土默川平原盐生植物及土壤碳氮特征调查研究

发布时间：2018-04-15 08:05

本文选题：土默川平原 + 盐生植物　；参考：《内蒙古农业大学》2015年硕士论文

【摘要】：本论文以土默川平原9个不同地点选取的不用盐生植物及土壤为研究对象,运用生态学和土壤学基本原理,采用经典统计学分析方法,对其碳、氮特征开展了研究分析,结果如下：1.土默川平原不同类型盐生植物碳与土壤碳特征分析：本次调查研究共涉及22种不同盐生植物,其地上部分有机含碳率最大的是獐茅,为58.4%,最小的是盐地碱蓬,为23.4%；盐生植物种群生物量与种群碳储量呈线性正相关关系(P0.05),相关系数R2=0.99,线性回归方程为：y=0.419x-6.940；盐生植物种群碳储量与0—20cm土层碳密度和20-40cm土层碳密度均呈线性正相关关系(P0.05),相关系数分别为R2=0.80和R2=0.87,线性回归方程分别为y=4.049x+15207和y=2.53x+12879。2.土默川平原不同类型盐生植物氮与土壤氮特征分析：植物地上部分含氮率最大的是羊草,为5.40%,最小的是蒲公英,为2.70%；盐生植物种群生物量与种群氮储量呈线性正相关关系(P0.05),相关系数R2=0.98,线性回归方程为y=0.051x-10.05；盐生植物种群氮储量与0-20cm土层氮密度和20-40cm土层氮密度均呈线性正相关关系(P0.05),相关系数分别为R2=0.83和R2=0.51,线性回归方程分别为y=4.312x+1492和y=2.956x+1232。3.土默川平原不同盐生植物碳氮比与土壤碳氮比特征分析：植物地上部分碳氮比最大的是假苇拂子茅,为15.6,最小的是羊草,为8.3；盐生植物种群碳氮比与0-20cm土层碳氮比和20-40cm土层碳氮比均无显著相关性(P0.05)。
[Abstract]:In this paper, the halophyte plants and soil selected from 9 different sites in the Tumechuan Plain were used as the research objects. The characteristics of carbon and nitrogen were studied by using the basic principles of ecology and soil science and the classical statistical analysis method.The result is as follows: 1.Analysis of carbon and soil carbon characteristics of different types of halophytes in Tamagawa Plain: this investigation involved 22 different halophytes. The highest organic carbon content in the aboveground part of the plant was water roe, which was 58.4%, and the smallest was Suaeda salsa.There is a linear positive correlation between halophyte population biomass and population carbon storage (P 0.05), correlation coefficient R _ 2O _ (0.99), linear regression equation is:: y ~ (0.19) -6.940. Halophyte population carbon storage is linear positive phase with 0-20cm soil layer carbon density and 20-40cm soil layer carbon density.The correlation coefficient is R _ (2) O _ (0. 80) and R _ (2) O _ (0.87), respectively. The linear regression equations are Y ~ (2 +) 4.049x 15207 and Y ~ (2.53 x) 12879.2, respectively.Analysis of nitrogen and soil nitrogen characteristics of different types of halophytes in Tumechuan Plain: the highest nitrogen content in the aboveground part of plants was Leymus chinensis (5.40%), and the smallest was dandelion.There is a linear positive correlation between the biomass of halophyte population and the nitrogen reserves of the population, the correlation coefficient is R2N 0.98, and the linear regression equation is yong 0.051x-10.05. There is a linear positive correlation between the nitrogen reserve of halophyte population and 0-20cm soil layer nitrogen density and 20-40cm soil layer nitrogen density.The correlation coefficient is R _ (2) O _ (0. 83) and R _ (2) O _ (0.51), and the linear regression equations are y ~ (2) 4.312x 1492 and Y ~ (2.956 x) 1232.3respectively.Analysis of C / N ratio of different halophytes and soil C / N ratio in Tamagawa Plain: the highest C / N ratio in the aboveground part of plants was the pseudoReed fescue (15.6), and the smallest was Leymus chinensis (Leymus chinensis).There was no significant correlation between C / N ratio of halophyte population and 0-20cm soil layer and 20-40cm soil layer C / N ratio.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：Q948;S153.6

【参考文献】