上海古树生长环境的土壤质量及评价

Quality and Evaluation of Soil Fitting for Old Tree Growth in Shanghai

对上海14个区32个古银杏、古香樟的样点进行了土壤质量调查、测试与分析,结果表明:上海古银杏、古香樟生长环境的土壤总体上含水量偏高,密度偏高,通气孔隙度低,通气性差;土壤pH值中性偏碱性;有机质、氮、磷含量偏低。这些因素会对古银杏、古香樟的生长造成不利的影响。对存在的问题提出了相应的改良措施。

The investigation and analysis of soil quality at 32 growing spots of old trees, ginkgo biloba and cinnamomum Camphora, were made in total 14 districts in Shanghai. The results show that： there was a higher moisture content generally in soil surrounding old trees, there was higher soil bulk density, lower aeration porosity and weaker air permeability; the soil pH value was neutral but on the alkali side; there was lower content of organic substance such as nitrogen and phosphorus in soil. All described above will effect the growth of old trees. So the paper puts forward relevant measures for improving soil quality.