公开(公告)号：US20240180094A1

公开(公告)日：2024-06-06

申请号：US18282642

申请日：2022-02-25

Applicant: DENKA COMPANY LIMITED ,  TOHOKU UNIVERSITY

Inventor： Takashi OKAWA ,  Kazuma HONDA ,  Toju IINO ,  Kazuhisa KATO

IPC: A01H3/04 ,  A01H6/82

CPC classification number: A01H3/04 ,  A01H6/825

Abstract: Disclosed is an agent for increasing the expression of a stress response gene in a plant, the agent containing a humic acid.

公开(公告)号：US20230015862A1

公开(公告)日：2023-01-19

申请号：US17782552

申请日：2020-12-09

Applicant: DENKA COMPANY LIMITED

Inventor： Kazuma HONDA ,  Taiga SATO ,  Toshiharu ICHIJOH

IPC: C05F11/02 ,  C05G1/00 ,  C05G5/23 ,  C05D9/02

Abstract: A liquid humic acid extract that does not form precipitates when combined with a liquid fertilizer containing at least one of Mg, Fe, Zn and Mo and having an electric conductivity of 90 ms/cm or more. A liquid humic acid extract containing humic acid that has a mass-average molecular weight of 100 to 1,200, and having a total organic carbon concentration of 15,000 to 25,000 mg/L and a pH of 0.5 to 4.0. Preferably, the liquid humic acid extract contains a humic acid having a mass-average molecular weight of 100 to 1,200, and has a total organic carbon concentration of 15,000 to 25,000 mg/L and a pH of 0.5 to 4.0. A liquid humic acid extract that hardly forms precipitates and realizes an increase in the crop yield.

公开(公告)号：US20250115527A1

公开(公告)日：2025-04-10

申请号：US18729876

申请日：2022-11-01

Applicant: Denka Company Limited

Inventor： Takashi OKAWA ,  Kazuma HONDA ,  Toju IINO

IPC: C05F11/02 ,  C05G5/23

Abstract: A liquid humic substance of the present invention is a liquid humic substance having, in separating the liquid humic substance into a precipitated part and a soluble part by regulating the liquid humic substance to have a pH of 1 by adding hydrochloric acid, a total organic carbon concentration A mg/L of the precipitated part and a total organic carbon concentration B mg/L of the soluble part that provide a value of B/A×100 of 15 to 100, and the production method thereof includes (1) a step of adding 80 to 160 parts by mass of nitric acid on anhydrous basis to 100 parts by mass of low rank coal, (2) a step of reacting a mixture obtained in the step (1) under condition of 70 to 95° C. for 2 to 6 hours, so as to prepare a crude humic substance, (3) a step of adding water and an alkali to the crude humic substance to regulate the crude humic substance to have a pH of 6 to 10, (4) a step of adding water to make a solid-liquid ratio of 1/3 or more, (5) a step of extracting under condition of a liquid temperature of 40 to 95° C. for 0.5 to 24 hours, and (6) a step of subjecting a humic substance extracted liquid obtained in the step (5) to solid-liquid separation, so as to provide the liquid humic substance. The present invention can provide a liquid humic substance that has a growth promotion effect on crop plants.

公开(公告)号：US20230284626A1

公开(公告)日：2023-09-14

申请号：US17694101

申请日：2022-03-14

Applicant: Denka Company Limited

Inventor： Kazuma HONDA ,  Minoru MORIOKA ,  Gavin DIAZ

IPC: A01N59/16 ,  A01N43/90 ,  A01N25/04

CPC classification number: A01N59/16 ,  A01N43/90 ,  A01N25/04

Abstract: Disclosed is a method for cultivating a citrus plant comprising: applying to the citrus plants a liquid composition comprising Fe ions and humus acids, wherein at least a portion of the Fe ions are Fe2+ ions.

公开(公告)号：US20230284625A1

公开(公告)日：2023-09-14

申请号：US17694056

申请日：2022-03-14

Applicant: Denka Company Limited

Inventor： Kazuma HONDA ,  Minoru MORIOKA ,  Gavin DIAZ

IPC: A01N59/16 ,  A01N25/02

CPC classification number: A01N59/16 ,  A01N25/02

Abstract: Disclosed is a method for cultivating a citrus plant, comprising: applying to the citrus plant a liquid composition comprising Fe ions, wherein at least a portion of the Fe ions are Fe2+ ions, wherein the citrus plant is cultivated in sandy soil.