不同土壤类型全氮含量潮土>棕壤。棕壤中各亚类全氮含量略有差异，白浆化棕

Different soil types total nitrogen content Chao soil> Brown soil. The total nitrogen content of each subtype in the brown soil is slightly different, the white pulped brown soil has the highest content, with an average of 1.02k/kg; the tidal brown soil is followed by 0.96g/kg; the brown soil and typical brown soil have the lowest content , Both are 0.91g/kg. The order of total nitrogen in each sub-category: white pulped brown soil>tidal brown soil>typical brown soil>brown soil. The total nitrogen content of each sub-category in the Chao soil varies greatly. The Chao soil has the highest total nitrogen content, with an average content of 1.02g/kg; The total nitrogen content of all subgroups of Chao soil is Chao soil> salinized Chao soil. <br>(2) Soil total nitrogen content between different land use types. The average total nitrogen content of different types of land varies greatly. Among them, the grain field content is relatively high, with an average of 0.92g/kg and a variation range of 0.1~2.96g/kg. The variation range is large and the content distribution is uneven; followed by vegetable fields The average content is 0.62g/kg, the variation range is 0.43~1.0g/kg; the orchard is the lowest, the average is 0.6g/kg, the variation range is 0.24~1.38g/kg. The total nitrogen content of different land types from high to low is: grain field>vegetable>orchard. The total nitrogen content of each land type is extremely uneven. The total nitrogen content of the plow layer soil with different soil textures is the highest in loamy soils, with an average content of 0.91g/kg; the lowest in sandy soils, with an average of 0.67g/kg. Total nitrogen content in different textures, loamy>sandy. The total nitrogen content of different loamy soils is quite different, the middle loamy soil content is the highest, with an average of 1.24g/kg; the sandy loamy soil content is the lowest, with an average of 0.76g/kg; the maximum occurs in light soil, the content is 2.96g/kg. The total nitrogen content of each loamy soil from high to low is: middle soil>light soil>sand soil. <br>Soil alkaline nitrogen is also called hydrolyzed nitrogen, which includes inorganic mineral nitrogen and organic nitrogen with simple structure and easy decomposition, including ammonium nitrogen and nitrate nitrogen, which can be used by crops in the near future.

Different soil types have a total nitrogen content of tidal soil and brown soil. There was a slight difference in the total nitrogen content of each subcategory in the brown soil, with the highest white-pulped brown soil content being 1.02k/kg, the tide brown soil was 0.96g/kg, and the palm soil and typical brown soil were the lowest, both 0.91g/kg. The total nitrogen high and low order in each subcategory: white-pulpized brown soil, tidal brown soil, typical brown soil, brown soil. The content of sub-class total nitrogen varies greatly from the tide soil to the highest, with an average content of 1.02g/kg, and the lowest salted soil content, with an average of 0.54g/kg. Tidal soil sub-type total nitrogen content of tidal soil - salinized tide soil.<br>(2) The total nitrogen content of soil between different land types. The average content of total nitrogen in soil of different land types varied greatly, with highgrain grain content, with an average of 0.92g/kg, a variation of 0.1 to 2.96g/kg, with a large variation and uneven distribution of content, followed by vegetable land with an average content of 0.62g/kg, with an average content of 0.43 to 1.0g/kg; The total nitrogen content of different land types is from high estuality to low: grain fields, vegetables and orchards. The total nitrogen content of each land type is extremely uneven. The soil total nitrogen content of the soil of different soil texture tillage layer was the highest of the soil, with an average content of 0.91g/kg, and the sand soil content was the lowest, with an average of 0.67g/kg. The whole nitrogen content of different textures, the soil mass and the sand mass. The content of total nitrogen of different soil soil is different, the highest content of the middle soil is 1.24g/kg, the sand soil content is the lowest, the average is 0.76g/kg, and the maximum value is in the light soil, the content is 2.96g/kg. The total nitrogen content of each soil soil is from high to low: the middle soil and the sand soil.<br>Soil alkali nitrogen is also known as hydrolysis, it includes inorganic mineral nitrogen and organic nitrogen with simple and easily decomposable structure, ammonium nitrogen, nitrous nitrogen, etc., for crops to be absorbed and utilized in the near future.

The content of total nitrogen in different soil types was higher in fluvo aquic soil than in brown soil. The content of total nitrogen in brown soil was slightly different. Albic brown soil had the highest content with an average of 1.02k/kg, followed by tidal brown soil (0.96g/kg), and brown soil and typical brown soil had the lowest content (0.91g/kg). The order of total nitrogen was albic brown soil > tidal brown soil > typical brown soil > brown soil. The content of total nitrogen in different sub types of fluvo aquic soil varied greatly, with the highest total nitrogen content (1.02g/kg) and salinized soil (0.54g/kg). The total nitrogen content of each sub type of fluvo aquic soil was higher than that of saline soil.<br>(2) Soil total nitrogen content among different land use types. The average content of total nitrogen in different land use types varied greatly, among which the grain field was higher, with an average of 0.92g/kg, with a range of 0.1-2.96g/kg, with a large range and uneven distribution; the vegetable field, with an average content of 0.62g/kg and a range of 0.43-1.0g/kg, was the lowest, with an average of 0.6g/kg and a range of 0.24-1.38g/kg. The total nitrogen content of different land use types from high to low was grain field > vegetable > orchard. The total nitrogen content of each land type was extremely uneven. The content of total nitrogen in topsoil of different soil textures was the highest in loamy soil with an average of 0.91g/kg, while that of sandy soil was the lowest, with an average of 0.67g/kg. The total nitrogen content of soil texture was higher than that of sandy soil. The content of total nitrogen in different loamy soils was different, with the highest content in medium loam (1.24g/kg), the lowest in sandy loam (0.76g/kg), and the highest in light soil (2.96g/kg). The total nitrogen content of each loamy soil from high to low was: medium soil > light soil > sandy soil.<br>Soil alkali hydrolyzable nitrogen, also known as hydrolyzed nitrogen, includes inorganic mineral nitrogen and organic nitrogen with simple structure and easy decomposition, including ammonium nitrogen and nitrate nitrogen, which can be absorbed and utilized by crops in the near future