摘要
2010年于辽河铁岭段构建河岸植被缓冲带,设置了杞柳、水蜡、紫穗槐、刺槐、草本和农田撂荒地6种植被带,对不同植被缓冲带下土壤的理化性质进行分析。结果表明:1)不同植被恢复模式下,辽河保护区内河岸带土壤pH值总体呈中性,刺槐地的土壤pH值最高,属于弱碱性土壤,农田地的土壤pH值最低,属于弱酸性土壤。杞柳、水蜡植被带土壤含水率、孔隙度、有机质、阳离子交换量、全氮和碱解氮以及全磷和速效磷相对较高,土壤容重较小;水蜡、刺槐植被带土壤全钾和速效钾相对较高;与其他几种植被恢复模式相比,草本地和农田地的土壤容重相对较大,且土壤养分指标基本偏低。2)土壤理化性质相关性分析显示,土壤容重与含水率和孔隙度呈极显著负相关;土壤含水率和孔隙度呈极显著正相关;土壤有机质与阳离子交换量、氮、磷等指标之间存在显著正相关关系。3)土壤质量综合得分结果表明,水蜡、杞柳植被带土壤质量相对较高;自然草本和农田撂荒地土壤质量较低,说明杞柳、水蜡灌木林对于提高河岸土壤肥力,改善土壤结构具有很好的作用。
The riparian vegetation buffer zone was constructed in Tieling section of Liaohe River in 2010. A total of six vegetation strips were set up, including osier, water wax, amorpha fruticosa, acacia, herbaceous, and abandoned farmland. Soil physicochemical properties of different vegetation buffer zones were analyzed. The results showed that: the soil pH of the riparian zone under different vegetation types in Liaohe River protected area was generally neutral. The highest soil pH of the acacia field belongs to weakly alkaline soil, while the lowest soil pH of the farmland belongs to weakly acidic soil. Soil water content, porosity, organic matter, cation exchange capacity, total nitrogen, alkaline nitrogen, total phosphorus, and available phosphorus were relatively high in the osier and water wax buffer zone, but the soil bulk density was low. Total and available potassium contents were relatively high in the water wax and acacia vegetation zones. Compared with several other vegetation types, the soil bulk density of herbaceous and agricultural land was relatively high, and the fundamental indicators of soil nutrients were low;the correlation analysis of soil physical and chemical properties showed that soil bulk density was very significantly negatively correlated with water content and porosity, and soil water content and porosity were very significantly positively-correlated. There was a significantly positive correlation between soil organic matter and cation exchange capacity, nitrogen, phosphorus and other indicators;the highest comprehensive soil quality score occurred in water wax and buffer zone. Whereas, the soil quality in the natural herbaceous and abandoned farmland was low. It indicated that osier forest and water wax forest had a good effect on improving the fertility of riparian soil and improving soil structure.
作者
张鸿龄
王斅誉
唐雪寒
ZHANG Hongling;WANG Xiaoyu;TANG Xuehan(Key Laboratory of Regional Environment and Eco-Remediation,Ministry of Education,Shenyang University,Shenyang 110044,China)
出处
《沈阳大学学报（自然科学版）》
CAS
2023年第1期16-25,共10页
Journal of Shenyang University：Natural Science
基金
国家科技重大专项(2018ZX07601-003-04)。
关键词
辽河保护区
植被恢复
河岸带
土壤理化性质
相关性分析
Liaohe River conservation area
vegetation restoration
riparian
soil physicochemical properties
correlation analysis
principal component analysis
