本文選題：化學計量學特征　切入點：紅松　出處：《沈陽農(nóng)業(yè)大學》2017年碩士論文　論文類型：學位論文

【摘要】：本文以天然闊葉紅松林中紅松葉片及其土壤為研究對象,沿緯度梯度分別設置典型天然闊葉紅松林樣地、采集紅松葉片和不同深度土層土壤,并分別測定了葉片和土壤的碳、氮、磷和鈣的含量,同時采用單因素方差分析法和Pearson相關等分析法對其化學計量學特征進行分析,結(jié)果表明:(1)在不同緯度條件下,紅松葉片碳、氮、磷、鈣計量特征差異表現(xiàn)有所不同。其中,紅松葉片全氮(14.42 mg/g)和全鈣(3.25 mg/g)含量在各樣點間差異顯著,而有機碳(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)差異不顯著。(2)在不同緯度條件下,紅松林各樣點間土壤有機碳(42.32 mg/g)、全氮(3.25mg/g)、全磷(0.51mg/g)水溶性鈣(0.05mg/g)含量及 C/N(12.58)、C/P(83.49)、N/P(6.47)均表現(xiàn)出顯著差異,且不同土層間各計量特征均差異顯著。(3)緯度因素對紅松葉片碳、氮、磷、鈣及碳氮磷計量比影響較小,均隨緯度變化不顯著。土壤中有機碳、全氮、全磷、水溶性鈣含量及碳氮磷計量比隨緯度的變化存在一定差異,其中各層土壤計量特征隨緯度變化表現(xiàn)一致,土壤有機碳含量、C/N、C/P均與緯度呈極顯著正相關關系,而土壤全氮、全磷、水溶性鈣及N/P與緯度的相關關系不顯著。(4)紅松葉片碳、氮、磷、鈣元素含量及碳氮磷計量比均顯著高于土壤。葉片氮含量與上層土壤全氮含量及C/N顯著相關,磷含量與土壤全磷、C/P、N/P顯著相關;葉片C/P、N/P與土壤C/P、N/P均顯著正相關,而C/P與土壤全磷呈顯著負相關關系。葉片鈣含量與土壤水溶性鈣含量相關性不顯著。土壤碳氮磷元素計量比對紅松生長影響較大。(5)上層土壤與下層土壤有機碳、全氮、全磷及水溶性鈣含量呈極顯著正相關關系,且上層土壤各元素含量大于下層土壤,各元素隨土壤深度增加均呈降低趨勢。
[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.
【學位授予單位】：沈陽農(nóng)業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：S718.5
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本文編號：1627910