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作 者:塔娜[1,2] 那日苏[1,2] 王海[1,2] 拾涛[1,2]
机构地区:[1]中国农业科学院草原研究所,内蒙古呼和浩特010010 [2]农业部草原资源与生态重点开放实验室,内蒙古呼和浩特010010
出 处:《草业学报》2013年第5期37-43,共7页Acta Prataculturae Sinica
基 金:中央级公益性科研院所基本科研业务费专项资金(中国农业科学院草原研究所1610332012016);"十二五"国家科技支撑计划项目(2012BAD13B07)资助
摘 要:本研究选择内蒙古苏尼特右旗天然草场主要6个草场类,8个草场型,分析了0~30cm土壤营养元素(全N、P、K、Ca、Mg、S、Fe、Mn、Cu、Zn、B和Mo)有效态含量及与土壤有机质、pH值之间的相互关系。结果表明,1)研究区土壤pH(8.84±0.23),均为碱性土壤;土壤有机质含量与全N含量均较低,平均分别为(9.92±4.65)g/kg和(0.46±0.25)g/kg;营养元素有效态含量积累顺序为:河泛地、湖盆低地盐生草甸草场类>荒漠草原草场区"小针茅+无芒隐子草+葱属"植被型>沙丘植被草场类,河泛地、湖盆低地盐生草甸草场类土壤矿质元素有效态含量显著高于其他草场类。2)土壤富含K元素,B和Mo处于严重缺乏状态;除了河泛地、湖盆低地盐生草甸草场类以外草场类微量元素含量均处于轻度缺乏或缺乏状态。3)土壤pH与土壤N、P、Ca、Mn和Cu元素有效量存在显著负相关性关系;土壤有机质则与土壤N、P、Ca、S、Fe、Mn和Cu元素有效量存在极显著正相关性关系。The study of surface soil available nutrients (total N, P, K, Ca, Mg, S, Fe, Mn, Cu, Zn, B and Mo) contents and the correlations with soil organic matter and pH value was conducted in 8 styles among of 6 types of grassland from Suniteyou Banner. The results showed as follows, 1) The soils from study area belong to alkaline soil, pH was (8.84±0.23). The content of soil organic matter and total N was low, averaged in (9.92±4.65) g/kg and (0.46±0.25) g/kg respectively. The accumulation of soil available nutrients displayed an order as River pan and lake basin lowlands salt meadow pastureStipa klemenzii -[-Cleistogenes songorica +Alliurn" in desert steppe pasture^Dune vegetation pasture. The content of soil available nutrients in River pan and lake basin lowlands salt meadow pasture was significantly higher than those in other grassland types. 2) Soils were rich in K but lack of B and Mo seriously. Soil in different grassland types showed in lack of trace elements except of River pan and lake basin lowlands salt meadow pasture. 3) Soil pH value displayed signifi- cant negative correlation with available N, P, Ca, Mn and Cu. On the contrary, soil organic matter showed significant positive correlation with available N, P, Ca, S, Fe, Mn and Cu.
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