不同纬度红松天然林碳、氮、磷、钙化学计量特征研究

发布时间：2018-03-18 04:09

  本文选题：化学计量学特征　切入点：红松　出处：《沈阳农业大学》2017年硕士论文　论文类型：学位论文

【摘要】：本文以天然阔叶红松林中红松叶片及其土壤为研究对象,沿纬度梯度分别设置典型天然阔叶红松林样地、采集红松叶片和不同深度土层土壤,并分别测定了叶片和土壤的碳、氮、磷和钙的含量,同时采用单因素方差分析法和Pearson相关等分析法对其化学计量学特征进行分析,结果表明:(1)在不同纬度条件下,红松叶片碳、氮、磷、钙计量特征差异表现有所不同。其中,红松叶片全氮(14.42 mg/g)和全钙(3.25 mg/g)含量在各样点间差异显著,而有机碳(502.30 mg/g)、全磷(1.51 mg/g)含量及 C/N(34.52)、C/P(348.81)、N/P(9.91)差异不显著。(2)在不同纬度条件下,红松林各样点间土壤有机碳(42.32 mg/g)、全氮(3.25mg/g)、全磷(0.51mg/g)水溶性钙(0.05mg/g)含量及 C/N(12.58)、C/P(83.49)、N/P(6.47)均表现出显著差异,且不同土层间各计量特征均差异显著。(3)纬度因素对红松叶片碳、氮、磷、钙及碳氮磷计量比影响较小,均随纬度变化不显著。土壤中有机碳、全氮、全磷、水溶性钙含量及碳氮磷计量比随纬度的变化存在一定差异,其中各层土壤计量特征随纬度变化表现一致,土壤有机碳含量、C/N、C/P均与纬度呈极显著正相关关系,而土壤全氮、全磷、水溶性钙及N/P与纬度的相关关系不显著。(4)红松叶片碳、氮、磷、钙元素含量及碳氮磷计量比均显著高于土壤。叶片氮含量与上层土壤全氮含量及C/N显著相关,磷含量与土壤全磷、C/P、N/P显著相关;叶片C/P、N/P与土壤C/P、N/P均显著正相关,而C/P与土壤全磷呈显著负相关关系。叶片钙含量与土壤水溶性钙含量相关性不显著。土壤碳氮磷元素计量比对红松生长影响较大。(5)上层土壤与下层土壤有机碳、全氮、全磷及水溶性钙含量呈极显著正相关关系,且上层土壤各元素含量大于下层土壤,各元素随土壤深度增加均呈降低趋势。
[Abstract]:In this paper, the leaves of Pinus koraiensis and its soil in natural broad-leaved Korean pine forest were taken as the research object. The typical plots of natural broad-leaved Korean pine forest were set up along the latitude gradient, the leaves of Korean pine and the soil layers of different depth were collected, and the carbon of leaves and soil were determined respectively. The contents of nitrogen, phosphorus and calcium in leaves of Pinus koraiensis were analyzed by single factor variance analysis and Pearson correlation analysis. The results showed that under different latitudes, the leaves of Pinus koraiensis were treated with carbon, nitrogen and phosphorus. The differences in calcium metering characteristics were different, among which, the contents of total nitrogen (14.42 mg / g) and total calcium (3.25 mg / g) in leaves of Pinus koraiensis were significantly different from each other, while the organic carbon (502.30 mg / g), total phosphorus (1.51 mg / g) and C / N (34.52CP348.81% NPN / 9.91) had no significant difference at different latitudes. There were significant differences in soil organic carbon (42.32 mg / g), total nitrogen (3.25 mg / g), total phosphorus (0.51mg / g), water soluble calcium (0.05mg / g) and C / N ~ (12.58%) ~ (83.49N / P _ (6.47)) among different soil layers, and there were significant differences among different soil layers in the effects of different soil layers on carbon, nitrogen, phosphorus, and phosphorus content in leaves of Pinus koraiensis. The effects of soil organic carbon, total nitrogen, total phosphorus, water-soluble calcium content and ratio of carbon, nitrogen and phosphorus on the measurement ratio of calcium and carbon, nitrogen, phosphorus and carbon nitrogen and phosphorus were not significant with latitude, but there were some differences between the soil organic carbon, total nitrogen, total phosphorus, water soluble calcium and the ratio of carbon, nitrogen and phosphorus. The soil metering characteristics of each layer were consistent with latitude. The soil organic carbon content (C / N) C / P was significantly positively correlated with latitude, while soil total nitrogen, total phosphorus, water soluble calcium and N / P had no significant correlation with latitude (P / N), and there was no significant correlation between total nitrogen, total phosphorus, water soluble calcium and N / P in leaves of Pinus koraiensis var. koraiensis. The contents of P, Ca and C N P were significantly higher than those in soil, leaf nitrogen content was significantly correlated with soil total nitrogen content and C / N, P content was significantly correlated with soil total phosphorus C / P P / P, and leaf C / P N / P was positively correlated with soil C / P P / P. However, there was a negative correlation between C / P and soil total phosphorus. There was no significant correlation between leaf calcium content and soil water-soluble calcium content. The ratio of carbon, nitrogen and phosphorus had a significant effect on the growth of Pinus koraiensis. The contents of total phosphorus and water-soluble calcium were positively correlated, and the contents of elements in the upper soil were higher than those in the lower soil, and the contents of each element decreased with the increase of soil depth.
【学位授予单位】：沈阳农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S718.5
，

本文编号：1627910