[1]FANG Rui-hong,CHANG Qing-rui.Study on Spatial Distribution Pattern of Soil Nutrients in Guanzhong Plain -A Case Study in Chang’an District of Xi’an City[J].Research of Soil and Water Conservation,2011,18(06):141-145.
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Study on Spatial Distribution Pattern of Soil Nutrients in Guanzhong Plain -A Case Study in Chang’an District of Xi’an City
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
18
Number of periods:
2011 06
Page number:
141-145
Column:
Public date:
2011-12-20
- Title:
- Study on Spatial Distribution Pattern of Soil Nutrients in Guanzhong Plain -A Case Study in Chang’an District of Xi’an City
- Keywords:
- soil nutrient; spatial variability; geostatistics; GIS
- CLC:
- S158
- DOI:
- -
- Abstract:
- In order to increase the efficiency of applied fertilizers of precision agriculture and reveal spatial distribution characteristics of soil nutrients in Guanzhong Plain, a total of 3 231 points for soil sampling were selected in the area of 836.69 km2 in Chang’an District of Xi’an, Shaanxi Province. The soil nutrient indices including available phosphorous(AP), available potassium(AK), available nitrogen(AN), soil pH and organic matter(SOM) were analyzed with classic statistics and geostatistics method. The results indicated that the variability coefficients of soil nutrients ranged from 0.09 to 0.84 and the order of the variation degree was AP>AK>AN>SOM>pH. The semi-variograms of SOM, AN, AP, AK and pH were best described by exponential model. Those soil properties had different spatial correlations respectively, pH had the significant spatial correlation, AK and AN had the moderate spatial correlation, and AP and SOM had the weak spatial correlation. Spatial distribution pattern of soil nutrients in the study area could be obtained by using Kriging interpolation.
- References:
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