| Analysis of spatial pattern of soil nutrients in the cultivated land of southern Loess Plateau——A case study in Fuxian of Shaanxi |
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| DOI：10.7606/j.issn.1000-7601.2012.03.19 |
| Key Words: geostatistics soil nutrients spatial pattern Fuxian |
| Author Name | Affiliation | | ZOU Qing | College of Information Engineering，Norihueut A & F University, Yangling, Shaanxi 712100, China | | ZHAO Yeting | College of Natural Resources and Entironment, Northwest A & F University, Yangling, Shaanxi 712100, China | | CHANG Qingrui | College of Natural Resources and Entironment, Northwest A & F University, Yangling, Shaanxi 712100, China | | Ll Zhipeng | College of Natural Resources and Entironment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| With Fuxian in Shaanxi as the research site, geostatistics combined with geographical information system (GIS) was applied to study the spatial variability and distribution pattern of soil nutrients in the cultivated land of south-ern Loess Plateau, so as to provide guidance for soil fertilization management
and agricultural production. The result showed that there were significant correlations among most soil nutrients. During the past 20 years, the average content of soil organic matter(SOM) and soil available Mn respectively decreased by 19.08% and 5.95%, while all other soil nu-trients content increased significantly. Under the average 1 214 m sampling scale, soil organic matter(SOM), available
P(AP), available K (AK), Mn and Fe demonstrated moderate spatial dependence, while soil available N demonstrated weak spatial dependence. Soil nutrients content decreased from west to northeast generally, which was affected not only
by complex topography and precipitation, but also by fertilization and artificial cultivation management. AIl in all, soil available K content is abundant, available Mn and Fe are moderate, soil organic matter is widespread shortage in the study area, where 71.16% of cultivated land lacks available Pand 88% lacks available N. According to different crops and regions, some measures should be taken in time to increase the content of soil organic matter, available P and avail-able N in Fuxian County. |
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