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山东省烟台市填海造陆居住区绿地土壤质量现状调查与评价

Investigation and evaluation of soil quality in green space in sea reclamation residential areas of Yantai City, Shandong Province

  • 摘要: 以山东省烟台市填海造陆居住区绿地土壤为研究对象,选取9个具有当地典型园林植物群落结构特征的样地,开展土壤4项物理属性和9项化学属性的测定,并运用修正内梅罗指数法进行土壤质量评价。指标测定结果显示:填海造陆居住区绿地表层(0~15 cm)土壤的通气孔隙度和容重分别为6.60%和1.56 g/cm3,处于五级和六级水平;表层和亚表层(15~30 cm)土壤有机质含量分别为14.74 g/kg和9.24 g/kg ,处于四级和五级水平;全氮和土壤碱解氮含量均值分别为0.58 g/kg和16.66 mg/kg ,处于五级和六级水平;表明土壤养分整体处于贫瘠状态。剖面测定结果显示:土壤属性与深度无一致性变化规律;绿地表层和亚表层的内梅罗综合指数均值为0.80和0.76,表明土壤质量很差,存在通气不良、土体紧实和有机质缺乏的问题,不利于城市园林植物的生长。

     

    Abstract: This study focused on the soils for residential green spaces from reclaimed land in Yantai City. The soil properties including 4 soil physical index and 9 chemical indexes were measured from 9 plots which were identified with the typical structural characteristics of local garden plant communities. The modified Nemerow index method was applied for the comprehensive evaluation of soil quality. The results showed that the soil aeration porosity and bulk density of the surface layer (0−15 cm) of the green space in the residential area were 6.60% and 1.56 g/cm3, which were at the fifth and sixth levels, respectively; and the mean value of soil organic matter, a proxy of soil fertility, was 14.74 g/kg, which was at the fourth levels. Meanwhile, the mean values of total nitrogen content and soil alkali-hydrolyzable nitrogen were 0.58 g/kg and 16.66 mg/kg, which were at the fifth and sixth levels. These evidences indicated the soil fertility in the surveyed area was poor. In addition, the results of profile measurements showed no consistent pattern of change in soil properties with increasing depth. The averages of the modified Nemerow index in the surface and sub-surface layers of the green space were 0.80 and 0.76, respectively, indicating that the soil quality was very low, with the problems of poor aeration, compaction, and the lack of soil organic matter, which were not conducive to the growth of urban garden plants.

     

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