Chang, Genzhu

Chen, Jishan

Miao, Xiaolin

Yang, Hongshan

Zhou, Xuehui

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Study on Seasonal Change of Cu in System of Soil‐Grass‐Livestock on the Meadow around Qinghai Lake Xuehui Zhou Chinese Academy of Agricultural Science, China Hongshan Yang Chinese Academy of Agricultural Science, China Genzhu Chang Chinese Academy of Agricultural Science, China Xiaolin Miao Chinese Academy of Agricultural Science, China Jishan Chen Chinese Academy of Agricultural Science, China Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/2-3/9 The 21st International Grassland Congress / 8th International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. 瞯 ]404　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　Grasslands/Rangelands Resources and Ecology ——— Soil Quality and Plant NutritionStudy on seasonal change of cu in system of soil‐grass‐livestock on the meadow around QinghaiLakeXuehui Zhou , Hongshan Y ang ,Genz hu Chang ,X iaolin M iao and Jishan ChenL anz hou Institute o f A nimal & Veterinary Pharmaceutics Sciences ,Chinese A cademy o f A gricultural Science , L anz hou730050 ; E‐mail :z houxuehui888＠ 163 .com .Key words : zone of Qinghai Lake , meadow pasture , system of soil‐grass‐livestock , Cu , seasonal changeIntroduction Seasonal change of Cu in the system of soil‐grass‐livestock ( sheep ) was studied on Meadow pasture around theQinghai Lake . The results will provide the basic data to accelerate seasonal animal husbandry , use reasonably grassland ,prevent Grassland degradation and increase the benefit of ecological animal production .Materials and methods The samples of Soil ,forage , serum in sheep and wool were collected in April , July and October ２００５ onMeadow around the Qinghai Lake , the samples were treated with traditional methods in the Lab . The objects were ten wethersin good condition . Content of Cu was determined in １８０‐８０ polarized Hitachi Zeeman atomic absorption spectrophotometer .The data were treated with SPSS１０ .０ software by single‐factor analysis of variance .Results and discussionTable 1 Change o f Cu in the system o f soil‐grass‐livestock in di f f erent seasons .Season Soil( mg / kg ) Pasture( mg / kg ) Serum(mg /L ) Pair ( mg / kg ) Intake (mg / d)Winter and spring ２０ 铑.９８ ± １ .２５A ６ 照.１１ ± １ .７９b １ 殚.３４ ± ０ .４５a １ �.９４ ± ０ .３５C ２ 2.６３ ± ０ .７６BSummer １９ 铑.３７ ± １ .９２B ８ 照.９１ ± ２ .０１Aa １ 殚.４５ ± ０ .６３a ４ �.７１ ± ０ .５４A １３ `.７６ ± ３ .１０AAutumn １４ 铑.６２ ± １ .５６C ３ 照.７７ ± ２ .１５Bc １ 殚.０９ ± ０ .２２a ３ �.７５ ± １ .１４B ３ 2.６０ ± ２ .０５BFrom above table , as to zone around Qinghai Lake , in winter and spring , summer and autumn , Cu content in the soil waswithin the range of chestnut soil in China , however , this a little lower than the average content of the soil in Qinghai (２１ mg /kg ) . Therefore , the content in this area was suitable .Cu is an essential element to the grow th of pasture and livestock . Guang‐hui Li ,etc thought that the content of Cu above ５ mg/ kg could maintain their normal grow th , below ３ ～ ５mg / kg would be shortage . In our study , Cu content in pasture wasnormal in the spring and summer , but shortage in autumn around the Qinghai Lake .Low Cu content could result in lack of Cu in an animal , and lead to many symptoms , such as Anemia , diarrhea , movementdisorders and wool bleaching . Zhongchao Zheng found that the Cu requirements for sheep was ７ ～ １１mg / kg , but our resultsindicated that Cu content in pasture was below ６ mg / kg in the spring and autumn , the content couldn摧t meet the needs of thebody .The normal value of the serum Cu in sheep was from ０ .７ ～ １ .３ mg /L . in our experiment , Cu level in serum of sheep washigher than the normal level in summer . The Cu level was in normal range in other seasons .The Cu density in wool of healthy sheep was ３ .６８ ± ０ .７４mg/ kg . in this experiment , the Cu density in wool in winter andspring was lower than that in healthy sheep , so , Cu was shortage . The causes may be long wither , about ７ months .Conclusion In the system of soil‐grass‐livestock around Qinghai Lake , The Cu content in the soil was suitable ; Cu content inpasture was normal in the spring and summer , but lack in autumn ; In the spring and autumn , daily intake for Cu couldn摧t meetthe needs of the body ; The serum level in sheep was higher than normal levels in the summer , while , in winter , spring andautumn , the level was normal . Cu in wool was shortage in winter and spring .ReferenceZongpin Liu .Study o f modern animal nutrition and metabolic diseases .[ M ] .Beijing : Chemical Industry Press , ２００３ .

Study on Seasonal Change of Cu in System of Soil‐Grass‐Livestock on the Meadow around Qinghai Lake

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Study on Seasonal Change of Cu in System of Soil‐Grass‐Livestock on the Meadow around Qinghai Lake

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