摘要
以安庆沿江湿地不同历史利用方式(水耕和旱耕)和不同退耕还湖方式(自然水域且水产养殖-白荡湖和自然水域无水产养殖-菜子湖)的湿地土壤为研究对象,分析退耕还湖后土壤理化性质的变化。结果表明,退耕后白荡湖湿地土壤容重、粘粒含量和大多数养分含量均下降,而全磷含量有所增加;退耕后菜子湖湿地土壤粘粒含量和大多数养分含量均增加,而土壤容重和有效磷含量下降;历史水耕的菜子湖湿地土壤除有效磷含量外,土壤粘粒含量和大多数养分含量均显著高于历史旱耕湿地。退耕还湖为自然湿地相对于水产养殖更有利于湿地土壤生态恢复;相对于历史水耕土壤,历史旱耕湿地土壤生态恢复较为缓慢;土壤粘粒、有机质和全氮是评价湿地土壤生态恢复状况的良好指标。
Soils from wetlands adopting different historical farming tillage methods（hydroponics and dry farming） and different ways of returning farmland to lake（natural water area with aquaculture-Baidang lake and natural water area without aquaculture-Caizi lake） were sampled to analyze the changes of soil physical and chemical properties in Anqing Wetland along the Yangtze River.The results showed that soil bulk density,clay content,organic matter,total N,available N and available P decreased,while total P increased after returning farmland to lake（RFL） in Baidang lake;soil clay content,organic matter,total N,hydrolyzable N and total P increased,but soil bulk density and available P decreased after RFL in Caizi lake;soil clay content,organic matter,total P,total N and hydrolysable N under historical farming method of hydroponics were significantly higher than those under historical dry framing in Caizi lake wetlands;except total P and available P,soil clay and organic matter contents were significantly associated with soil nutrient content.These suggested that RFL as natural water area without aquaculture was better way for wetland restoration than that as natural water area with aquaculture;influence of historical farming methods of hydroponics on wetland soil was weaker than that of historical dry farming methods;soil clay,total N and organic matter contents were suitable indicators as soil quality change during wetland ecological restoration.
出处
《土壤通报》
CAS
CSCD
北大核心
2011年第6期1319-1323,共5页
Chinese Journal of Soil Science
基金
国家自然科学基金项目(41001369)
国家自然科学基金重点项目(40830528)
安徽省高校省级自然科学研究项目(KJ2008B264)资助
关键词
安庆湿地
退耕还湖
土壤生态恢复
土壤理化性质
Anqing wetland
Returning farmland to lake
Soil ecological restoration
Soil physical and chemical properties
