JPH06511499A - Compositions and containers for inhibiting plant root growth and methods of use thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Compositions and containers for inhibiting plant root growth and methods of use thereof technical field The present invention relates to inhibition of plant root growth, and more specifically, to inhibition of plant root growth. Concerning the use of copper for industrial purposes.

Background of the invention Cultivated plants are often grown by first germinating seeds in situ or by rooting cuttings. and then propagated by transplanting the seedlings or explants to other locations. example plants can be grown first in a nursery and then transplanted to a permanent location by the customer. Ru. However, transplanting is harmful to the plant.

One problem with transplanting is that the plant's root system is damaged when the plant is moved from its original location. It is possible to get hurt. Plants with damaged root systems often experience transplant shock. , which slows plant growth and in some cases kills the plant. transplant To reduce shock, plants are first grown in containers and then transplanted.

Moving plants from containers is less likely to damage the plant's root system than digging the plant out of the ground. . A variety of plants, including satsatsu, trees, and shrubs, are first grown in containers and then transplanted. be done. But transplanting plants from containers also presents some problems. one question The problem occurs when plants such as Satsuma cabbage are grown in containers that are placed close together. Koru. As each plant's root growth extends beyond its container and roots the neighboring plant, the roots The system is damaged and the plants undergo transplant shock. of plants grown in containers Another problem with containers is that they prevent the plant's root system from growing naturally. Ru. In the natural environment, the root system of a plant is responsible for stabilizing the plant and maximizing its nutritional intake. It extends horizontally and vertically for relatively long distances from the plant. Root system growth range in containers The enclosure is limited, and the roots grow back against the container walls, creating a tangled root port in the shape of the container. be made to grow.

Chemical root pruning has been used to suppress root growth in plant containers. . Chemical root pruning involves using chemicals such as copper compounds to stop root growth. including. For example, mixtures of commercially available acrylic latex paints and copper carbonate or copper hydroxide. effectively inhibits root growth when applied inside plant containers. The root is con When approaching the sides of the tena, the copper in the latex paint is adsorbed by the roots, stopping root growth. Melt. The root threads then branch at the point of inhibition of root growth. Plant root systems are relatively natural It maintains its length, but the growth of the root system is reduced. When the plant is transplanted, the root system will grow normally. regain.

United 5tates Department of Agriculture Container Tree Nursery Ma published by ure nual, vol, 2. Containers and Growing Me According to dia (Dec, 1990), a typical copper paint for plant containers is About 60 to about 200 grams of copper compounds per liter of commercially available latex paint, e.g. For example, it contains copper carbonate. The use of pot compounds in paints is commercially desirable. Therefore, a variety of plants An economical composition that consistently inhibits root growth of plants is desired.

Outline of the invention The present invention includes a source of cupric ions dispersed in a coating-forming matrix, by providing compositions for inhibition of plant root growth that are titanium-free. This solves the above problems in the prior art. Suppression of plant root growth as mentioned above Copper compositions for fabricated using commercially available latex paints as paint matrix do. Commercially available latex paints typically contain substantial amounts of titanium dioxide. Conte The titanium and cupric ions in the paint, as well as other metal ions, are ionized by plant roots. compete for adsorption sites. Therefore, titanium can occupy adsorption sites in plant roots. and the copper in the prior art root control paint inhibits root growth as effectively as possible. inhibit ability. The substantially titanium-free compositions of the present invention improve plant root growth. Make better use of copper for suppression.

More specifically, the compositions of the invention incorporate metallic micronutrients into a film-forming matrix. It can be further contained dispersed in the water. Suitable metallic micronutrients include iron and porium. It contains elements such as chlorine, zinc, manganese, molybdenum, and magnesium. like that Micronutrients also compete with cupric ions and other metal ions for adsorption sites on plant roots. fight Since titanium is not present in the composition of the invention, metallic micronutrients are more It is valid. In particular, the compositions of the present invention contain iron oxide, which is a source of micronutrient iron ions. It is preferred that further inclusions are present in an amount of % by weight.

