| 乔斌,何彤慧,吴春燕,苏芝屯.银川平原沟渠边坡土壤理化性状空间分异特征[J].干旱地区农业研究,2018,36(1):43~49 |
| 银川平原沟渠边坡土壤理化性状空间分异特征 |
| Spatial characteristics of soil physicochemical properties on ditch slope in the Yinchuan Plain |
| |
| DOI：10.7606/j.issn.1000-7601.2018.01.06 |
| 中文关键词: 沟渠边坡 植物群落 土壤理化性状 空间异质性 银川平原 |
| 英文关键词:ditch slope plant community soil physicochemical properties spatial heterogeneity Yinchuan plain |
| 基金项目:国家自然科学基金项目(41361095) |
|
| 摘要点击次数: 1275 |
| 全文下载次数: 543 |
| 中文摘要: |
| 基于银川平原沟渠边坡植物群落的生态序列更替，在沟渠边坡从堤坝顶部到坡底设置了A区、B区和C区3个样区，通过野外调查采样、实验室分析，结合经典统计学方法，对沟渠边坡土壤含水量、全盐、pH值、有机碳（SOC）、碱解氮（AN）、有效磷（AP）等的空间分布特征及其与植被的相互反馈机制进行了探究。结果表明：银川平原沟渠边坡土壤理化性状具有明显的空间异质性；A区、B区、C区的土壤含水量依次呈现递增变化规律；A区、B区、C区的pH值分别介于8.18～10.37、8.29～9.79、8.08～9.75之间，盐碱化程度较高；土壤全盐表聚效应显著，其中以B区0～10 cm土层富集效应最显著（P<0.05），形成了明显的“盐带”；SOC、AN、AP分别在B区的0～30、0～30、0～10 cm土层富集效应显著（P<0.05），形成了明显的“肥区”。土壤理化性状间的相互作用直接或间接地影响了土壤理化性状的空间差异，其中，土壤含水量的变化是植物群落更替效应的本源，进而影响了土壤理化性状。土壤资源的空间异质性和植物群落的生态序列梯度相伴而生、相互制约，共同维护着银川平原沟渠湿地的植物多样性和绿洲生态系统的稳定。 |
| 英文摘要: |
| The ditch is an important water conservancy establishment in Ningxia Yellow River Irrigation Region, with irrigation and drainage function as well as ecological functions. In this study, we set sample area A, B and C from the top to the bottom of the slope in the ditch slope. We carried on the preliminary exploration to the spatial distribution of the ditch slope soil water content, total salt, pH, soil organic carbon (SOC), available nitrogen(AN), available phosphorus(AP) and the mutual feedback mechanism and vegetation by field sampling and laboratory analysis, based on ecological sequence change of plant community on ditch slope, combined with classical statistical methods. The main conclusions are as follows: Indicators of soil physical and chemical properties of soil in Yinchuan plain on ditch slope has obvious spatial heterogeneity. Soil water content showed an increasing variation from sample area A to C. Soil pH of A, B,and C ranged between 8.18～10.37, 8.29～9.79 and 8.08～9.75, respectively, reflecting a high degree of salinity. Soil total salt was obviously accumulated on surface with 0～10 cm of sample area B showing a clear “salt zone”. SOC, AN and AP was mostly accumulated at 0～30, 0～30, 0～10 cm of sample area B. Interaction between the physical and chemical properties of soil directly or indirectly led to the spatial differences in soil characteristics. The change of soil water content resulted in the replacement effect of plant communities, affecting the physical and chemical properties of the soil. The spatial heterogeneity of soil resources and ecological gradient sequence of plant communities are interdependent, jointly maintaining the plant diversity and the stability of the oasis ecosystem of Yinchuan plain. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |