The Daxinganling area collided during the Late Paleozoic.The study area Hongwei-Xiongguan-Songheyi Dongshan area is located at the superimposed transition site of the Paleozoic paleo-Asian tectonic-metallogenic domain...The Daxinganling area collided during the Late Paleozoic.The study area Hongwei-Xiongguan-Songheyi Dongshan area is located at the superimposed transition site of the Paleozoic paleo-Asian tectonic-metallogenic domain and the Mesozoic-Cenozoic Pacific Ocean tectonic-mineralization area.It is a good ore-forming fluid channel and has very good ore metallogenic geological conditions.The comprehensive research and metallogenic prediction of the geological background and geochemical characteristics of this area are carried out.It is believed that this area has good prospecting potential,and the prospecting area is circled.Suggestions for further prospecting work in this area are put forward.展开更多
了解我国大兴安岭南段(半干旱区)天然杨桦次生林土壤有机碳(SOC)、全氮(TN)、全磷(TP)等养分含量及化学计量特征,有助于深入地认识该区域内林地土壤养分循环规律,为半干旱区内天然林生态系统物质平衡和稳定维持提供理论依据。本文以大...了解我国大兴安岭南段(半干旱区)天然杨桦次生林土壤有机碳(SOC)、全氮(TN)、全磷(TP)等养分含量及化学计量特征,有助于深入地认识该区域内林地土壤养分循环规律,为半干旱区内天然林生态系统物质平衡和稳定维持提供理论依据。本文以大兴安岭南段的赛罕乌拉及罕山两森林生态站(以下简称赛罕乌拉、罕山)杨桦次生林土壤为研究对象,测定表层(0~10 cm)、中层(10~30 cm)、下层(30~60 cm)土壤的SOC、TN、TP含量及其化学计量特征。研究结果表明:赛罕乌拉杨桦次生林土壤中SOC、TN、TP含量(30.22、2.76、0.41 g kg^-1)显著高于罕山土壤中SOC、TN、TP含量(15.20、1.38、0.29 g kg^-1),且土壤SOC、TN高于全国森林水平(11.2、1.06、0.65 g kg^-1),而P元素含量低于全国林业土壤平均水平;土壤SOC、TN含量之间均呈正相关,且SOC、TN间相关系数达极显著水平(P<0.01)。另外,赛罕乌拉及罕山杨桦次生林C∶N、N∶P值均高于全国土壤水平,而不利于土壤N含量的提高;C∶P值均低于全国土壤水平,则有利于土壤P含量的提高。相关分析结果还表明,海拔、容重、pH、粉粒含量是土壤SOC、TN、TP含量的主要驱动因子,海拔和粉粒含量与土壤SOC、TN、TP含量呈极显著或显著正相关;容重、PH与土壤SOC、TN、TP含量呈极显著或显著负相关。展开更多
文摘The Daxinganling area collided during the Late Paleozoic.The study area Hongwei-Xiongguan-Songheyi Dongshan area is located at the superimposed transition site of the Paleozoic paleo-Asian tectonic-metallogenic domain and the Mesozoic-Cenozoic Pacific Ocean tectonic-mineralization area.It is a good ore-forming fluid channel and has very good ore metallogenic geological conditions.The comprehensive research and metallogenic prediction of the geological background and geochemical characteristics of this area are carried out.It is believed that this area has good prospecting potential,and the prospecting area is circled.Suggestions for further prospecting work in this area are put forward.
文摘了解我国大兴安岭南段(半干旱区)天然杨桦次生林土壤有机碳(SOC)、全氮(TN)、全磷(TP)等养分含量及化学计量特征,有助于深入地认识该区域内林地土壤养分循环规律,为半干旱区内天然林生态系统物质平衡和稳定维持提供理论依据。本文以大兴安岭南段的赛罕乌拉及罕山两森林生态站(以下简称赛罕乌拉、罕山)杨桦次生林土壤为研究对象,测定表层(0~10 cm)、中层(10~30 cm)、下层(30~60 cm)土壤的SOC、TN、TP含量及其化学计量特征。研究结果表明:赛罕乌拉杨桦次生林土壤中SOC、TN、TP含量(30.22、2.76、0.41 g kg^-1)显著高于罕山土壤中SOC、TN、TP含量(15.20、1.38、0.29 g kg^-1),且土壤SOC、TN高于全国森林水平(11.2、1.06、0.65 g kg^-1),而P元素含量低于全国林业土壤平均水平;土壤SOC、TN含量之间均呈正相关,且SOC、TN间相关系数达极显著水平(P<0.01)。另外,赛罕乌拉及罕山杨桦次生林C∶N、N∶P值均高于全国土壤水平,而不利于土壤N含量的提高;C∶P值均低于全国土壤水平,则有利于土壤P含量的提高。相关分析结果还表明,海拔、容重、pH、粉粒含量是土壤SOC、TN、TP含量的主要驱动因子,海拔和粉粒含量与土壤SOC、TN、TP含量呈极显著或显著正相关;容重、PH与土壤SOC、TN、TP含量呈极显著或显著负相关。