In particular, the compositions of the present invention contain a film forming agent such as latex as part of the matrix. include. Preferably, the latex is present in an amount of about 2% to about 30% by weight of the composition.

In particular, the matrix further comprises fillers and water. In particular, the matrix is a moisturizer, Powders, surfactants, thickeners, defoamers, and preservatives may also be included. deer However, the compositions of the present invention may also contain other ingredients such as coalescing agents, co-solvents and pest control compounds. It should be understood that it can include.

According to another aspect of the invention, a coating covering the inner surface and at least a portion of the inner surface of the container is provided. a coating film formed from the above-described composition of the present invention and dispersed in a matrix; Contains a source of cupric ions and is substantially titanium-free for plant root systems and soil preservation. Containers are provided for holding. The coating on the inner surface of the container is about 3 to 3 coats thick. a cupric ion source in an amount of 0% by weight; an elastomer in an amount of about 10% to about 65% by weight of the coating; - and filler in an amount of about 20% to about 70% by weight of the coating. Especially painted The film can further include metallic micronutrients in an amount of about 1% to about 8% of the coating.

According to yet another aspect of the invention, soil and plants are placed in the container of the invention as described above. A method of inhibiting the growth of a plant's root system is provided, the method comprising preserving the root system. Book The method of the invention can be used to grow the roots of a variety of plants, including trees, shrubs, vegetables and cereals, such as rice. suitable for suppressing

It is therefore an object of the present invention to provide improved control of root growth in containers. Ru.

Yet another object of the invention is to provide an improved plant container.

Yet another object of the invention is to provide an improved method for propagating and transplanting plants.

Other objects, features, and advantages of the invention will be apparent from the following detailed description and claims. It will be.

Detailed description of preferred embodiments Generally, the compositions of the present invention include a source of cupric ions dispersed in a coating-forming matrix. Contains substantially no titanium. The composition of the invention can be applied to the inner surface of a plant container. It can be used to prevent root growth of plants in containers. Main departure The cupric ions from the composition of Ming are adsorbed onto the adsorption sites of the plant roots and are deposited on the container walls. Stops plant root growth just before.

In the case of the present invention, since there is no titanium in the film-forming matrix, more of the plant roots ion adsorption sites can be utilized for cupric ions, and cupric ions be used more effectively.

The cupric ion source is preferably copper hydroxide, but other suitable sources include copper carbonate, copper sulfate, Includes basic copper sulfate and cupric oxide. The compositions of the present invention have about 2 to about 2 parts of the composition. Preferably, it contains cupric ions in an amount of 0% by weight.

After applying the composition of the present invention to the inner surface of a plant container to form a coating, the coating will be approximately 3. - preferably about 30% by weight of a cupric ion source.

Preferably, the matrix of the present invention comprises a coating-former, which is an acrylic latex. x, vinyl acetate latex or styrene-butadiene latex. preferable. The film-forming agent functions as a binder when the composition dries. of the present invention When the composition forms a coating on the inner surface of the plant container, the elastomer in the latex The solid components of film-forming agents such as Exists.

The compositions of the invention also include fillers that provide porosity and structure to the resulting dry coating. Can be done. Suitable fillers include calcium carbonate, melamine resin formulations, various types clay, amorphous silica, precipitated silica or diatomaceous earth. The composition of the invention Preferably, the filler is present in an amount of about 15% to about 50% by weight of the composition.

For dry coatings, the filler is preferably present in an amount of about 20% to about 70% by weight of the coating. Yes.

The composition of the invention may further include metallic micronutrients dispersed in the matrix. I can do it. Metallic micronutrients also compete for ion adsorption sites in plant roots, Since the composition of the invention is substantially free of titanium, it is less likely to contain such metallic micronutrients. It can be used effectively. Suitable metallic micronutrients include iron, boron, zinc, and manganese. , molybdenum and magnesium. In particular, the compositions of the present invention contain colorants and It can contain iron oxide, which acts both as a source of iron and as a micronutrient. iron helps prevent bleaching in plants. Metallic micronutrients make up about 0.0% of the composition. 5 - Preferably present in an amount of about 5%. In the case of dry coatings, metallic micronutrients are Preferably, it is present in an amount of about 1% to about 8% by weight of the membrane.

