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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.18.0622    [Accepted] Published online January 2, 2019.
Studies of phosphorus deficiency in the Qianbei-Pockmarked goat
Xiaoyun Shen1,2,3, Yongkuan Chi2, Bin Huo1, Kangning Xiong2,*
1School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
2State Engineering Technology Institute for Karst Desertification Control, Guizhou Normal University, Guiyang 550025, China
3World Bank Poverty Alleviation Project Office in Guizhou, Southwest China, Guiyang 550004, China
Correspondence:  Kangning Xiong, Tel: +86-17785132596, Fax: +86085187874662, Email: xiongkn@163.com
Received: 16 August 2018   • Revised: 26 September 2018   • Accepted: 4 December 2018
Abstract
Objective: Qianbei-Pockmarked goats are affected by a disorder locally referred to as ‘Ruanguzheng Disorder’, which is characterized by emaciation, lameness, muscular relaxation, stiffness of the extremities, and abnormal curvatures of the long bones. Our objective was to determine the relationship between the disorder and phosphorus deficiency.

Methods

Tissue samples were collected from affected and healthy animals, while soil and herbage samples were collected from affected and healthy pastures. Biochemical parameters were determined using an automatic biochemical analyzer (OLYMPUS AU 640, Olympus Optical Co., Japan). Mineral contents in soil, forage, and tissue were determined using a Perkin-Elmer AAS5000 atomic absorption spectrophotometer (Perkin-Elmer, Norwalk, Connecticut, USA).

Results

The results showed that phosphorus contents in herbages from affected pastures were markedly lower than those from healthy areas (P<0.01), and the ratio of calcium to phosphorus in the affected herbages was 12.93:1. The phosphorus contents of wool, blood, tooth, and bone from affected animals were also markedly lower than those from healthy animals (P<0.01). Serum phosphorus values in affected animals were much lower than those in healthy animals, while serum alkaline phosphatase values from affected animals were markedly higher than those from healthy animals (P<0.01). Inorganic phosphorus values from affected animals were approximately half of that in the control group. Supplementation of disodium hydrogen phosphate prevented and cured the disorder.
Conclusion
This study demonstrates that Ruanguzheng disorder in Qianbei-Pockmarked goats is primarily caused by phosphorus deficiencies in herbage due to fenced pastures and natural habitat fragmentation.
Keywords: Qianbei-Pockmarked Goats; Phosphorus Deficiency; Calcium; The Yunnan-Guizhou Plateau; The ‘Ruanguzheng Disorder’
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