南丰蜜桔果园土壤的基本理化性质分析

Soil Basic Physical and Chemical Properties of Nan Fung Orange Orchard

论文采集了南丰某蜜桔果园内土壤,分析了土壤p H值、有机质含量、碱解氮含量、速效磷含量、全钾含量和重金属等多项理化指标。分析结果表明:土壤p H值、有机质含量、碱解氮含量、速效磷含量以及全钾含量平均值分别为4.72、2.436%、70.68 mg/kg、125.3 mg/kg、35.13 g/kg;土壤Cu、Zn、Cd和Pb四种重金属含量平均值分别为39.15mg/kg、131.7 mg/kg、0.3471 mg/kg和50.61 mg/kg。研究结果表明,南丰蜜桔果园土壤呈强酸性,严重制约蜜桔植株的生长,急待进行酸化土壤改良;有机质含量偏低,不适宜蜜桔植株生长,也需进一步培肥土壤。土壤中Cu、Zn、Pb含量符合国家土壤的二级标准,Cd的含量超出国家土壤二级标准,存在Cd污染的情况,需提高警惕。

The test soil was sampled from a certain orange orchard of in Nan Fung town Jiangxi province,and multiple basic physical and chemical properties,including soil p H,content of organic matter,alkaline hydrolysis nitrogen,available phosphorus,total potassium and content of Cu,Zn,Cd,Pb were analyzed. The analysis results were as follows： soil p H,content of organic matter,alkaline hydrolysis nitrogen,available phosphorus,total potassium were 4. 72,2. 436%,70. 68 mg / kg,125. 3mg / kg,35. 13 g / kg respectively; the content of Cu,Zn,Cd and Pb were 39. 15 mg / kg,131. 7 mg / kg,0. 3471 mg / kg and50. 61 mg / kg respectively. The result showed that the soil of the orange orchard was strongly acid,which restricted the growth of orange plant and need to be improved urgently. the content of organic matter was lower than the regulated content for orange growth,so the test soil needs to be further fertilized. In addition,the content of Cd was higher than the second grade of Standards for Soil Environmental Quality of China（ GB 15618- 2008）,which needed to be vigilant.