PEI Zhongxue,WU Yan,WANG Qiong,et al.Correlations Between Soil Porosity-Related Parameters and Other Soil Parameters in Songnen Plain, Northeastern China[J].Research of Soil and Water Conservation,2016,23(02):134-138.
松嫩平原土壤孔隙指标与其他土壤指标的相关关系
- Title:
- Correlations Between Soil Porosity-Related Parameters and Other Soil Parameters in Songnen Plain, Northeastern China
- Keywords:
- soil physical properties; correlation; regression analysis
- 分类号:
- Q948.113
- 摘要:
- 为了研究东北地区黑土区土壤物理性质变化对土壤功能维持的影响，选取松嫩平原的土壤样品作为试验材料，测定了土壤物理指标中3个孔隙相关指标包括土壤比表面积、容重和孔隙度，10个土壤理化及肥力相关指标包括土壤pH值、电导率（EC）、土壤含水量、土壤有机碳（SOC）、全氮（TN）、碱解氮（AN）、全钾（TK）、速效钾（AK）、全磷（TP）、速效磷（AP）。结果显示：3个指标与其他指标显著相关个数及相关系数R2显示，土壤容重与土壤肥力及理化性质变化相关性最高。不同物理指标对于表征土壤肥力的功能存在差异性，简单线性回归与逐步回归均发现类似的规律：土壤的比表面积与土壤含水量的相关性最强（R2=0.24，slope=0.085），表明土壤比表面积越大，土壤持水能力越强；土壤容重与土壤SOC含量相关程度最强（R2=0.21，slope=-24.92），而土壤的孔隙度与TN含量的相关程度最高（R2=0.08，slope=0.02）。3个指标与养分的不同形式的相关性分析结果显示：它们多与全量养分（TN、TK、TP）相关性较高（R2=0.058），而与养分速效量（AN、AK和AP）相关性较弱（R2=0.026）。
- Abstract:
- In order to study the influence of soil physical property change on the soil function of the black soil in northeast of China, soil samples from different regions of Songnen Plain were selected as the research materials, and 3 soil porosity-related parameters such as soil specific surface area, soil bulk density and soil porosity were measured, and 10 parameters such as soil fertility and soil physic-chemical properties including soil pH, soil electrical conductivity (EC), soil water content, soil organic carbon (SOC), total nitrogen (TN), alkali-hydrolyzed nitrogen (AN), total potassium (TK), available potassium (AK), total phosphorus (TP), available phosphorus (AP). The results showed that number of significant correlation and R2 of various correlations between 3 physical properties and other soil parameters indicated that soil bulk density had the most significant correlation with variable soil fertility, soil physic-chemical parameters. Different physical parameters differed in their predicating abilities of variable aspect of soil fertility, both simple linear regression and stepwise regression have found the similar rule: soil specific surface area is capable of predicting soil water due to the fact of strongest positive correlation between these parameters and soil water content(R2=0.24, slope=0.085); soil bulk density was significantly correlated with SOC (R2=0.21, slope=-24.92), while soil porosity was significantly correlated with TN (R2=0.08, slope=0.02). The correlation analysis between 3 soil physical parameters and different forms of nutrients showed that soil physical parameters were generally highly correlated with total nutrients (TN, TK, TP)(R2=0.058), but had relatively weak relations with their available forms (AN, AK, AP)(R2=0.026).
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备注/Memo
收稿日期:2015-03-19;改回日期:2015-04-10。
基金项目:国家自然科学基金（31170575，41373075）
作者简介:裴忠雪(1990-),女(满),黑龙江省克山县人,硕士研究生,研究方向:植物生态学。E-mail:1009764815@qq.com
通讯作者:王文杰(1974-),男,河北省易县人,教授,研究方向:植物生态学。E-mail:wjwang225@hotmail.com