The compositions of the invention provide freeze-thaw stability to the composition and serve as processing aids or co-solvents. It can also contain humectants that act as moisturizers. In a suitable moisturizer, it is present in amounts up to is preferable.

The compositions of the present invention improve shelf life of the composition by stabilizing the dispersion of solids in the composition. Dispersants may also be included to extend life. Polymer electrolysis is a suitable dispersant. lignin sulfonates and naphthalene derivatives. Composition of the invention Preferably, the dispersant is present in an amount up to about 4% by weight.

The composition of the present invention enhances the function of the dispersant and reduces the surface tension of the composition. It may also contain a surfactant to provide better coverage and toughness to the surface of the plant container. I can do it. Suitable surfactants include phosphate esters, block copolymers , sulfosuccinates, salts of sulfonated alcohols, ethoxylated alcohols and and tetramethyldecynediol. Furthermore, the composition of the present invention has a viscosity A thickener may also be included to increase storage stability. Suitable thickener These include xanthan gum, polysaccharide gum, cellulose derivatives, polymeric thickeners, and clay. This includes: The compositions of the invention further include anti-foaming to reduce foaming during manufacturing. can contain agents. Suitable antifoam agents include oil, dimethyl silicone and tetramethylene. Contains ludaisendiol. The composition of the present invention can further be used by microbial decomposition. Contains preservatives to extend the shelf life of the product by removing damage caused by I can do it. Suitable preservatives include 1,2-benzisothiazolin-3-one and Contains lumaldehyde.

In the compositions of the present invention, surfactants are present in amounts up to about 4% by weight of the composition. Preferably, the thickener is present in an amount up to about 3% by weight of the composition. The composition may also contain other additives such as co-solvents, other pest control compounds or coalescence aids. be able to. Suitable co-solvents include methanol and isopropyl alcohol. These reduce drying time by evaporating away the water in the composition. . Suitable pest control compounds include soil sterilizers, insecticides and systemic fungicides. is included. Suitable coalescing agents include alcohol esters, amminated products, or butanes. Chircellosolve materials are included and these also reduce the drying time of the composition. Finally the book Compositions of the invention can be prepared with up to about 40% water by weight.

Description is designed to demonstrate how to carry out the invention to one of ordinary skill in the art. The invention is further illustrated by the following examples which illustrate the present invention.

Water 36.9 g, 1 36.9 37.0 32.0 36.9 propylene Recall 4.0 4.0 4.0 4.0 4.3 4.3 GAFACR36 100,50,50,50,50,50,5TAMOL850 1.0 1.0 1.0 1.0 1.0 1.0 PROXELGXL O,070,070, 070,070,0? 0.07 Cupric hydroxide 8.0 2.0 4.0 8. 0 8.0 8.2 MAPICO iron oxide 4.0 3.8 3.0 3.0 3 ．． 5 3.5 ATOMITE 35.0 41.0 40.0 35.9 30 ,4　34.8KELZANARO,30,30,350,330,30,38 B748 0.2 0.2 0.2 0.2 - 0.2 Composition of Example 1-6 are shown in Table 1 as Examples 1-6. GAFACR3610 is an aliphatic alcohol Dispersant containing phosphate ester, available from Cranbury, New Je. available from Rhome-Poulenc, Rsey. TAMOL 85 0 is the amount containing polymer electrolytes such as sodium or potassium salts of polymeric carboxylic acids. Powder, Ph1lidelphia, Penn5lyvania Rohm It is available from and Haas, and PROXEL GXL is Wi 1mi ngton, a preservative available from ICI Chemical in Delaware. It is a drug. Copper hydroxide is a technical grade containing about 575% copper element. MAPICo cOlumbian Chemicals in Atlanta, Georgia It is a black iron oxide available from the Company. ATOMITE is Calcium Carbonate Filler containing sium, ECCAm from Sylacauga, Alabama Available from Erica. KELZAN AR is a thickener containing polysaccharide. Available from KELCO, San Diego, Calif. . BB 748 is Witco C from New York, N.Y.

