Nutrient Abundance and Deficiency in Tobacco Planting Soil and Spatial Variation Analysis in Jiaohe City
[Objective]To clarify the nutrient and trace element status of the soil of Jiaohe tobacco planting and to provide a theoretical basis for the local planting planning and zoning,fertilizer utilization and soil improvement.[Method]We used the global positioning system(GPS)and five-point sampling method to collect 143 soil samples from the townships of Jiaohe tobacco planting area,and analyzed the spatial variation characteristics of soil nutrient and trace element indicators in the area by using the traditional statistical methods and geostatistical analysis methods combined with GIS technology.[Result]The soil of Jiaohe tobacco planting area was weakly acidic(pH＜7),the pH value and quick-acting iron content CV＜10%of the tobacco planting soil showed a weak variability,the coefficient of variation of effective copper was the lar-gest 88.98%,and the rest of the soil fertility nutrients were moderately variable,and the K-S values of effective nitrogen,total nitrogen,slow-act-ing potassium,effective iron,and organic matter were all greater than 0.05,reaching the significant level,and showing a normal distribution;Ob-vious spatial correlation appeared between the nutrients of tobacco-planting soil,and the rest were exponential model except effective N and slow-acting K for Gaussian model;pH and effective Fe,Mn,Zn had significant positive correlation,available nitrogen and effective phosphorus had highly significant positive correlation with each other,and highly significant negative correlation with fast-acting K;spatial distribution of the two regions of the Southwest and Northeast were low in pH.The spatial distribution of organic matter and total nitrogen was similar,showing a lower distribution in the northwest,soil available nitrogen content was were in the north and south,the nitrogen content in the central region was appropriate,but the overall level was in the middle of the upper level,and the overall content of exchangeable magnesium was higher than the appropriate range for the growth and development of tobacco,and the spatial distribution of effective copper and effective manganese was similar,with effective copper in the eastern and northwestern regions and effective manganese in the overall tobacco planting area of Jiaohe.The effective copper and effective manganese in the eastern and northwestern areas of Jiaohe and the overall tobacco planting area were in the suit-able range for tobacco growth.[Conclusion]The use of N and Mg fertilizers should be controlled in Jiaohe,and potassium fertilizer can be ap-plied to offset the negative effect of Mg fertilizer.
万方数据
维普
