西乌珠穆沁旗放牧绵羊主要饲草料、土壤及水源营养状况调查研究

Investigation of the nutrition level of the main forage, soil and water source for pastured-fed sheep in West Ujimqin Banner

试验主要对西乌旗羊群的放牧草场牧草、储备草料、土壤和水源中的矿物质含量进行了调查分析,为进一步探讨西乌旗放牧绵羊发生营养性衰竭症主要原因提供理论基础。研究结果表明,西乌旗放牧地区土壤Ca、P、Cu和Se元素处于临界缺乏状态,Mg和K处于正常范围下限,其他元素含量水平适宜。西乌旗放牧地区饮水中13种矿物元素含量均符合动物饮用水标准。西乌旗天然草场和储备牧草处于低Cu、缺P和缺Se状态。西乌旗土壤中除了重金属元素Cd超标外,其他重金属元素均符合土壤环境质量标准。

The aim of this study was to investigate the mineral content of the grazing grass, reserved forage, soil and drinking water for sheep in West Ujimqin Banner, providing theoretical basis for further exploring the main reasons inducing dietetic exhaustion of pastured-fed sheep. Results showed that： the concentrations of calcium, phosphorus, copper and selenium in soil were critically deficient, magnesium and potassium under the normal level and the content of other mineral elements were appropriate. The contents of the thirteen mineral elements in water for sheep conformed to animal drinking water standard. The natural grass and reserved forage in West Ujimqin Banner were deficient in copper, phosphorus and selenium contents. In addition to cadmium out of limits, the other heavy metal element in soil were accord with the soil environmental quality standards.