Analysis of Typical Soil Classification and Nutrient Characteristics in the Middle and Lower Reaches of Dongjiang River Basin——Taking Huicheng District as an Example
Taking Huicheng District as an example,this paper classified the typical soil in the middle and lower reaches of the Dongjiang Riv-er Basin,and studied the typical soil nutrient characteristics in the middle and lower reaches of the Dongjiang River Basin by collecting 1619 soil samples for laboratory analysis.The analysis showed that the soil organic matter and total nitrogen content of cultivated land in Huicheng District were above the middle level.The content of organic matter in Qingnigetian and granite red mud field was higher,while the content of organic matter in Wuniditian,red sand shale red land and red sand shale red land was lower.The total nitrogen content of Qingnigetian,granite red mud field,stone soil and granite red yellow mud field was higher,while that of Wuniditian and sandy shale red land was lower.There was a significant linear correlation between soil total nitrogen content and organic matter content. The regression equation was Y=0. 0398X+0.3769,and the correlation coefficient was 0.65.The accumulation of organic matter and total nitrogen content basically conformed to the for-mation law of different classified soils.The content of soil alkali-hydrolyzable nitrogen was generally above the middle level,and the average content level reached the third level standard.The content of available phosphorus in soil was generally at the upper and middle level,and the average content level reached the first level standard. The content of soil available potassium and slowly available potassium was in the lower middle level.The contents of alkali-hydrolyzable nitrogen,available phosphorus,available potassium and slowly available potassium in different soil types were significantly different,and there was no obvious regularity,which was mainly affected by the application of chemical fertilizer.
Dongjiang River BasinMiddle and lower reachesHuicheng DistrictSoil classificationNutrient characteristics
万方数据
