The Evaluation Studies On Tobacco Soil Nutrient Of Luliang Area

Luliang County, because of good ecological condition,, is a well-known high-quality flue-cured tobacco producing area. Luliang County tobacco has many advantages, for example, pure quality, golden color, luster, moderate thickness, good aroma quality, good combustibility, good compatibility and so on,.It provides the high-quality raw materials for a number of key cigarette industries. In order to evaluate the Luliang tobacco soil, GPS technology was used in Luliang,340 samples were collected, thepH, organic matter, nutrients and trace elements were evaluatedby using geostatistics and GIS technology, the main conclusions are as follows:1. Luliang tobacco soil pH is basiclly suitability, the mean of pH is 5.92, acid (5.5-6.5) and neutral (6.5-7.5) distribution area were 54.19% and 25.11%; Luliang tobacco soil organic matter content is appropriate, the average is 29.99 g/kg; The average of total nitrogen content in Luliang tobacco soil is 1.44 g/kg, the content of total nitrogen in soil of most area is medium, the total nitrogen content of 44.33% of the tobacco soil area is high; Luliang tobacco soil available nitrogen content is medium, the avarage value is 110.12mg/kg, the available nitrogen content of about 22.25% areaof tobacco soil is high; The phosphorus content in tobacco soil Lu Liang is low, the average value is 0.92 g/kg, the total phosphorus content of 96.65% tobacco soil area of Luliang is low; the available P in Luliang tobacco soil is rich, the available P content of 91.11% tobacco soil is high in Luliang; content of total K in Luliang tobacco soil is low, the average value is 11.57g/kg, the content of total K in 97.68% tobacco soil is low; the available potassium of Luliang tobacco soil is medium, average value is 131.45 mg/kg, the content of available potassium in 14.44%Luang tobacco soil is low.2. The available of Luliang tobacco soil is rich, the mean value is up to 2021.48 mg/kg, the available calcium content of all soil samples is above 400mg/kg; the available magnesium content in Luliang is abundant, the average value is 194.69 mg/kg, the available magnesium content in 94.27% tobacco area is more than 100mg/kg; the average content of available sulfur is 52.88mg/kg, the available sulfur content of 98.79% tobacco soil is high.3. The content of active iron in Luliang tobacco is very rich, the average value is up to 76.79 mg/kg, available iron in 98.85% tobacco planting area is more than 20 mg/kg (very high); the content of Mn in Luliang tobacco planting soil is rich, the average value is 36.80 mg/kg, the available manganese in 97.80% of the area is more than 20 (veryhigh); the content of available boron is low, the average content is 0.55 mg/kg, the content of available boron in 32% tobacco planting area is "low" (0.25-0.5 mg/kg); Zinc content in Luliang soil is medium, the average content is 2.14 mg/kg,7.58% tobacco planting area lack of zinc (1.0-1.5); Luliang planting tobacco soil is rich in copper, the average content is up to 1.59 mg/kg, the "high" (1.0-1.8 mg/kg) and "very high" (more than 1.8 mg/kg) distribution area are 55.73% and 39.45%; the available molybdenum content in Luliang tobacco planting soil is low, the average is 0.14mg/kg,69.97% area of tobacco soil lack of molybdenum; the water soluble chloride content in Luliang tobacco planting soil is high, the average value is 49.69 mg/kg, water soluble chloride in 97.57% tobacco soil is more than 30mg/kg.4. For the low PH area,, we suggest using dolomite powder to adjust pH value; For the area which nitrogen content is more than 120 mg/kg, should control the amount of nitrogen fertilizer; all the towns except DaMoGu should control the amount of phosphate; potassium deficiency area should add the using of potash; Medium elements in this area are very rich, The area which the sulfur content in soil is more than 50 mg/kg must control sulfur fertilizer. According to the evaluation results of trace elements in soils of Luliang, we suggest add boron and molybdenum to all the tobacco soil, and add zinc supplementation to Longhai Town, zhaokua town and three Chahe town. the whole area should control the using of chlorine fertilizer.