| Ping Lu county of ShanXi province is the main tobacco growing area, and one of the main raw material base of the Jilin tobacco industry company.It is important significance for its own tobacco planting and tobacco industries of Jilin.This study on the county's major tobacco was to evaluate suitability of the soil fertility and chemical quality of flue-cured tobacco, and used the GIS technology on soil fertility and chemical quality of flue-cured tobacco for division, the main conclusions:(1) 60.0% of the soil was slightly alkaline in Ping Lu county, 35.7% of the soil was neutral, in the appropriate range of 19.6%; the average organic matter content of 16.20mg/kg in the appropriate accounting for 63.0% range; available nitrogen content ranged from 17.14 ~ 124.52mg/kg, in a suitable range of 67.4%; the average content of the soil available potassium was 217.17mg/kg, as a whole was rich; available phosphorus content less than 10mg/kg of tobacco soil 26.1%, indicating a low content of available phosphorus in some areas; water-soluble chloride content in the appropriate range of 47.8%, while greater than 45mg/kg of tobacco soil 26.1%, this part of the high soil water-soluble chloride ; four kinds of available microelements, only the effective average content of iron (2.66mg/kg) under the absence of critical levels (4.50mg/kg). The coefficient of variation of trace elements was larger, the overall presentation of available Cu (84.15%)> available Mn (77.24%)> available Fe (63.91%)> available Zn (43.55%). Therefore, the county was very uneven distribution of micronutrients, among them was lack of available iron.(2) In the eight townships, the pH value of the neutral soil in the Sanmen and Guoyuan towns , while others mean the township in the slightly alkaline range, which the Buguan's highest officials, Sanmen of the lowest; the Buguan of the highest officials of the soil organic matter content often the lowest content of Changle; soil nitrogen content was highest in Sanmen, the lowest concentration was Changle; the soil available potassium content of the highest Caochuan, followed the Xiaping; Guoyuan, high levels of water-soluble chlorine, other the average concentration of rural areas, where appropriate; eight townships average content of available iron were lower than the suitable range of content, soil available manganese of Zhangdian was highest (13.65 mg / kg), Xiaping was the lowest (2.15 mg / kg) , and the township of effective copper content in the appropriate range, the highest official to the Buguan, Changle, Xiaping, Guoyuan original zinc content was lower than the effective range suitable.(3) The soil IFI of the eight townships were studied show that soil fertility suitability index was 0.24 ~ 0.77, the coefficient of variation was 25.53%, with 28.30% of IFI poor soil, the general level of accounting for 30.30%, while the good soil IFI only 41.40 percent, an average of 0.47, the overall fertility and suitability at a general level. The highest IFI town was Sanmen, Zhangdian second, and Changle lowest in the eight townships(4) On total sugar, the highest levels to Sanmen, followed by Caochuan, Zhangdian minimum; But on reducing sugar, Sanmen was the highest; nicotine to the original highest Guoyuan, Qinglan was minimum; on RS/N, Caochuan was maximum (13.49), Buguan was minimum (9.21); the highest total nitrogen to Sanmen, followed by Buguan and former Guoyuan, Changle was minimum; eight townships than the average TN/N base was less than 1, in which the largest was Caochuan; for potassium and chlorine content and the ratio of potassium and chloride, the Caochuan potassium and K/Cl than the maximum (respectively, 1.58%, 5.61), the Buguan was minimum (respectively, 0.92%, 2.51), the chlorine content of Guoyuan was the highest (0.56%), Qinglan was low chlorine content (0.35%).(5) In eight townships, the coordination index of chemical composition of flue-cured tobacco of Buguan was the highest , Zhangdian was the second, Changle, Qing lan and Guoyuan were lower , the index of other towns were in reasonably level.(6) In tobacco planting area of Ping Lu, the content of neophytadiene in flue-cured showed : Buguan> Zhangdian> Caochuan> Qinglan>Sanmen> Xiaping> Guoyuan> Changle; the total aroma of tobacco in Buguan was the highest,Zhangdian was lower and Changle were the lowest. The final score of the sensory quality showed: Buguan> Zhangdian> Sanmen> Caochuan> Xiaping> Qinglan> Guoyuan> Changle.(7) The soil organic matter and nitrogen were significantly negatively correlated with total sugar and reducing sugar in tobacco. The soil organic matter and nitrogen were positively correlated with nicotine and total nitrogen. The soil water-soluble chloride was significantly correlated with the content of chlorine in tobacco leaves, the water-soluble chloride positively correlated with K/Cl. The soil organic matter was positively correlated with neophytadiene and neutral aroma constituents in flue-cured tobacco. (8) The level of soil fertility status were, (fine): Sanmen, Zhangdian, Buguan and Chaochuan, (general): Guoyuan and Qinglan, (poor) Xiaping and Changle.The level of chemical coordination status was, (fine) Buguan; (good): Caochuan, Zhangdian, Buguan and Xiaping; (general): Qinglan, Guoyuan; (poor): Changle.High aroma area: Buguan, Zhangdian and Caochuan. The level of apparent status was, (fine): Sanmen, Zhangdian and Caochuan; (general): Xiaping, Caochuan,Qinglan and Guoyuan; (poor): Changle... |
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