It is an antifoaming agent available from Rporation. UCAR413 is Danbu ry, Connecticut available from Union Carbide. It is a krylic latex binder and has a solids content of about 47%. Other suitable lattes The box is UCAR429, also available from Union Carbide. Ru.

Water, propylene glycol, GAFACR3610, TAMOL iron oxide, ATO Add MITE and KELZAN AR to Colorless mixer and mix for 15 minutes. continued. Then add BB748 and UCAR413 to the mixture for another 30 minutes Continued shearing.

Compositions from Examples 1-6 were evaluated for root control efficiency. 1 quart of the composition A plastic pot (4.5 inch diameter x 4.5 inch height) was coated.

After drying, the pots are filled with a peat moss-based soil mix and used to grow corn for feed. A field corn) was sown.

Plants were held for 30 days, at which point any abnormal growth characteristics (i.e., chlorosis, necrosis, undergrowth) were detected. Plants were evaluated subjectively for root inhibition (stunting), 0-1 It was evaluated subjectively using a 00% scale. In the evaluation, 0% equals no root suppression. and 100% equals 100% root suppression.

The results of the root suppression experiment are also shown in Table 1.

For comparison, a composition containing copper hydroxide dispersed in 5ears white latex paint The plants were evaluated for root inhibition using the root inhibition test described above. Copper hydroxide is a paint It was present in an amount of 100 grams per liter. Examples 1-5 are each 5ea It inhibited roots at a higher percentage than the rs paint composition.

The foregoing description relates merely to particular embodiments of the invention, and the following claims refer only to specific aspects of the invention. Numerous changes may be made therein without departing from the spirit and scope of the invention as defined. It is Noh.

Continuation of front page (51) Int, C1,5 identification symbol Internal office reference number C08L 101100 CO9D201100 PDC7415-4JI

Claims (41)

