不同土壤类型缓效钾含量。不同土壤类型耕层土壤缓效钾差异较大，潮土最高，

Different soil types slow-acting potassium content. The slow-acting potassium in the plough layer of different soil types is quite different, and the highest is the Chao soil, with an average content of 635.22mg/kg and a variation of 81.0~3773.0mg/kg. The brown soil has the lowest average content of 555.94mg/kg, with a variation of 104.0~2122.0mg/kg. The maximum value of soil slow-acting potassium in Weihai agricultural land is 3773mg/kg, and the minimum value is 81mg/kg, which all appear in the Chao soil. Different soil types slow-acting potassium content Chao soil>Brown soil. The content of slow-acting potassium in each subtype of brown soil is relatively small. Except for the tide brown soil, the other subtypes are the average content of the whole city. The tidal brown soil has the highest content, with an average of 603.52mg/kg; the white pulped brown soil follows, with an average of 583.32mg/kg; the brown soil has the lowest content, with an average content of 573.47mg/kg. The content of slow-acting potassium in each sub-category from high to low is as follows: tidal brown soil>white slurry brown soil>typical brown soil>brown soil. The content of slow-acting potassium in subgroups of Chao soil is quite different. The content of subgroups of Chao soil is the highest, with an average of 638.88mg/kg, which is obviously higher than the city average; In the city's average. The order of the slow-acting potassium content of each sub-category is as follows: Chao soil>Saline Chao soil. <br>2) The content of slow-acting potassium in different types of land. The content of slow-acting potassium in the arable layer of different land types is quite different. The content of vegetable field is the highest, with an average of 630.05mg/kg, and the variation range is 105.0~1364.0mg/kg; followed by the grain field, the average content is 592.65mg/kg, the The range is 81.0~3773.0mg/kg; the orchard content is the lowest, with an average of 536.17mg/kg, and the variation range is 104.0~1401.0mg/kg

不同土壤类型缓效钾含量。不同土壤类型耕层土壤缓效钾差异较大，潮土最高，平均含量为635.22mg/kg，变幅为81.0~3773.0mg/kg。棕壤平均含量最低，为555.94mg/kg，变幅为104.0~2122.0mg/kg。威海农用地土壤缓效钾的最大值3773mg/kg，最小值81mg/kg，均出现在潮土中。不同土壤类型缓效钾含量潮土>棕壤。棕壤各亚类缓效钾含量差异较小，除潮棕壤外，其他亚类为全市平均含量。潮棕壤含量最高，平均为603.52mg/kg；白浆化棕壤次之，平均为583.32mg/kg；棕壤性土最低，平均含量为573.47mg/kg。各亚类缓效钾含量由高到低依次为：潮棕壤>白浆化棕壤>典型棕壤>棕壤性土。潮土各亚类缓效钾含量差异较大，潮土亚类含量最高，平均为638.88mg/kg，明显高于全市平均水平；盐化潮土含量最低，平均为529.33mg/kg，明显低于全市平均水平。各亚类缓效钾含量由高到低顺序为：潮土>盐化潮土。<br>2）不同用地类型土壤缓效钾含量。不同用地类型耕层土壤缓效钾含量差异较大，菜地含量最高，平均为630.05mg/kg，变幅为105.0~1364.0mg/kg；其次为粮田，平均含量为592.65mg/kg，变幅为81.0~3773.0mg/kg；果园含量最低，平均为536.17mg/kg，变幅为104.0~1401.0mg/kg

The content of slowly available potassium in different soil types. The difference of slowly available potassium in different soil types was significant, and the highest in fluvo aquic soil, with an average content of 635.22mg/kg, ranged from 81.0 mg / kg to 3773.0 mg / kg. The average content of brown soil was 555.94mg/kg, ranging from 104.0 mg / kg to 2122.0 mg / kg. The maximum and minimum values of slow-release potassium were 3773 mg / kg and 81 mg / kg, respectively, which appeared in fluvo aquic soil. The content of slowly available potassium in fluvo aquic soil was higher than that in brown soil. The content of slowly available potassium in different sub types of brown soil had little difference, except for the tidal brown soil, the other sub groups were the average content of the whole city. The content of Chao brown soil was the highest with an average of 603.52mg/kg, followed by albic brown soil with an average of 583.32mg/kg, and the lowest in brown soil with an average content of 573.47mg/kg. The content of slowly available potassium in the order from high to low was as follows: tidal brown soil > albic brown soil > typical brown soil > brown soil. The content of slowly available potassium in different sub types of fluvo aquic soil is quite different, with the highest content, with an average of 638.88 mg / kg, which is significantly higher than the average level of the whole city; the content of salinized fluvo aquic soil is the lowest, with an average of 529.33 mg / kg, which is significantly lower than the average level of the whole city. The order of slow-release potassium content of each subtype from high to low is: fluvo aquic soil > salinized fluvo aquic soil.<br>2) The content of slowly available potassium in different land use types. The content of slowly available potassium in plough layer of different land use types was quite different, with the highest content of 630.05mg/kg in vegetable field, 105.0-1364.0mg/kg in average; 592.65mg/kg in grain field and 81.0-3773.0mg/kg in grain field; 536.17mg/kg and 104.0-1401.0mg/kg in orchard<br>