| 西藏米拉山区土壤主要养分元素垂直分布特征 |
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| 引用本文： | 钟国辉,钟政昌,田发益,陈芝兰,杨爽.西藏米拉山区土壤主要养分元素垂直分布特征[J].山地学报,2007,25(1):108-113. |
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| 作者姓名： | 钟国辉 钟政昌 田发益 陈芝兰 杨爽 |
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| 作者单位： | 西藏农牧学院生物技术中心,西藏,林芝,860000 |
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| 基金项目： | 国家科技攻关项目;中国森林生态网络体系‘线'的研究与示范"资助项目 |
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| 摘 要： | 研究了米拉山区域土壤常规营养变化情况。该区域位于冈底斯山脉东段,巨大的高差、复杂多样的地势结构与地貌作用过程,以及极为复杂多样的气候类型、植被分布等,决定了本区域土壤形成过程的多样化和鲜明的垂直地带性分异特点。按垂直高程变化每100m设一采样点采集各剖面层土样样品,分析其常规营养组成。结果显示:米拉山东坡土壤显弱酸性,西坡土壤从米拉山口至拉萨由弱酸性递变至弱碱性;有机质从林芝八一镇至米拉山口而至拉萨市呈现递减规律变化,而且随剖面深度增加而降低;土壤全氮东坡A层高于西坡,B、C两层变化不明显,速效态氮东西坡剖面层次性变化分明,从八一镇至米拉山口递增,从米拉山口至拉萨递减;全磷含量A层高于B、C层,东坡剖面层次性变化较西坡显著,有效磷从八一镇至米拉山口递减,从米拉山口至拉萨递增;研究区土壤中钾素含量变化不明显。
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| 关 键 词： | 土壤 主要养分 垂直分布 米拉山区 西藏 |
| 文章编号： | 1008-2786-（2007）1-108-06 |
| 收稿时间： | 2006-04-10 |
| 修稿时间： | 2006-10-09 |
Vertical Distributional Character of Main Nutritional Composition in Soil in Mila Mountains Area, Tibet |
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| ZHONG Guohui,ZHONG Zhengchang,TIAN Fayi,CHEN Zhilan,YANG Shuang.Vertical Distributional Character of Main Nutritional Composition in Soil in Mila Mountains Area, Tibet[J].Journal of Mountain Research,2007,25(1):108-113. |
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| Authors: | ZHONG Guohui ZHONG Zhengchang TIAN Fayi CHEN Zhilan YANG Shuang |
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| Institution: | Bio-Technology Center, Tibet Agricultural and Animal Husbandry College,Linzhi, Tibet 860000, China |
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| Abstract: | This paper studies the variety of soil routine nutritional composition in Mila mountains area from Bayi town in the east at an altitude of 2 970 m through the peak of Mila mountains at an altitude of 5 200 m to Lhasa city at an altitude of 3 700 m.It is in the east part of Gangdisi mountains.The diversification and vivid vertical different zone features of the soil formation are decided by the large altitudinal differences,complicated and various physical structure,landform action course and extremely complex climate types and vegetation distribution.The samples of the soil of each section were collected according to vertical height changes of 100 m.Its routine nutritional elements were analyzed.The result shows that the soil in the east slope of Mila mountains contains weak acidity while the soil in the west slope from Mila mountains to Lhasa city contains weak acidity to weak alkalescence by degrees.The organic substance decreases by degrees from Bayi town,the peak of Mila mountains to Lhasa city while decreases with the increase of section depth.The soil of east slope contains total nitrogen more than that of west slope in the A layer.The total nitrogen in B layer and C layer doesn't vary clearly.The plant available nitrogen of the layer between the east slope and the west slope changes clearly:it increases from Bayi town to the peak of Mila mountains and decreases from the peak of Mila mountains to Lhasa city by degrees.The A layer contains total phosphorus more than B layer and C layer,it varies more clearly in the east slope than in the west slope among the three layers.The plant available phosphorus decreases from Bayi town to the peak of Mila mountains while increases from the peak of Mila mountains to Lhasa city by degrees.Kalium in the soil doesn't vary clearly. |
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| Keywords: | soil main nutrition vertical distributional Mila mountains area Tibet |
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