油松、樟子松人工林土壤养分与生长的关系研究

发布时间：2018-03-20 00:30

  本文选题：油松　切入点：樟子松人工林　出处：《沈阳农业大学》2017年硕士论文　论文类型：学位论文

【摘要】：以辽宁地区油松(Pinus tabulaeformis 和樟子松(Pinus sylvestris var.mongolicaa)人工林为研究对象,研究两树种土壤养分分布特征及与林木生长间的关系,以期为该地区以油松和樟子松为建群种的林下土壤肥力维护和林木管理提供理论指导。研究地点选取辽西(建平和阜新)和辽东(桓仁、清原和本溪)主要研究区域,按照不同坡位(坡上、坡中、坡下)、坡向(阴坡和阳坡)和土层厚度(0～15cm和15～30cm)采集土壤样本。测定土壤有机C、Ca、全N、全P、速效N和速效P,测定林木树高、胸径、冠幅,计算得到高径比。主要研究结果如下:(1)辽西地区油松和樟子松人工林不同坡位、坡向及土层的土壤养分分布差异显著。油松和樟子松人工林各土层的土壤有机C、Ca、全N、全P、速效N和速效P均呈现出:坡下坡中坡上,阴坡半阴坡半阳坡阳坡。同时,油松和樟子松人工林各坡位的上层土壤养分含量均高于下层。(2)辽东地区油松和樟子松人工林不同坡位、坡向及土层的土壤养分分布差异显著,各土层的土壤有机C、Ca、全N、全P、速效N和速效P均呈现出:坡下坡中坡上,阴坡半阴坡半阳坡阳坡。同时,各坡位的上层土壤养分含量均高于下层。(3)辽西地区油松和樟子松人工林土壤养分与林木生长之间的关系表现为,坡下的土壤养分间相关系数较坡中和坡上高,阴坡的土壤养分间相关系数较阳坡高。其中,油松人工林坡下、阴坡土壤有机C、全N、全P、速效N和速效P之间呈显著正相关(p0.05),说明油松人工林坡下、阴坡土壤养分之间联系较为紧密;坡下、阴坡土壤有机C、全N、全P、速效N和速效P与胸径、树高之间呈显著正相关关系(p0.05),说明辽西地区坡下、阴坡土壤养分对油松生长具有明显的促进作用,且坡下相关系数较坡中和坡上高,阴坡相关系数较阳坡高。樟子松人工林土壤养分与林木生长性状方面的关系表现与油松人工林相同,并且坡下、阴坡土壤有机C、Ca、全P、速效N、速效P、胸径和树高之间呈显著正相关关系(p0.05)。(4)辽东地区油松和樟子松人工林土壤养分与林木生长之间的关系与辽西分析结果基本一致。即坡下、阴坡的土壤养分间相关系数,以及土壤养分与林木生长性状间的相关系数较高。其中,油松人工林坡下、阴坡土壤有机C、全N、全P、速效N和速效P之间呈显著正相关(p0.05);坡下、阴坡土壤有机C、全N、全P、速效N和速效P与胸径、树高之间呈显著正相关关系(p0.05)。樟子松人工林坡下、阴坡土壤有机C、Ca、全P、速效N、速效P、胸径和树高之间呈显著正相关关系(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.
【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】：S714.8
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本文编号：1636732