丘陵山区林地土壤养分状况研究——以江西省兴国县为例

Study on Soil Nutrient Status of Woodland in Hilly Region——A case study in Xinguo county of Jiangxi province

在江西省兴国县林地采集84个耕层样品,样地按坡向、海拔、土壤类型和林分类型分类,用来比较和确定对林地土壤肥力的影响。分析结果表明:该区林地土壤pH、全N、有机质、全P和速效P的含量均较低,坡向朝南的低海拔土壤比坡向朝北的高海拔土壤的全N和有机质含量低;全N、有机质、全P含量在马尾松纯林中最低,全K含量却最高;全N和有机质含量在阔叶林中最高;全N和有机质含量由黄壤、黄红壤、棕红壤到红壤依次降低;坡向和全N、有机质含量呈显著正相关关系,海拔和全N、有机质含量呈极显著正相关关系;海拔和全P的相关关系达显著水平,呈显著正相关关系。

Soil samples were collected from 84 sample sites in woodland of Xingguo county in Jiangxi province. Sample sites were stratified on the basis of aspect and elevation, soil type,forest type. The strata were compared to determine the influence on woodland soil fertility. The results showed that the soils have small values for pH, total nitrogen, organic matter, total phosphorus and available phosphorus. Soils on southfacing slopes at low elevation contained significantly less total nitrogen and organic matter compared with soils from northfacing slopes at high elevation. The contents of total nitrogen, organic matter and total phosphorus are low, and the content of total potassium is high in Pinus massonniana forest; The contents of total nitrogen and organic matter are high in broadleaved forest; The contents of total nitrogen and organic matte decreased in turn from yellow soil, yellowred soil, brownred soil to red soil; The correlation with aspect and the content of total nitrogen and organic matter is positively significant. The correlation with elevation and total nitrogen, organic matter and total phosphorus is highly significant or significant.