期刊论文

中文

农业现代化研究

1000-0275

2014

35

2

234-239

国家自然科学基金资助项目（编号：31170342） 国家国际科技合作专项资助项目（编号：2012DFB30030） 中国科学院知识创新工程重要方向性资助项目（编号：Kzcx2-Yw435） 国家林业局公益性行业专项（编号：201104065）.

本校为第一机构

近几十年来的杨树大面积种植引发了人们对洞庭湖湿地生态系统生态环境恶化的担忧。本研究以11龄与5龄杨树林为对象,以邻近的典型湿地植被南荻为对照,拟阐明杨树人工林对土壤理化性质的影响。结果表明,对土壤物理特性而言,杨树的种植加速了土壤水分的散失,对水分改变的趋势随林龄的增加而增大;杨树人工林改变了土壤粒径组成,致使粘粒与粉粒的降低、砂粒的增加,砂粒化趋势随林龄的增大而增强;对土壤化学特性而言,杨树人工林导致土壤中层(20-60 cm)电导率的降低,以及下层(60-100 cm)pH值的升高,对土壤全磷含量无明显影响,总体上降低了土壤全钾含量;引起土壤40-60 cm 全氮含量的降低,降低趋势随林龄...

In recent decades, large-scale poplar plantations have caused great concerns about their negative effects on ecological environments in the Dongting Lake wetlands. In this paper, five and eleven years of poplars were chose to study the effects of poplar plantation on soil physical and chemical characteristics in comparison with adjacent Miscanthus sacchariflorus, an indigenous vegetation of the Dongting Lake. For soil physical properties, soil water content was lowest in M. sacchariflorus and highest in 11-year poplars. Poplar plantation change...