建瓯市毛竹林土壤有机质及氮磷钾含量的空间分布

Spatial Distribution of Soil Organic Matter,Nitrogen,Phosphorus and Potassium of Moso Stands in Jianou City,Fujian Province

毛竹产业是建瓯市农村经济的支柱产业,提高毛竹林产量和效益是实现农民增收的重要途径,了解毛竹林土壤的基本肥力性质则是开展毛竹合理施肥,提高毛竹林生产力的基础。研究采集了全市不同乡镇毛竹林土壤表层0~20 cm样品,分析土壤有机质与全量氮磷钾的含量,结果表明：建瓯市各乡镇毛竹林表层土壤有机质含量平均为3.98%,高于当地农田土壤;全氮含量平均为1.48 g.kg-1,与农田土壤大致相当;土壤C/N要显著高于农田土壤;毛竹林土壤中全磷含量平均为2.48 g.kg-1,全钾含量平均为19.09 g.kg-1,相对较高。建瓯毛竹林土壤有机及氮磷钾含量在不同乡镇中分布极为不均,由地统计学插值图件可见,有机质含量在北部及西南部分较高,全氮在四周乡镇较高,全磷在西部较高,全钾在北部及西南部较高。

Moso is widely cultivated in Jianou City and it plays an important role in the local economic development.In order to understand the basic fertility properties of soils of Moso stands in Jianou City,soil samples were collected and the content of organic matter,total nitrogen,phosphorus and potassium were analyzed.Results showed that the average content of soil organic matter in Moso stands was 3.98%,higher than that of the agricultural soils.Total nitrogen was 1.48 g·kg-1,similar to that of the agricultural soils.Total phosphorus and potassium were 2.48 g·kg-1 and 19.09 g·kg-1 respectively,higher than that of the agricultural soils.Spatial distribution of soil organic matter,total nitrogen,phosphorus and potassium varied greatly across the whole city.According to the GIS maps,soil organic matter was higher in the north and southwest part,total nitrogen was higher around the city,total phosphorus was higher in the west part and total potassium was higher in the north and southwest part within the range of Jianou City.