Pelletized straw mulch and method of use thereof for soil stabilization and grass and wildflower seed enhancement

• US 6,829,860 B1
• Filed: 02/22/2000
• Issued: 12/14/2004
• Est. Priority Date: 02/22/2000
• Status: Expired due to Fees

• Current Assignee: Hydrostraw, LLC
• Original Assignee: Seeds, Inc., Summit Seed, Inc.
• Inventors: Lee, Edward, Peters, Terry
• Primary Examiner(s): Nguyen, Son T
• Application Number:
  US09/507,983
• Time in Patent Office: 1,757 Days
• Field of Search: 47/9, 47/576, 47/10.1 R
• US Class Current: 47/9
• CPC Class Codes: A01G 13/0262 Mulches, i.e. covering material not-pre-formed in mats or sheets A01G13/0281 takes precedence; composition of mulches C09K17/52
• CPC Class Codes: C09K 17/52 Mulches
• CPC Class Codes: Y02A 40/28 specially adapted for farming

Abstract

The present invention is for a mulch device for soil stabilization and grass and wildflower seed enhancement comprising pelletized straw mulch having high bulk density, straw fibers, and fertilizing qualities. The pelletized straw mulch is spread onto a surface to reduce soil erosion, to promote seed establishment, to promote water infiltration and retention, to promote soil stabilization and to enhance soil fertilization. Also disclosed is a novel method of using straw for soil stabilization and grass and wildflower seed enhancement.

Claims

1. A mulch device for soil stabilization and grass and wildflower seed enhancement comprising pelletized straw mulch having a bulk density of about 42 to 44 pounds per bushel, straw fibers, and fertilizing qualities, whereby the pelletized straw mulch is spread onto a surface to reduce soil erosion, to promote seed establishment, to promote water infiltration and retention, to promote soil stabilization and to enhance soil fertilization.

2. The mulch device of claim 1 wherein the pelletized straw mulch comprises pelletized straw mulch having a flat shape.

3. The mulch device of claim 1 wherein the pelletized straw mulch comprises pelletized straw mulch having a round shape.

4. The mulch device of claim 1 wherein the pelletized straw mulch comprises pelletized straw mulch having the following dimensions:

(a) a diameter of about {fraction (3/16)} inch to ½

inch; and

(b) a length of about {fraction (3/16)} inch to ¾

inch.

5. The mulch device of claim 1 wherein the pelletized straw mulch comprises a pelletized straw mulch matrix that forms upon absorption of water.

6. The mulch device of claim 5 wherein the pelletized straw mulch matrix comprises a pelletized straw mat, whereby the pelletized straw mat promotes more seed germination by further increasing water infiltration and retention on the surface.

7. The mulch device of claim 1 further comprising tackifiers impregnated in the pelletized straw mulch, the tackifiers chemically bonding the pelletized straw mulch onto the surface.

8. The mulch device of claim 7 wherein the tackifiers comprise synthetic tackifiers.

9. The mulch device of claim 8 wherein the synthetic tackifiers comprise linear polymers.

10. The mulch device of claim 9 wherein the linear polymers comprise linear copolymers.

11. The mulch device of claim 10 wherein the linear copolymers comprise polyacrylamides.

12. The mulch device of claim 11 Wherein the polyacrylamides comprise polyacrylamides having:

(a) negative charge density from about 2% to 50%; and

(a) a molecular weight from about 12 Milligrams/mole to 25 Milligrams/mole.

13. The mulch device of claim 12 wherein the polyacrylamides comprise polyacrylamides having:

(a) a negative charge density of about 18%; and

(b) a molecular weight from about 12 Milligrams/mole to 15 Milligrams/mole.

14. The mulch device of claim 12 wherein the polyacrylamides comprise polyacrylamides having:

(a) a negative charge density of about 30%; and

(b) a molecular weight from about 12 Milligrams/mole to 15 Milligrams/mole.

15. The mulch device of claim 12 wherein the polyacrylamides comprise polyacrylamides having:

(c) a negative charge density from about 45% to 50%; and

(d) a molecular weight from about 20 Milligrams/mole to 24 Milligrams/mole.

16. The mulch device of claim 7 wherein the tackifiers comprise organic tackifiers.

17. The mulch device of claim 16 wherein the organic tackifiers comprise vegetable-based adhesives.

18. The mulch device of claim 17 wherein the vegetable-based adhesives comprise vegetable-based adhesives derived from guar.

19. The mulch device of claim 17 herein the vegetable-based adhesives comprise vegetable-based adhesives derived from psyllium.

20. The mulch device of claim 1 further comprising additives impregnated in the pelletized straw mulch.

21. The mulch device of claim 20 herein the additives comprise organic fibers, the organic fibers mechanically bonding the pelletized straw mulch onto the surface and to each other.

22. The mulch device of claim 21 wherein the organic fibers comprise cotton by-products.

23. The mulch device of claim 20 wherein the additives comprise synthetic fibers, the synthetic fibers mechanically bonding the pelletized straw mulch onto the surface and to each other.

24. The mulch device of claim 20 wherein the additives comprise Bentonite, the Bentonite increasing the durability of the pelletized straw mulch.

25. The mulch device of claim 20 wherein the additives comprise fertilizers, the fertilizers adding to the fertilizing qualities of the pelletized straw mulch.

26. The mulch device of claim 20 wherein the additives comprise cross-linked polymers, the cross-linked polymers further promoting water retention in the pelletized straw mulch.

