营林措施和环境因子对黄河中游刺槐生长的影响
Impact of Forest Management Practices and Environmental Factors on the Growth of Robinia pseudoacacia in the Middle Reaches of the Yellow River
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.
造林密度 / 地形 / 土壤理化性质 / 刺槐 / 冗余分析 / 黄河流域
Afforestation density / topography / soil physical and chemical properties / Robinia pseudoacacia / redundancy analysis / Yellow River Basin
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国家重点研发计划(2016YFC0503702)
2022年陕西省高等教育教学改革研究(22J21)
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