, a fixing effecting a spacing of the foils can also be provided. In this context, a non-impermeable fastening means a fastening which permits interposition of water or wind, in particular a partial welding with loosely lying on or against each other or a corresponding spot welding. In the overlapping area 93, an overlap region 96 for air 80 and / or water 90 is created by the overlapping of the foils, through which air 80 and / or water 90 can flow into the dam 290. Assuming, for example, that a single film 91, 92 has a thickness of 110 .mu.m, a total thickness of 220 .mu.m can be achieved in the overlapping region 93, which additionally ensures particularly good tear strength. The mechanical stability in the overlapping region 93 can in particular also be achieved and controlled by a suitable design of the connections 94. The connection 94 may in particular also be designed as an adhesive, welding and / or sewing connection which is not dense, ie permeable. It is also conceivable to provide an inflow and / or flow-through region substantially in the longitudinal direction of the dam or else in other directions, so that a dam, which is covered by a corresponding foil, also flows through from the beginning to the end or in all directions can be. At the same time, two non-overlapping regions 930, 930 'are defined by the described arrangement. The non-overlapping regions 930, 930 'may be the same or different from each other. By virtue of the entry of air 80 and / or water 90 through the inflow region into or to the dam 290, a particularly well controllable cooling of the dam can be achieved which promotes the growth of cultivated plants 390 in a particular way. Furthermore, the films 91, 92, either in the region of the individual layers or in particular in the region of the overlap 93 may be formed with additional properties, for example, at least one film, in particular a white and / or low-absorbing film, in particular in the region of Em / or Durchstrombereiches, be provided with a relief embossment, whereby the film is spaced from the underlying plant dam 290 or from an underlying film and thus, for example, a particularly good Kuhleffekt due to improved air permeability or Durchstrombarkeit is achievable For certain crops, such as chicory cultivation can It is also worthwhile to form a film of the films 91, 92 or another film to be provided, especially in the overlap region, completely light-tight, which can be achieved for example by a black color and / or a metallic coating. It is understood that at least one Fo In this and the following embodiments, it is also possible to replace a covering means known from a nonwoven or from another expert, if this is expedient

9B shows an embodiment of an inventive agricultural foil arrangement which in this case is not formed, as in FIG. 9A, by two overlapping foils but essentially by a continuous main foil 910 onto which an overlapping foil 920 is loosely applied, ie non-tight Fasteners 94 are formed in an analogous manner as in FIG. 9A. The overlapping foil 920 creates a throughflow region 96 for air 80 and water 90 which, however, can not flow into the dam 290 in this case. However, the cooling effect of the throughflow becomes at the dam 290 In this way, for example, dam 290 is prevented from drying out by evaporation. In the region of overlapping, certain flow characteristics can be created and exploited. In a simple manner, the arrangement of FIG. 9B also permits control of the cooling effected by flow region 96 by turning the film For example If no cooling is desired at the beginning of the vegetation period, the arrangement can be mounted on the dam so that the overlapping foil 920 points downwards and the main foil 910 points upwards

The arrangement of FIG. 9C is similar to that of FIG. 9B, but perforations or needles 95 are provided here in the main foil 910, through which air 80 and / or water 90 can enter into dam 290 in a metered manner 9A and effects achievable in FIG. 9B are combined to some extent, unlike in FIG. 9A, not all of the air 80 and / or all of the water 90 enter the dam 290. A combined inflow and outflow region 96 is created, for example, with excess water 90 can emerge again, for example, the arrangement of Figure 9 can be additionally cooled by irrigation, without the entire irrigation water enters dam 290

FIG. 9D shows an agricultural foil arrangement which permits a simple irrigation of the dam 290 from above, by providing perforations and / or needles 951, 952. This can be particularly the case with an arrangement with an inflow region, which is connected to the dam 290, and By a different choice of size and arrangement of perforations or needles can be done a metered irrigation As well as the arrangements of the previous figures, this arrangement can be borrowed additionally borrowed from above by sprinkling, wherein in In the case of the arrangement shown in FIG. 9D, a part of the irrigation water 90, 90 'can enter the dam 290. This can be useful if combined cooling and irrigation are to take place through the irrigation