27. A method of using straw for soil stabilization and grass and wildflower seed enhancement, the straw having straw fibers and fertilizing qualities, comprising the steps of:

(a) hammermilling the straw, wherein the hammermilling step ruptures the straw fibers, decreases the size of the straw, reduces weed seeds and makes the straw water absorbent;

(b) pelletizing the straw after the hammermilling step to make pelletized straw mulch having a bulk density of about 42 to 44 pounds per bushel, the pelletizing step further eliminating the weed seeds in the straw;

(c) drying the pelletized straw mulch, wherein the drying step prevents mold formation in the pelletized straw mulch;

(d) spreading the pelletized straw mulch onto a surface; and

(e) watering the pelletized straw mulch, wherein the pelletized straw mulch absorbs the water, swells, and ruptures to form a mulch matrix,

whereby the pelletized straw mulch may be used to reduce soil erosion, to promote seed establishment, to promote water infiltration and retention, to promote soil stabilization and to enhance soil fertilization.

28. The method of using straw of claim 27 wherein the hammermilling step comprises step of hammermilling the straw to a length of about {fraction (3/16)} inch to ¾

inch.

29. The method of using straw of claim 27 wherein the pelletizing step comprises the step of pelletizing the straw fibers to the following dimensions:

(a) a diameter of about {fraction (3/16)} inch to ½

inch; and

(b) a length of about {fraction (3/16)} inch to ¾

inch.

30. The method of using straw of claim 27 wherein the drying step comprises the step of drying the pelletized straw mulch to comprise less than ten percent moisture by weight.

31. The method of using straw of claim 27 further comprising the step of firstly impregnating tackifiers into the straw fibers before the pelletizing step, whereby the tackifiers chemically bond the pelletized straw mulch onto the surface after forming the mulch matrix.

32. The method of using straw of claim 31 wherein the firstly impregnating step comprises the step of firstly impregnating synthetic tackifiers into the straw fibers before the pelletizing step.

33. The method of using straw of claim 32 wherein the firstly impregnating step comprises the step of firstly impregnating linear polymers into the straw fibers before the pelletizing step.

34. The method of using straw of claim 33 wherein the firstly impregnating step comprises the step of firstly impregnating linear copolymers into the straw fibers before the pelletizing step.

35. The method of using straw of claim 34 wherein the firstly impregnating step comprises the step of firstly impregnating polyacrylamides into the straw fibers before the pelletizing step.

36. The method of using straw of claim 35 wherein the firstly impregnating step comprises the step of firstly impregnating polyacrylamides into the straw fibers before the pelletizing step, the polyacrylamides having:

(a) a negative charge density from about 2% to 50%; and

(b) a molecular weight from about 12 Milligrams/mole to 25 Milligrams/mole.

37. The method of using straw of claim 36 wherein the firstly impregnating step comprises the step of firstly impregnating polyacrylamides into the straw fibers before the pelletizing step, the polyacrylamides having:

(a) a negative charge density of about 18%; and

(b) a molecular weight from about 12 Milligrams/mole to 15 Milligrams/mole.

38. The method of using straw of claim 36 wherein the firstly impregnating step comprises the step of firstly impregnating polyacrylamides into the straw fibers before the pelletizing step, the polyacrylamides having:

(a) a negative charge density of about 30%; and

(b) a molecular weight from about 12 Milligrams/mole to 15 Milligrams/mole.

39. The method of using straw of claim 36 wherein the firstly impregnating step comprises the step of firstly impregnating polyacrylamides into the straw fibers before the pelletizing step, the polyacrylamides having:

(a) a negative charge density from about 45% to 50%; and

(b) a molecular weight from about 20 Milligrams/mole to 24 Milligrams/mole.

40. The method of using straw of claim 31 herein the firstly impregnating step comprises the step of firstly impregnating organic tackifiers into the straw fibers before the pelletizing step.

41. The method of using straw of claim 40 wherein the firstly impregnating step comprises the step of firstly impregnating vegetable-based adhesives into the straw fibers before the pelletizing step.

42. The method of using straw of claim 41 herein the firstly impregnating vegetable-based adhesives step comprises the step of firstly impregnating vegetable-based adhesives derived from guar into the straw fibers before the pelletizing step.

43. The method of using straw of claim 41 wherein the firstly impregnating vegetable-based adhesives step comprises the step of firstly impregnating vegetable-based adhesives derived from psyllium into the straw fibers before the pelletizing step.

44. The method of using straw of claim 27 further comprising the step of secondly impregnating additives into the straw fibers before the pelletizing step.

45. The method of using straw of claim 44 wherein the secondly impregnating step comprises the step of secondly impregnating organic fibers into the straw fibers, whereby the organic fibers mechanically bond the pelletized straw mulch onto the surface after forming the mulch matrix.

46. The method of using straw of claim 45 wherein the secondly impregnating organic fibers step comprises the step of secondly impregnating cotton by-products into the straw fibers, whereby the cotton by-products mechanically bond the pelletized straw mulch onto the surface after forming the mulch matrix.

47. The method of using straw of claim 44 wherein the secondly impregnating step comprises the step of impregnating Bentonite into the straw fibers, the Bentonite increasing the durability of the pelletized straw mulch.

48. A The method of using straw of claim 44 wherein the secondly impregnating step comprises the step of secondly impregnating fertilizers into the straw fibers, the fertilizers adding to the fertilizing qualities of the pelletized straw mulch.

49. The method of using straw of claim 44 wherein the secondly impregnating step comprises the step of secondly impregnating cross-linked polymers into the straw fibers, the cross-linked polymers further promoting water retention in the pelletized straw mulch.