[Claims] 1. Contains a source of cupric ions dispersed in the film-forming matrix and contains substantially titanium ion. A composition for inhibiting plant root growth that does not contain 2. Claim 1 further comprising metallic nutrients dispersed in the matrix. Compositions as described. 3. Metallic micronutrients include iron, boron, zinc, manganese, molybdenum and magnesia. 3. The composition of claim 2, wherein the composition is selected from the group consisting of: 4. The composition according to claim 1, further comprising iron oxide. 5. 2. The composition of claim 1, wherein the cupric ion source comprises copper hydroxide. 6. Claim 1 wherein the source of cupric ions is present in an amount from about 2 to about 20% by weight of the composition. The composition described in . 7. 2. The composition of claim 1, wherein the matrix comprises latex. 8. Claim 7, wherein the latex is present in an amount from about 5% to about 40% by weight of the composition. composition. 9. 7. The composition of claim 6, wherein the matrix comprises latex. 10. A composition according to claim 1, wherein the matrix comprises latex and filler. . 11. A set according to claim 1, wherein the matrix comprises latex, filler and water. A product. 12. The matrix contains latex, filler and water, and the cupric ion source is The latex is present in an amount of about 2% to about 20% by weight of the composition, and the latex is present in an amount of about 5% to about 40% by weight of the composition. %, the filler is present in an amount of about 15% to about 50% by weight of the composition, and the water is present in an amount of about 15% to about 50% by weight of the composition. The composition of claim 1, wherein the composition is present in an amount from about 0 to about 40% by weight of the composition. 13. Furthermore, it contains metallic micronutrients dispersed in the matrix, 13. The composition of claim 12, wherein the nutrient is present in an amount of about 0.5 to about 5% of the composition. thing. 14. The matrix is latex, filler, water, humectant, dispersant, surfactant, 2. A composition according to claim 1, comprising a thickener, an antifoam agent and a preservative. 15. The matrix is latex, filler, water, humectant, dispersant, surfactant, including thickeners, defoamers, and preservatives, and the source of cupric ions accounts for about 2 to about 20% by weight of the composition. % and the latex is present in an amount from about 5% to about 40% by weight of the composition and the filler the agent is present in an amount from about 15% to about 50% by weight of the composition, and water is present in an amount of about 40% by weight of the composition. the humectant is present in an amount up to about 10% by weight of the composition, and the dispersant is present in an amount up to about 10% by weight of the composition. The surfactant is present in an amount up to about 4% by weight of the composition, and the surfactant is present in an amount up to about 4% by weight of the composition. the binder is present in an amount up to about 3% by weight of the composition, and the antifoam agent is present in an amount up to about 3% by weight of the composition. The preservative may be present in an amount up to about 2% by weight of the composition. The composition according to claim 1. 16. an inner surface, and a fourth layer covering at least a portion of the inner surface and dispersed in the matrix. Plant root systems and soil containing a coating that contains a source of copper ions and is substantially free of titanium. A container for holding jars. 17. The coating further contains metallic micronutrients dispersed in the matrix. Container described in range 16. 18. Metallic micronutrients include iron, boron, zinc, manganese, molybdenum and magnetism. 18. The container according to claim 17, wherein the container is selected from the group consisting of: 19. 17. The container of claim 16, wherein the coating further comprises iron oxide. 20. 17. The container of claim 16, wherein the cupric ion source comprises copper hydroxide. 21. Claim 1 wherein the cupric ion source is present in an amount from about 3 to about 30% by weight of the coating. 6. The container described in 6. 22. 17. The container of claim 16, wherein the matrix comprises an elastomer. 23. Claim 22 wherein the elastomer is present in an amount from about 5% to about 65% by weight of the coating. Container as described in. 24. 22. A container according to claim 21, wherein the matrix comprises an elastomer. 25. 17. The core according to claim 16, wherein the matrix comprises an elastomer and a filler. antenna. 26. The matrix contains the elastomer and filler, and the cupric ion source is in the coating. The elastomer is present in an amount of about 3% to about 30% by weight, and the elastomer is present in an amount of about 10% to about 65% by weight of the coating. and the filler is present in an amount of about 20% to about 70% by weight of the coating. 16. The container according to 16. 27. Furthermore, it contains metallic micronutrients dispersed in the matrix, 27. The container of claim 26, wherein the nutrients are present in an amount of about 1% to about 8% of the coating. 28. an inner surface, and a fourth layer covering at least a portion of the inner surface and dispersed in the matrix. Soil and plants in a container containing a substantially titanium-free coating containing a source of copper ions. A method for inhibiting the growth of root threads in plants, including the step of preserving root threads. 29. The coating further contains metallic nutrients dispersed in the matrix. The method according to range 28. 30. Metallic nutrients include iron, boron, zinc, manganese, molybdenum, and magnetism. 30. The method of claim 29, wherein the method is selected from the group consisting of sium. 31. 29. The method of claim 28, wherein the coating further comprises iron oxide. 32. 29. The method of claim 28, wherein the cupric ion source comprises copper hydroxide. 33. Claim 2 wherein the source of cupric ions is present in an amount from about 3 to about 30% by weight of the coating. 8. The method described in 8. 34. 29. The method of claim 28, wherein the matrix comprises an elastomer. 35. Claim 3 wherein the elastomer is present in an amount from about 10% to about 65% by weight of the coating. The method described in 4. 36. 34. The method of claim 33, wherein the matrix comprises an elastomer. 37. 29. The method according to claim 28, wherein the matrix comprises an elastomer and a filler. Law. 38. The matrix contains the elastomer and filler, and the cupric ion source is in the coating. The elastomer is present in an amount of about 3% to about 30% by weight, and the elastomer is present in an amount of about 10% to about 65% by weight of the coating. and the filler is present in an amount of about 20% to about 70% by weight of the coating. 28. The method described in 28. 39. Furthermore, it contains metallic micronutrients dispersed in the matrix, 39. The method of claim 38, wherein the nutrient is present in an amount of about 1% to about 8% of the coating. 40. 29. The method according to claim 28, wherein the plant is a vegetable. 41. 29. The method according to claim 28, wherein the plant is rice.