9E shows an embodiment of an inventive agricultural foil arrangement with a main foil 910 and in this case two overlapping foils 920, 920 'This creates two flow areas 96, 96', which can be traversed by air 80 and water 90 In addition, in the main foil perforations and Provision is made for a particularly metered delivery of, for example, water 90 to embankment 290. Furthermore, a corresponding arrangement also allows, for example, the main film 910 with two differently configured surfaces 911 912, which, for example, have different colors and therefore different absorption properties. For example, a black-and-white film may be used which then has a throughflow region 96 or 96 'in both coverage configurations. The overlapping films 920, 92 0 'can be configured identically or differently in a corresponding manner, correspond to the main foil or its respective surface 91 1 or 912, respectively, or deviate therefrom in their design in order to correspondingly control the heating and / or cooling effect FIG. 9F shows an arrangement which has two partially overlapping films 91, 92, which at one edge of the overlap region by a non-tight connection 94, eg spot welding or welding in sections, at the other edge by a tight connection 941, eg a weld seam, are connected to each other Here, too, an emission region 96 is created, which communicates with embankment 290 via perforations 95. It is understood that the two films 91, 92 are dyed the same or different In particular, similarly to the configuration illustrated in FIG. 9B, it is also possible in particular to present, in the arrangement by turning, a inflow region 96. The fixings 94 of FIGS. 9C to 9F can again be analogous to those with reference to FIG formed on the fasteners 94 described in FIG. 9A n

10A shows a preferred embodiment of an agricultural array according to the invention, which is designated as a whole by 400 and which has a first film 91 and a second film 92 which partially overlap one another in an overlap region 93. In the overlap region 93, the two overlapping films 91 are 92, fastened by a preferably non-tight fastening 94 to one another, however, a fastening configuration discussed in the preceding figures may also be provided. This provides a flow-through region 96. It is understood that the flow-through region is also different, as described above in the context of FIG 9F, and that one of the films 91, 92 can have needles and / or perforations, which however are likewise not shown here. The reference symbols x and y denote the top and the bottom of the agricultural yarn arrangement, respectively. The first and second Slides 91, 92 white Here, different optical properties are present, as shown by a different hatching in FIG. 10A. Furthermore, the films 91, 92, either in the region of the individual layers or even in the region of the overlap 93, can be formed with additional properties, as can be In the context of the description of FIG. 9A, the agricultural yarn arrangement may, with respect to the overlapping films 91, 92, be otherwise configured analogously to the embodiments illustrated in FIGS. 1 and 2, as illustrated in FIGS. 10B and 10C Fig. 1OD shows a plant dam covered with an arrangement according to Figs. 10A to 10C. An inflow region 96 is traversed by air and / or wind 80,90. Again, a different arrangement of FIG. 9F is possible.

FIG. 10E shows, analogously to FIG. 10D _1, how a plant dam is covered with an arrangement according to FIGS. 10A to 10C, which, however, is shown turned with respect to FIG. 10D. In contrast to FIG. 10D, here a broad area with good absorption capacity, formed by the overlapping area 93 and a black or absorbent non-overlapping area 930 ', points upwards, which, in contrast to FIG. 10D in particular, achieves a particularly good thermal effect. In addition, if the inlet 989 of the inflow region 96 points away from the wind direction, even better heating can be achieved. Conversely, accordingly, a particularly good cooling effect can be achieved by an orientation of the inlet of the inlet or throughflow region in the wind direction and an exposure of a wide white strip corresponding to FIG. 10D.

