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测定了那曲地区尼玛县高寒草地不同月份围栏内和围栏外牧草矿物元素(Ca、P、Na、K、Mg、Cu和Zn)含量,并根据元素的吸收率及藏山羊矿物元素需要量,对放牧藏山羊采食牧草中矿物元素的盈缺进行了分析。结果表明:同月份围栏内与围栏外的矿物元素含量差异不显著(P>0.05),但不同季节的变异很大。夏秋季牧草Ca、P、Na、K、Mg、Cu、Zn的含量(Ca 1.25% DM,P0.1419% DM,Na0.06% DM,K 1.51% DM,Mg 0.28% DM,Cu 8.70mg/kg,Zn 27.35mg/kg)高于冬春季(Ca 0.72% DM,P 0.0005% DM,Na 0.02% DM,K0.43% DM,Mg 0.10% DM,Cu3.02mg/kg,Zn 8.49mg/kg)。除Mg和青草期的K能满足藏山羊的需要外,其余元素不能满足藏山羊生长、繁殖和泌乳对矿物元素的需要量。
The contents of mineral elements (Ca, P, Na, K, Mg, Cu and Zn) in forages and grasses in the fenced and fenced alpine meadow in Nima County, Naqu County, Nagqu Prefecture were determined. According to the element absorption rate and the mineral elements requirements of Tibetan goats, The stock deficit of mineral elements in grazing Tibetan goats was analyzed. The results showed that there was no significant difference in the contents of mineral elements between the fence and the fence in the same month (P> 0.05), but the variation in different seasons was very large. The contents of Ca, P, Na, K, Mg, Cu and Zn in summer and autumn grasses (Ca 1.25% DM, P0.1419% DM, Na 0.06% DM, K 1.51% DM, Mg 0.28% DM, Cu 8.70 mg / kg, Zn 27.35mg / kg) were higher than those in winter and spring (Ca 0.72% DM, P 0.0005% DM, Na 0.02% DM, K 0.43% DM, Mg 0.10% DM, Cu 3.02 mg / kg, Zn 8.49 mg / kg ). Except for Mg and grass K, which can meet the needs of Tibetan goats, the other elements can not meet the requirements of Tibetan goats for their growth, reproduction and lactation for mineral elements.