本文選題：油松　切入點(diǎn)：樟子松人工林　出處：《沈陽(yáng)農(nóng)業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：以遼寧地區(qū)油松(Pinus tabulaeformis 和樟子松(Pinus sylvestris var.mongolicaa)人工林為研究對(duì)象,研究?jī)蓸?shù)種土壤養(yǎng)分分布特征及與林木生長(zhǎng)間的關(guān)系,以期為該地區(qū)以油松和樟子松為建群種的林下土壤肥力維護(hù)和林木管理提供理論指導(dǎo)。研究地點(diǎn)選取遼西(建平和阜新)和遼東(桓仁、清原和本溪)主要研究區(qū)域,按照不同坡位(坡上、坡中、坡下)、坡向(陰坡和陽(yáng)坡)和土層厚度(0～15cm和15～30cm)采集土壤樣本。測(cè)定土壤有機(jī)C、Ca、全N、全P、速效N和速效P,測(cè)定林木樹(shù)高、胸徑、冠幅,計(jì)算得到高徑比。主要研究結(jié)果如下:(1)遼西地區(qū)油松和樟子松人工林不同坡位、坡向及土層的土壤養(yǎng)分分布差異顯著。油松和樟子松人工林各土層的土壤有機(jī)C、Ca、全N、全P、速效N和速效P均呈現(xiàn)出:坡下坡中坡上,陰坡半陰坡半陽(yáng)坡陽(yáng)坡。同時(shí),油松和樟子松人工林各坡位的上層土壤養(yǎng)分含量均高于下層。(2)遼東地區(qū)油松和樟子松人工林不同坡位、坡向及土層的土壤養(yǎng)分分布差異顯著,各土層的土壤有機(jī)C、Ca、全N、全P、速效N和速效P均呈現(xiàn)出:坡下坡中坡上,陰坡半陰坡半陽(yáng)坡陽(yáng)坡。同時(shí),各坡位的上層土壤養(yǎng)分含量均高于下層。(3)遼西地區(qū)油松和樟子松人工林土壤養(yǎng)分與林木生長(zhǎng)之間的關(guān)系表現(xiàn)為,坡下的土壤養(yǎng)分間相關(guān)系數(shù)較坡中和坡上高,陰坡的土壤養(yǎng)分間相關(guān)系數(shù)較陽(yáng)坡高。其中,油松人工林坡下、陰坡土壤有機(jī)C、全N、全P、速效N和速效P之間呈顯著正相關(guān)(p0.05),說(shuō)明油松人工林坡下、陰坡土壤養(yǎng)分之間聯(lián)系較為緊密;坡下、陰坡土壤有機(jī)C、全N、全P、速效N和速效P與胸徑、樹(shù)高之間呈顯著正相關(guān)關(guān)系(p0.05),說(shuō)明遼西地區(qū)坡下、陰坡土壤養(yǎng)分對(duì)油松生長(zhǎng)具有明顯的促進(jìn)作用,且坡下相關(guān)系數(shù)較坡中和坡上高,陰坡相關(guān)系數(shù)較陽(yáng)坡高。樟子松人工林土壤養(yǎng)分與林木生長(zhǎng)性狀方面的關(guān)系表現(xiàn)與油松人工林相同,并且坡下、陰坡土壤有機(jī)C、Ca、全P、速效N、速效P、胸徑和樹(shù)高之間呈顯著正相關(guān)關(guān)系(p0.05)。(4)遼東地區(qū)油松和樟子松人工林土壤養(yǎng)分與林木生長(zhǎng)之間的關(guān)系與遼西分析結(jié)果基本一致。即坡下、陰坡的土壤養(yǎng)分間相關(guān)系數(shù),以及土壤養(yǎng)分與林木生長(zhǎng)性狀間的相關(guān)系數(shù)較高。其中,油松人工林坡下、陰坡土壤有機(jī)C、全N、全P、速效N和速效P之間呈顯著正相關(guān)(p0.05);坡下、陰坡土壤有機(jī)C、全N、全P、速效N和速效P與胸徑、樹(shù)高之間呈顯著正相關(guān)關(guān)系(p0.05)。樟子松人工林坡下、陰坡土壤有機(jī)C、Ca、全P、速效N、速效P、胸徑和樹(shù)高之間呈顯著正相關(guān)關(guān)系(p0.05)。
[Abstract]:The soil nutrient distribution characteristics of Pinus tabulaeformis and Pinus sylvestris var. mongolica a plantation in Liaoning province were studied and the relationship between soil nutrient distribution and tree growth was studied. In order to provide theoretical guidance for soil fertility maintenance and forest management of Pinus tabulaeformis and Pinus sylvestris var. mongolica in this area, the main research areas of west Liaoning (Jianping and Fuxin) and Liaodong (Huanren, Qingyuan and Benxi) were selected. Soil samples were collected according to different slope positions (on slope, middle slope, downhill slope, slope direction (shady slope and sunny slope) and thickness of soil layer (0 ~ 15 cm and 15 ~ (30 cm)). Soil organic C (C) Ca, total N, total P, available N and available P were measured. Tree height, DBH, crown width were measured. The main results are as follows: 1) different slope positions of Pinus tabulaeformis and Pinus sylvestris plantation in western Liaoning. There were significant differences in soil nutrient distribution between slope and soil layer. Organic C _ (C) Ca, total N, total P, available N and available P in different soil layers of Pinus tabulaeformis and Pinus sylvestris plantation