山东省德州地区盐生植物资源及其土壤含盐量分布调查
时间:2018-08-01 14:16 来源:毕业论文 作者:毕业论文 点击:次
| 摘要：土地盐碱化逐渐成为人类共同面对的一个全球性问题，山东德州地处黄泛平原，因自然原因土地盐碱化严重，本次调查以德州市下辖的11个县（市、区）为对象，所得该地区主要盐生植物共38种，分属16科36属，其中菊科植物占主要优势，共10属10种。对德州地区进行土壤盐分离子含量分析，发现主要以Na+、Cl-以及SO42-为主；总盐含量变异系数达107.09%，说明德州地区总盐分含量空间分布变化明显。对县（市、区）土壤总盐含量进行分析比对，按土壤盐渍化等级划分，盐土类型只有夏津县，宁津县、陵城区以及齐河县为非盐渍化土壤类型。结果显示，盐生植物多样性与土壤盐分含量基本相关，在一定程度上符合含盐量较高的县（市、区）其盐生植物多样性较低这一规律。26565 毕业论文关键词：山东德州；盐生植物；土壤盐分含量 Distribution of halophyte resources and soil salt content in Dezhou city of Shandong Province Abstract：Land salinization has become a global problem that mankind is facing together. Dezhou is located in the alluvial plain of the middle or lower reaches of the Yellow River. Due to natural causes, Dezhou has serious salinization of land. The survey was conducted in 11 counties (cities, districts) under the jurisdiction of Dezhou City. The result reflects that Dezhou mainly has 38 kinds of Halophyte, belong to 16 families and 36 genera., of which the Compositae family accounts for the main advantage. The analysis of soil salt content in the area of Dezhou shows that Na +, Cl- and SO42- are the main ions. The coefficient of variation of total salt content is 107.09%, indicating that the spatial distribution of total salt content in Texas is significantly changed. The soil salt content of the county (city and district) is analyzed and compared according to the degree of soil salinization. The types of saline soil are only Xiajin County. Ningjin County, Lingcheng District and Qihe County were non-salinized soil types. The results show that to a certain extent, the persity of halophytes is related to the content of soil salinity. There are less Halophytes in the county (city, district) which has higher salt content. Key words: Dezhou city of Shandong Province；Halophyte；soil salinity content 目录 摘要 1 关键词 1 Abstract 1 Key words 1 引言 1 1 材料与方法 2 1.1德州市区域概况 2 1.1.1地理位置及行政区划 2 1.1.2地形地貌 2 1.1.3气候条件 3 1.2研究内容和方法 3 1.2.1调查范围及采样点的选取 3 1.2.2植物样本的采集及鉴定 4 1.2.3土壤样本的采集及分析 4 1.3后期处理和数据分析 5 2 结果与分析 5 2.1德州盐生植物区系组成 5 2.1.1盐生植物物种数量组成 5 2.1.2科、属的组成统计 5 2.1.3主要科属物种分析 6 2.2德州盐生植物群落分布统计 6 2.2.1各县（市、区）盐生植物重要值统计 6 2.2.2各县（市、区）盐生植物物种数量分布统计 7 2.3土壤中各离子含量统计 8 2.3.1土壤中各离子的数据统计分析 8 2.3.2土壤中各离子的统计值特征 9 2.3.3土壤中各盐分离子的相关性 11 2.4各县（市、区）土壤总盐含量统计 11 2.5 德州地区盐生植物分布与土壤含盐量的比较 11 (责任编辑：qin) |