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一、材料与方法(一)调查区概况长葛市位于河南省中部,许昌北部,北纬34°09′～34°20′,东经113°34′～114°08′,北靠新郑,西连禹州,东北接尉氏,东南邻鄢陵。市境南北21.4km,东西51.9km,总面积650km2,其中耕地面积45589.45km2(耕地和园地面积)。现辖8镇4乡4个街道办事处、362个行政村,土壤类型为褐土、潮土、砂姜黑土3大土类,7个亚类,9个土属,20个土种。土壤耕层质地有松砂土、砂壤土、轻壤土、中壤土4种。(二)调查方法1、样品采集。长葛市自2007年承担国家测土配方施肥项目以来,严格按照农业部《测土配方施肥技术规范》的要求,2007—2011年连续5年在全市不同区域、不同土壤类型采集耕层土壤样品,累计采集土壤样品7355个,填写采样地块调查表7355份。
I. Materials and methods (I) Survey area Changge City is located in the central part of Henan Province, north of Xuchang, latitude 34 ° 09 ’~ 34 ° 20’ and longitude 113 ° 34 ’~ 114 ° 08’ east, with Xinzheng in the north and West Yu, northeast then Weishi, southeast of Yanling. Urban environment 21.4km north and south, east-west 51.9km, a total area of 650km2, of which 45589.45km2 arable land (farmland and garden area). It has jurisdiction over 8 towns, 4 towns, 4 sub-districts offices and 362 administrative villages. The soil type is cinnamon soil, fluvo-aquic soil and sandy lime-black soil. There are three major soil types, seven sub-types, nine soil genera and twenty soil types. Soil plow texture loose soil, sandy loam, light loam, loam 4 species. (B) survey method 1, sample collection. Changge City since 2007 to undertake the national soil testing and fertilizer project, in strict accordance with the Ministry of Agriculture, “Soil Testing and Fertilization Technical Specifications” requirements, 2007-2011 for five consecutive years in the city of different regions, different soil types collected soil samples A total of 7355 soil samples were collected and 7355 questionnaires were filled in.