1. Experiment BackgroundCurrently, in the egg-laying chicken breeding process, as the breed is improved and the laying cycle is extended (target at 100 weeks of age), the metabolic pressure of the egg-laying chickens reaches its limit. 25-hydroxyVitamin D3, as the active metabolite of vitamin D···

1. Experiment Background In modern intensive pig farming, sow reproductive performance is one of the core indicators determining the economic benefits of pig farms. The period around weaning is a critical regulatory stage for follicle development and oocyte maturation in sows, while the early g···

1. Experiment Background Vitamin D₃ is a key nutrient for maintaining poultry health and production performance. It needs to be converted into its active form in the liver and kidneys to exert physiological functions. However, this conversion process is easily affected by factors such as liver···

1. Experiment Background The lifetime productivity of sows is a core indicator determining the economic benefits of pig farms. The annual culling rate of sows in large-scale pig farms is approximately 40%-50%, among which reproductive disorders and limb-hoof problems are two key factors affecti···

Abstract This experiment aimed to explore the effects of dietary supplementation of LIQI99 on the production performance, intestinal health of laying hens, and the reduction of Salmonella contamination in eggs, and to determine its appropriate supplementation level and mechanism of action. A to···

The casting is prone to porosity defects1. The high mud content of the molding sand will lead to the decrease of the permeability of the molding sand, the increase of water, and the porosity defect of the casting is easy to appear. If the silica sand, bentonite and pulverized coal used in the f···

Zeolite powder is levigated from natural zeolite, color is light green, white. Can remove 95% of NH3 and Nitrogen in water, purify water quality, alleviate the phenomenon of turning water Chinese name: 沸石粉English name: Zeolite powderChemical formula: Na12[(AlO2)12(SiO2)12].27H···

Ⅰ、Blue absorption testⅡ、Inpection theoryAdd trial sample into Dilute solution of sodium pyrophosphate,Micro-boiling heat to disperse,then filter as indicator,Drop with methylene blue standard solution.Ⅲ、Reagents：3.1 Sodium pyrophosphate solution ρ(Na4P2O7·10H2O)＝10g／L: measured 10.00g Pyr···

Determination method of Feed montmorillonite Ammonium exchange capacity Theory：　 Heat sample with NH4CL solution, make NH4+ adsorbed completely by montmorillonite, because ions K+ and NH4+ are easy to be changed by montmorillonite, so wash sample by KCL solution, NH4+ is exchanged, NH4+(ka<···

Mycotoxin pollution has become a major hazard affecting the development of agriculture, feed industry and aquaculture in the world. How to understand and control mycotoxin has become the primary issue to solve feed safety and livestock product safety, and its importance and urgency should cause us t···