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首页> 外文期刊>International journal of soil science >Relationship Between Soil Characteristics and Fertility Implications in Two Typical Dystrandept Soils of the Cameroon Western Highland
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Relationship Between Soil Characteristics and Fertility Implications in Two Typical Dystrandept Soils of the Cameroon Western Highland

机译：喀麦隆西部高地的两种典型Dystrandeptept土壤的土壤特性与肥力含义的关系

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摘要

The study was undertaken to evaluate the relationships and fertility implications between Organic Carbon (OC), total nitrogen (N), exchangeable potassium (K) and available phosphorus (P) concentrations and sand, silt and clay contents in two dystrandept profiles in the Western Highland of Cameroon. The study was done in the field and completed by a battery of laboratory analyses. The results showed that the two weathering profiles developed on basalt and trachyte were 4 m thick. Among the different soil fractions, sand contents were the lowest, while silt and clay contents were high. There was no significant correlation between sand and the others soil fractions. A negative significant correlation between silt and clay fractions on contrary was noted. Total OC amounts were very high in the humiferous horizon. There was no significant relationship between OC and clay fractions, indicating that these two soil colloids responsible for the studied soil fertility acted independently. The presence of kaolinite as the unigue clay mineral characterized by low surface area and Cation Exchange Capacity (CEC) com pared to organic matter, implies that OC was the main source of soil fertility. There was a significant positive correlation between N and OC (r =0.99, p<0.0001), N and sand fraction (r = 0.93, p<0.02) and between N and K (r = 0.98, p<0.04). Also, there was a significant negative correlation between C:N and K+. Globally, amounts of K were below the critical levels. Available P exhibited a significant positive correlation with OC (r = 0.87, p<0.05) and total N (r = 0.89, p<0.05). Relationships existed among soil physicochemical properties, which positively or negatively interfered with nutrient availability.
机译：进行了这项研究，以评估西部地区两个营养不良链剖面中有机碳（OC），总氮（N），可交换钾（K）和有效磷（P）浓度以及砂，淤泥和粘土含量之间的关系和肥力影响。喀麦隆高地。该研究在该领域完成，并通过一系列实验室分析完成。结果表明，在玄武岩和曲风岩上形成的两个风化剖面厚度均为4 m。在不同的土壤组分中，沙子含量最低，而淤泥和粘土含量最高。沙子与其他土壤组分之间无显着相关性。相反，注意到淤泥和粘土组分之间的负显着相关。腐殖质层中的总OC含量非常高。 OC与粘土组分之间无显着关系，表明负责研究土壤肥力的这两种土壤胶体独立发挥作用。高岭土作为一种独特的粘土矿物的存在，具有比有机物低的表面积和阳离子交换能力（CEC），这表明OC是土壤肥力的主要来源。 N和OC之间（r = 0.99，p <0.0001），N和砂分数（r = 0.93，p <0.02）以及N和K之间存在显着正相关（r = 0.98，p <0.04）。而且，C：N和K +之间存在显着的负相关。在全球范围内，钾的含量低于临界水平。有效磷与OC（r = 0.87，p <0.05）和总氮（r = 0.89，p <0.05）呈显着正相关。土壤理化性质之间存在关系，对养分的可利用性产生正面或负面的影响。

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