Method of reducing nitrate content in a plant

Patent metadata

Field	Value
Publication number	US-10015935-B2
Application number	US-201514732380-A
Country	US
Kind code	B2
Filing date	Jun 5, 2015
Priority date	Feb 24, 2015
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

The present invention provides a method of reducing nitrate content in a plant by supplementing Rhodopseudomonas palustris DSM 29314 with a hydroponic nutrient solution, wherein the plant can grow in the hydroponic nutrient solution. The bacteria can effectively reduce 50% to 88% of the nitrate content in the plant, and only requires half concentration of the hydroponic nutrient solution than usual to enhance the fresh and dry weight of the plant up to 17% to 44%. It can effectively reduce cost, increase income and provide safe crops.

First claim

What is claimed is:

1. A method of reducing nitrate content in a plant comprising:
supplementing Rhodopseudomonas palustris DSM 29314 into a hydroponic nutrient solution to a concentration of at least 10,000 colony forming units (CFU) per milliliter; and thereafter
hydroponically growing said plant in the hydroponic nutrient solution.

2. The method according to claim 1 , wherein said plant is grown in a plant factory.

3. The method according to claim 1 , further comprising supplementing additional Rhodopseudomonas palustris DSM 29314 to reach a million CFU per milliliter in said hydroponic nutrient solution after a period time.

4. The method according to claim 3 , wherein the period time is at least 7 days.

5. The method according to claim 1 , wherein a pH value of the hydroponic nutrient solution is 6.0 to 7.0.

6. The method according to claim 1 , further comprising a step of diluting the hydroponic nutrient solution by half prior to said supplementing step.

7. The method according to claim 1 , wherein the nitrate content in the plant is reduced in the range of 50% to 88%.

8. The method according to claim 1 , wherein a fresh and dry weight of the plant is enhanced in the range of 17% to 44%.

9. The method according to claim 1 , wherein the plant is Maruba Santoh, Cuiyu, Brassica rapa var. chinensis crinkle garden lettuce, or Lactuca sativa var. crispa.

10. The method according to claim 1 , wherein said plant is Maruba Santoh.

11. The method according to claim 1 , wherein said plant is Cuiyu.

12. The method according to claim 1 , wherein said plant is crinkle garden lettuce.

13. The method according to claim 1 , wherein said plant is Brassica rapa var. chinensis.

14. The method according to claim 1 , wherein said plant is Lactuca sativa var. crispa.

15. The method according to claim 1 , wherein said hydroponic nutrient solution has an electrical conductivity of 1.8 mS/cm.

16. The method according to claim 6 , wherein said hydroponic nutrient solution has an electrical conductivity of 1.2 mS/cm after said diluting step.

Assignees

• Univ Nat Taiwan

Inventors

• Liu Chi-Te
• Lur Huu-Sheng
• Lo Kai-Jiun
• Hsu Shu-Hua

Classifications

• A01G7/00

  Botany in general · CPC title

• A01G22/00 Primary

  Cultivation of specific crops or plants not otherwise provided for · CPC title

• A01G31/00

  Soilless cultivation, e.g. hydroponics (growth substrates therefor A01G24/00; cultivation of seaweed A01G33/00) · CPC title

• A01G22/15 Primary

  Leaf crops, e.g. lettuce or spinach · CPC title