【摘要】 探究营林措施和环境因子对刺槐生长的综合影响，为黄河流域乃至其他类似生态环境下的造林和生态恢复提供重要的科学依据。以黄土高原刺槐林为研究对象，通过测量地形以及刺槐的生长指标，测定土壤理化性质，采用线性拟合、冗余分析和Pearson相关性分析各因素对刺槐生长的影响。结果表明，1）刺槐胸径与造林密度呈极显著负相关（P<0.01），树高与造林密度呈显著负相关（P<0.05），冠幅与造林密度、坡度呈显著负相关（P<0.05）;2）刺槐树高、冠幅与土壤全磷质量分数呈极显著正相关（P<0.01），胸径、冠幅与土壤铵态氮质量分数呈显著正相关（P<0.05）;3）海拔较高时，土壤结构更为疏松，但养分含量相对较低；坡度较大时土壤养分流失严重，对刺槐的生长产生不利影响；4）土壤毛管孔隙度是影响刺槐生长的最重要因素。因此，在造林和管理过程中，根据实际地形和土壤条件，合理确定造林密度，提升土壤肥力，促进刺槐的生长发育。更多还原

【Abstract】 Exploring the combined effects of forest management practices and environmental factors on the growth of Robinia pseudoacacia provides essential scientific evidence for afforestation and ecological restoration in the Yellow River Basin and other similar ecological environments. Focusing on Robinia pseudoacacia forests on the Loess Plateau, we measured topography, growth indicators of Robinia pseudoacacia, and soil physical and chemical properties, employing linear fitting, redundancy analysis, and Pearson correlation analysis to assess the impact of various factors on the growth of Robinia pseudoacacia. The results indicated: 1) Robinia pseudoacacia diameter at breast height(DBH) showed a highly significant negative correlation with afforestation density(P<0. 01), tree height had a significant negative correlation with afforestation density(P<0. 05), and canopy width was significantly negatively correlated with both afforestation density and slope(P<0. 05). 2) Tree height and canopy width of Robinia pseudoacacia showed a highly significant positive correlation with soil total phosphorus content(P<0. 01), while DBH and canopy width were significantly positively correlated with soil ammonium nitrogen content(P<0. 05). 3) At higher altitudes, the soil structure became more loose, but the nutrient content was relatively lower; when the slope was steeper, soil nutrient loss was severe, adversely affecting the growth of Robinia pseudoacacia. 4) Soil capillary porosity was the most important factor influencing the growth of Robinia pseudoacacia. Therefore, during afforestation and management, it is crucial to reasonably determine afforestation density and enhance soil fertility according to the actual topography and soil conditions to promote the growth and development of Robinia pseudoacacia.更多还原