Spatial Variability Factors Of Soil Available Microscale Elements In Zhanyi

In order to proven smoke zone soil trace element space variation characteristics, reasonable and scientific division trace element content areas, formulate scientific measuring soil fertilization formula, improve the quality of tobacco leaves, further improve the management level and vega improvement of tobacco leaf quality and protect the soil ecological environment. The experiment was carried out in Zhanyi County of Qujing City,The answer shows that:1The content of effective Cu, effective Fe, effective Mn of soil in zhanyi county is very rich, there is no sample be lack of these indexes; Soil effective Zn content is high, effective Bo content is low.Cl content is very high,effective Mo average content is moderate.2The content of effective Cu in the east and northwest of village and township of Zhanyi county are relative to the higher, the content of southern is relatively low. The content of soil effective Zn is vast stretches of distribution. The whole content of soil effective Fe is high, present that middle low, high around.Xiping town southwest soil effective manganese content is relatively low, but the rest of soil effective Mn content are very rich.The northwest of zhanyi soil Cl content is relatively low, while the rest of soil Cl content are very rich.Soil effective Mo content present high in central and low in the surroundings.3Seven soil available microelements difference reached significant or extremely significant level in different types of soil,.4Zhanyi county soil effective Cu, effective Fe and Mn effective reached a very high level, in addition to2000-2100meters water soluble chloride ion in a higher level outside, the rest of the elevation of water-soluble chloride ion content also reached very high levels.5The available microscale elements of different pH range sof oil significantly different, when pH value less than5, effective Cu, effective Zn, Cl and effective Mo content are the lowest. When the ph is alkaline (>7), effective Fe and effective Mn content are the lowest. When Ph is between5and7.the content of soil were higher than critical value. Effective Bo is optimal performance when ph less than5and exceed7, but are less than critical value. Effective iron reduced significantly with ph increases. 6The content of effective Cu, Zn, Mn and Bo are increased significantly as organic content increases.7The content of effective Zn, effective Bo and Cl are the highest when preceding crop is wheat, effective Bo below the critical value, and the content of effective Mo is lowest, lower than critical value, effective Mo restrictive obviously. When the preceding crop as other (including soybeans, green manure, turnip, peas and corn), four kinds of trace elements content were low, go against flue-cured tobacco growth.8The content of effective Zn, effective Bo and Mo are lowest in paddy field landform, this may be because high soil moisture on the dilution and loss. The content of effective Zn and effective Mo are highest, the content of Cl is lowest when landform is terrace.