showed: middle slope of downslope, half shady slope and half sunny slope of shady slope. The upper soil nutrient content of Pinus tabulaeformis and Pinus sylvestris var. mongolica plantation was higher than that of the lower layer of Pinus tabulaeformis and Pinus sylvestris var. mongolica plantation. Soil organic C _ (C) Ca, total N, total P, available N and available P in all soil layers show: middle slope of downhill slope, half shady slope, half sunny slope. At the same time, The relationship between soil nutrients and forest growth of Pinus tabulaeformis and Pinus sylvestris var. mongolica plantation in western Liaoning Province was as follows: the correlation coefficient between soil nutrients under slope was higher than that in middle slope. The correlation coefficient between soil nutrients in shady slope was higher than that in sunny slope. There was a significant positive correlation between soil organic C, total N, total P, available N and available P under the slope of Pinus tabulaeformis plantation, indicating that there was a significant positive correlation between soil organic C, total N, total P and available P under the slope of Pinus tabulaeformis plantation. Under the slope, organic C, total N, total P, available N and available P were positively correlated with DBH and tree height, indicating that there was a significant positive correlation between soil organic C, total N, total P, available P and DBH, tree height under slope in western Liaoning Province. Soil nutrients in shady slope had obvious promoting effect on the growth of Pinus tabulaeformis, and the correlation coefficient under slope was higher than that on slope and middle slope. The correlation coefficient of shady slope was higher than that of sunny slope. The relationship between soil nutrients and forest growth of Pinus tabulaeformis and Pinus sylvestris var. mongolica plantation in eastern Liaoning Province was basically consistent with the results of analysis in western Liaoning Province, that is, under the slope, there was a significant positive correlation between soil nutrients and forest growth in soils of Pinus tabulaeformis and Pinus sylvestris var. mongolica. The correlation coefficient between soil nutrients and forest growth characters was higher in shady slope, and there was a significant positive correlation between soil organic C, total N, total P, available N and available P under the slope of Pinus tabulaeformis plantation. Soil organic C, total N, total P, available N and available P were positively correlated with DBH and tree height in shady slope. There was a significant positive correlation between soil organic C _ (1) Ca, total P, available N, available P, DBH and tree height under slope of Pinus sylvestris var. mongolica plantation.
【學(xué)位授予單位】：沈陽(yáng)農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：S714.8
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本文編號(hào)：1636732