三峡库区消落带初期土壤养分特征

生态学杂志 ›› 2010, Vol. 29 ›› Issue (02): 281-289.

三峡库区消落带初期土壤养分特征

王晓荣;程瑞梅^**;肖文发;郭泉水;封晓辉

国家林业局森林生态环境重点实验室| 中国林业科学研究院森林生态环境与保护研究所| 北京 100091

出版日期:2010-02-10 发布日期:2010-02-10

Soil nutrient characteristics in juvenile waterlevelfluctuating zone of Three Gorges Reservoir.

WANG Xiao-rong, CHENG Rui-mei, XIAO Wen-fa, GUO Quan-shui, FENG Xiao-hui

Key Laboratory of Forest Ecology and Environment, State Forestry Administration of China|Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China

Online:2010-02-10 Published:2010-02-10

摘要/Abstract

摘要： 对三峡库区消落带回水区内2种主要植被类型土壤养分特征进行了研究。结果表明，除有效磷外，次生灌丛土壤养分含量均高于弃耕地，且其他养分指标变异系数在50%左右，而有效磷的变异系数达到91%。随海拔的升高，土壤养分未表现出明显差异性。与对照样带相比较，消落带内全磷、全钾、有效磷、速效钾含量增加，表明水淹和清库等人为活动对土壤母质风化影响严重，导致消落带内土壤磷和钾含量增高，而速效钾在水淹后则大量流失；随着土壤层次的加深，除了有效磷外，其他养分都表现出逐渐降低的趋势。消落带处于幼年时期，尚未形成明显的水分梯度，其养分和水分没有显著的相关性。

关键词: 23年定位试验, 石灰性土壤, 土壤有机质, 全磷, 速效磷

Abstract: Taking the soils of secondary shrubs and abandoned farmland in the juvenile water-level-fluctuating zone in Three Gorges Reservoir as test objects, this paper studied the characteristics of their nutrients. The nutrient contents except that of available phosphorous were higher in shrub soil than in abandoned farmland soil. The coefficient of variation of soil available phosphorus was 91%, while those of other nutrients were about 50%. No significant difference was observed in the nutrient contents with altitude change. The contents of soil total phosphorus, total potassium, available phosphorus, and available potassium in the backwater area of water-level-fluctuating zone increased rapidly, comp
ared to those in control zone. Soil nutrient contents except that of available phosphorous decreased with increasing soil depth. Due to the water back area was at its juvenile stage, no significant relationship was found between soil nutrients and soil moisture.

Key words: 23 years-located experiment, Calcareous soil, Organic matter, Total phosphorus, Available phosphorus

王晓荣;程瑞梅;肖文发;郭泉水;封晓辉. 三峡库区消落带初期土壤养分特征[J]. 生态学杂志, 2010, 29(02): 281-289.

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