园林绿化废弃物堆肥对公园绿地土壤的改良研究

为促进园林绿化废弃物资源化利用，改善公园绿地土壤质量，拟采用园林绿化废弃物堆肥产品对北海公园绿地土壤进行改良。北海公园绿地土壤压实严重，理化性质总体较差，已经严重阻碍植物生长。对此现状，试验共设3 个处理，园林绿化废弃物的添加量分别为25、40、55 kg/m3。经一个生长季后，对改良后土壤容重、孔隙度、pH、有机质、速效养分含量等物理化学性质进行分析。结果表明：向土壤中添加园林绿化废弃物堆肥产品可使土壤理化性质得到改善，利于植物生长。其中添加量为40 g/m3处理效果最佳，改良后土壤容重达到1.34 g/cm3，pH 8.09~8.11，有机质含量增加了2~3 倍，为29.32~53.31 g/kg，速效养分从全国第二次土壤普查养分分级标准的五级以下水平达到二级以上水平。

Improvement Effect of Landscaping Waste Compost on Park Green Soil Quality

In order to promote the utilization of garden green waste and improve the soil quality of the park green land, the research adopts the green waste compost products to ameliorate the soil quality of Beihai park. The soil has been squeezed seriously and its physical and chemical properties are poor, which has seriously hindered the growth of plants. For this situation, there are three treatments, the green waste compost products were added respectively with 25kg/m3, 40kg/m3 and 55kg/m3. After a growing season, the physical and chemical properties of soil bulk density, porosity, pH, organic matter and available nutrient content of the modified soil were analyzed again. The results showed that the soil physical and chemical properties are improved and are suitable for plant growing. The adding amount of 40g/m3 treatment has the best effect, improved soil bulk density reached 1.34g/cm3, pH 8.09 to 8.11, organic matter content increased 2 ~ 3 times for 29.32 to 53.31g/kg and available nutrients from five levels and below to two levels and above of the grading standards for the second national soil nutrient survey.