Abstract:

The spatial distribution characteristics of the representative tobacco-growing The spatial distribution characteristics of the representative tobacco-growing soil nutrients in Nanping areas were studied based on the status of the contents of medium and microelements and the platform of GIS, GPS and GS, and then the regional evaluation was made out. The results showed that the average contents of available zinc and water soluble chloride were respectively 2.55 mg/kg and 20.22 mg/kg, the area, in which the content was above medium respectively accounted for 94.71% and 45.15% of the total cultivated area, the average contents of exchangeable calcium was 531.69 mg/kg, the area, in which the content was lower or medium accounted for 93.68%, exchangeable magnesium was 80.09 mg/kg, the area, in which the content was rich accounted for 70.61%, available sulfur was 35.30 mg/kg, the area, in which the content was above medium accounted for 89.45%, available boron was 0.26mg/kg, the area, in which the content was low accounted for 64.60%. Exchangeable calcium and available zinc could be divided into two type regions, water soluble chloride could be divided into four type regions, and exchangeable magnesium, available sulfur and boron could be divided into three type regions. According to the content of alkali-hydrolysable nitrogen, available phosphorus and water soluble chloride in soil and distribution conditions of these nutrients, eight fertilization regions and five special compounding fertilization regions could be defined, and according to the characteristics of each regions, its corresponding special fertilizer formulations, in order to realize the unified and simplified fertilization.