Claims

claims

1. agricultural film arrangement, the two interconnected overlapping films (1, 2) having different optical properties, characterized in that the overlapping films (1, 2) each overlap each other partially in an overlapping area (3), and Arrangement two non-overlapping regions (14, 14 ') having mutually different optical properties.

2. Agricultural film arrangement according to claim 1, characterized in that the different optical properties of the overlapping films (1, 2) are different reflection, reflectance and / or transmission properties, in particular one of the partially overlapping films (1) white, the other (2) is black, and / or one of the overlapping films (1, 2) has a different ultraviolet transmittance than the other.

3. Agricultural film arrangement according to claim 1 or 2, characterized in that it comprises at least one polyethylene-containing film (1, 2, 10, 20) and / or a nonwoven

(1, 2, 10, 20).

4. Agricultural film arrangement according to one of the preceding claims, characterized in that it comprises at least one adhesive, welding and / or Nähverbin- düng (4, 20, 21).

5. Agricultural film arrangement according to one of the preceding claims, characterized in that it comprises at least one film (1, 2, 25, 41) which is connected to at least one other film (1, 2, 25, 41) by a non-continuous connection (20). , in particular via a spot weld, so that water (90) and / or air (80) can intervene and / or flow through.

6. Agricultural film arrangement according to one of the preceding claims, characterized in that it comprises at least one film (1, 2, 25, 41), which with at least one other film (1, 2, 25, 41) by a continuous connection (21), in particular via a weld, is connected, so that the connection is sealed, in particular water and / or airtight.

7. Agricultural film arrangement according to one of the preceding claims, characterized in that it comprises at least one storage area (40) for stagnation of water, which is in particular formed between two overlapping films (1, 2, 41, 42) by at least one continuous connection (21) or an envelope (42) are interconnected.

8. Agricultural film arrangement according to one of the preceding claims, characterized in that it comprises at least one perforated and / or needled film.

9. Agricultural film arrangement according to one of the preceding claims, characterized in that, in particular on two surfaces of a storage area (40), at least two films (1, 2) with staggered and / or superimposed perforations and / or needles of different diameters (30, 31 ), wherein water through larger openings (51) with a larger throughput and can escape through smaller openings (52) with lower throughput.

10. Agricultural film arrangement according to one of the preceding claims, characterized in that at least one film (1, 2, 10, 20) has a hydrophilic and / or swellable material (Hy).

11. Agricultural film arrangement, in particular according to one of the preceding claims or the preamble of claim 1, characterized in that the film layers (91, 92, 910, 920) are interconnected in an overlapping region such that in the overlapping region, in particular between the film layers, a Inflow and / or flow area (96) for air (80) and / or water (90) is provided.

12. Agricultural film arrangement, in particular according to one of the preceding claims or the preamble of claim 1, characterized in that it comprises edge fastening means which kung as edge winding (504) with a reinforcement (501), mounting holes and / or eyes (520) and / or a fastening cable (510) and / or as edge pockets (604) with weighting means (605), in particular combustible and / or biodegradable weighting means (605) are formed and / or that the arrangement edge pockets (710), in particular in the form of Wasserleit- and / or storage pockets and / or for receiving a Wasserleitelements (714).

13. Agricultural film arrangement according to one of the preceding claims, characterized in that it has a preformed, in particular with reinforcements (900, 900 ') provided Wasserleit- and / or -speicherrinne (900, 900').

14. Agricultural film arrangement according to one of the preceding claims, characterized in that at least one of the films has a cross or star-shaped Pflanzlochung (950, 951).

15. Plant dam, in particular Spargeldamm, characterized in that it comprises a Agrarfolienanordnung according to any one of the preceding claims.

16. Use of an agricultural film arrangement according to one of the preceding claims, characterized in that the agricultural film arrangement on a plant dam (12, 12 '), in particular a Spargeldamm is placed and reversible, wherein an overlap region (3) is placed on the dam crown (10) and the non-overlapping regions (14, 14 ') are applied to the dam flanks (11, 11').