山东省莱阳市北部地区土壤养分地球化学评价

Geochemical Evaluation of Soil Nutrients in the Northern Region of Laiyang City in Shandong Province

摘要:

为详细了解莱阳市北部地区表层土壤养分地球化学特征，对6 698件表层土壤样品进行有机质、氮、磷、钾等养分元素含量分析测试，开展土壤养分地球化学单指标及养分综合评价。结果表明：碱解氮整体呈丰富—较丰富状态；磷、钾、速效钾整体呈较丰富—中等状态；有效磷整体呈中等状态；氮元素整体呈较缺乏—缺乏状态；有机质整体呈较缺乏状态。研究区丰富和较丰富面积分别为2.53 km2、208.58 km2，占研究区总面积的比例分别为0.24%、19.87%，养分中等的土壤面积为532.87 km2，占研究区总面积的50.77%，养分较缺乏的土壤面积为297.41 km2，占研究区总面积的比例为28.34%，养分缺乏的土壤面积很少，为8.18 km2。本次研究工作可为莱阳市北部地区土地利用规划，农业经济发展提供科学地质数据支撑。

Abstract:

In order to gain a detailed understanding of geochemical characteristics of surface soil nutrients in the northern region of Laiyang city, Organic matter, nitrogen, phosphorus, potassium, and other nutrient element contents have been analyzed in 6,698 surface soil samples, and geochemical single-indicator and nutrient have been evaluated comprehensively. It is showed that the overall alkaline hydrolyzed nitrogen is in a rich to relatively rich state. Phosphorus, potassium and available potassium are generally in a relatively rich to moderate state. The overall available phosphorus is in a moderate state. The overall nitrogen element is in a relatively deficient state. Organic matter is generally lacking. The overall comprehensive status of soil nutrients in the evaluation area is moderate. The rich and relatively rich areas are 2.53km2 and 208.58km2, respectively, accounting for 0.24% and 19.87% of the total area of the evaluation area. The soil area with moderate nutrients is 532.87km2, accounting for 50.77% of the evaluation area. The soil area with relatively low nutrients is 297.41km2, accounting for 28.34% of the evaluation area. The soil area with nutrient deficiency is very small with 8.18km2. This research work can provide scientific geological data support for land use planning and agricultural economic development in the northern region of Laiyang city.