KR-20260065572-A - METHOD FOR ESTIMATING URINARY pH AND SLURRY pH IN PIGS ACCORDING TO ELECTROLYTE BALANCE IN THE DIET

Abstract

The present invention relates to a method for estimating the pH of pig urine and the pH of pig slurry according to the level of electrolyte balance in pig feed. According to the method, the pH of pig urine and the pH of pig slurry can be easily measured by measuring the electrolyte balance in pig feed, and this can be usefully applied in related industries.

Inventors

• 김법균
• 고유진

Assignees

• 건국대학교 산학협력단

Dates

Publication Date

20260508

Application Date

20251031

Priority Date

20241101

Claims (8)

1. A method for measuring the pH of pig urine, comprising the step of measuring the electrolyte balance (mEq/kg) in the feed.
2. A method for measuring the pH of pig urine according to claim 1, wherein the electrolyte balance in the feed is substituted into the following mathematical formula 1: [Mathematical Formula 1] .
3. A measuring unit for measuring electrolyte balance (mEq/kg) in feed; and A device for measuring the pH of pig urine comprising a calculation unit that calculates the pH of pig urine from the electrolyte balance in the feed.
4. A pH measuring device for pig urine according to paragraph 3, wherein the electrolyte balance in the feed is calculated by substituting into the following mathematical formula 1: [Mathematical Formula 1] .
5. A method for measuring the pH of a pig slurry, comprising the step of measuring the electrolyte balance (mEq/kg) in the feed.
6. A method for measuring the pH of a pig slurry according to claim 5, wherein the electrolyte balance in the feed is substituted into the following mathematical formula 2: [Mathematical Formula 2] .
7. A measuring unit for measuring electrolyte balance (mEq/kg) in feed; and A pH measuring device for pig slurry comprising a calculation unit that calculates the pH of the pig slurry from the electrolyte balance in the feed.
8. A pH measuring device for pig slurry according to claim 7, wherein the electrolyte balance in the feed is calculated by substituting into the following mathematical formula 2: [Mathematical Formula 2] .

Description

Method for Estimating Urinary pH and Slurry pH in Pigs According to Electrolyte Balance in Diet The present invention relates to a method for estimating the urine pH and slurry pH of pigs according to the electrolyte balance level in pig feed. Ammonia and odor-causing substances generated from pig manure have an adverse effect on air quality and climate change, and can cause respiratory diseases and a decline in livestock productivity. These ammonia and odor-causing substances are produced during the manure storage process through microbial fermentation and the action of ureases. Manure generated in the pig farming industry is known to account for the largest share, at 39.4%, of total greenhouse gas emissions from the livestock manure treatment sector as of 2021 (National Greenhouse Gas Inventory Report, 2023). Ammonia is primarily produced by the decomposition of urea present in pig urine or by the fermentation of undigested nitrogen compounds. Various studies have been conducted to reduce this ammonia release, one of which involves lowering the pH of pig urine to 5.12 or lower to reduce the activity of urease and inhibit ammonia production (Kim et al., 2020). This can be achieved by lowering the pH of manure by reducing urine pH through a decrease in electrolyte balance within the feed. However, there is a lack of research regarding the optimal level of electrolyte balance within the feed for reducing pig manure pH and the changes in pig urine pH according to electrolyte balance. Accordingly, the inventors completed the present invention by developing an estimation formula for the pH of pig urine and slurry using the level of electrolyte balance in the feed through research on changes in the pH of pig manure according to the electrolyte balance in pig feed. Figure 1 shows the results of a one-slope broken-line analysis of urine pH in pigs according to electrolyte balance in the feed. Figure 2 shows the results of a one-slope broken-line analysis of the pH of pig slurry according to the electrolyte balance in the feed. Hereinafter, embodiments and examples of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in various forms and is not limited to the embodiments and examples described herein. Throughout this specification, when a part is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. The present invention provides a method for measuring the pH of pig urine, comprising the step of measuring the electrolyte balance (mEq/kg) in the feed. The electrolyte balance in the above feed may be substituted into the following mathematical formula 1. [Mathematical Formula 1] Pig urine pH = 8.30 + 0.011 Х (Electrolyte balance in feed (mEq/kg) - 35.47) ( r² = 0.94 and P = 0.014) In addition, the present invention provides a device for measuring the pH of pig urine, comprising: a measuring unit for measuring an electrolyte balance (mEq/kg) in the feed; and a calculation unit for calculating the pH of pig urine from the electrolyte balance in the feed. The electrolyte balance in the above feed may be calculated by substituting it into the above mathematical formula 1. In addition, the present invention provides a method for measuring the pH of a pig slurry, comprising the step of measuring the electrolyte balance (mEq/kg) in the feed. The electrolyte balance in the above feed may be substituted into the following mathematical formula 2. [Mathematical Formula 2] Pig slurry pH = 7.339 + 0.003 Х Electrolyte balance in feed (mEq/kg) ( r² = 0.86 and P = 0.008). In addition, the present invention provides a pH measuring device for pig slurry comprising: a measuring unit for measuring an electrolyte balance (mEq/kg) in the feed; and a calculation unit for calculating the pH of the pig slurry from the electrolyte balance in the feed. The electrolyte balance in the above feed may be calculated by substituting it into the above mathematical formula 2. The term “feed” in the present invention refers to material(s) that are consumed by animals and contribute energy and/or nutrients to the animals’ diet. Examples of feed include, but are not limited to, total mixed feed (TMR), fodder(s), pellet(s), concentrate(s), premix(s), byproduct(s), grain(s), distiller grain(s), molasses, cellulose(s), fodder(s), grass(s), hay, kernel(s), leaves, meal, soluble material(s), and supplement(s). The pig feed of the present invention may comprise one or more selected from the group consisting of rice, corn, soybean hulls, wheat, wheat bran, palm kernel meal, wheat distiller's dried grains (DDGS), copra meal, cashew nut, rapeseed meal, and soybean meal, but is not limited thereto. In the present invention, the "%" used to indicate the concentration of a specific s