County-Scale Spatial Variability of Macronutrient Availability Ratios in Paddy Soils
Macronutrients (N, P, and K) are essential to plants but also can be harmful to the environment when their available concentrations in soil are excessive. Availability ratios (available concentration/total concentration) of macronutrients may reflect their transforming potential between fixed and av...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Applied and Environmental Soil Science |
| Online Access: | http://dx.doi.org/10.1155/2014/689482 |
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| author | Mingkai Qu Weidong Li Chuanrong Zhang |
| author_facet | Mingkai Qu Weidong Li Chuanrong Zhang |
| author_sort | Mingkai Qu |
| collection | DOAJ |
| description | Macronutrients (N, P, and K) are essential to plants but also can be harmful to the environment when their available concentrations in soil are excessive. Availability ratios (available concentration/total concentration) of macronutrients may reflect their transforming potential between fixed and available forms in soil. Understanding their spatial distributions and impact factors can be, therefore, helpful to applying specific measures to modify the availability of macronutrients for agricultural and environmental management purposes. In this study, 636 topsoil samples (0–15 cm) were collected from paddy fields in Shayang County, Central China, for measuring soil properties. Factors influencing macronutrient availability ratios were investigated, and total and available concentrations of macronutrients were mapped using geostatistical method. Spatial distribution maps of macronutrient availability ratios were further derived. Results show that (1) availability of macronutrients is controlled by multiple factors, and (2) macronutrient availability ratios are spatially varied and may not always have spatial patterns identical to those of their corresponding total and available concentrations. These results are more useful than traditional soil macronutrient average content data for guiding site-specific field management for agricultural production and environmental protection. |
| format | Article |
| id | doaj-art-407ed28ac975491fad3457e85549fc44 |
| institution | Kabale University |
| issn | 1687-7667 1687-7675 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Applied and Environmental Soil Science |
| spelling | doaj-art-407ed28ac975491fad3457e85549fc442025-02-03T01:22:00ZengWileyApplied and Environmental Soil Science1687-76671687-76752014-01-01201410.1155/2014/689482689482County-Scale Spatial Variability of Macronutrient Availability Ratios in Paddy SoilsMingkai Qu0Weidong Li1Chuanrong Zhang2Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, ChinaDepartment of Geography and Center for Environmental Sciences and Engineering, University of Connecticut, Storrs, CT 06269, USADepartment of Geography and Center for Environmental Sciences and Engineering, University of Connecticut, Storrs, CT 06269, USAMacronutrients (N, P, and K) are essential to plants but also can be harmful to the environment when their available concentrations in soil are excessive. Availability ratios (available concentration/total concentration) of macronutrients may reflect their transforming potential between fixed and available forms in soil. Understanding their spatial distributions and impact factors can be, therefore, helpful to applying specific measures to modify the availability of macronutrients for agricultural and environmental management purposes. In this study, 636 topsoil samples (0–15 cm) were collected from paddy fields in Shayang County, Central China, for measuring soil properties. Factors influencing macronutrient availability ratios were investigated, and total and available concentrations of macronutrients were mapped using geostatistical method. Spatial distribution maps of macronutrient availability ratios were further derived. Results show that (1) availability of macronutrients is controlled by multiple factors, and (2) macronutrient availability ratios are spatially varied and may not always have spatial patterns identical to those of their corresponding total and available concentrations. These results are more useful than traditional soil macronutrient average content data for guiding site-specific field management for agricultural production and environmental protection.http://dx.doi.org/10.1155/2014/689482 |
| spellingShingle | Mingkai Qu Weidong Li Chuanrong Zhang County-Scale Spatial Variability of Macronutrient Availability Ratios in Paddy Soils Applied and Environmental Soil Science |
| title | County-Scale Spatial Variability of Macronutrient Availability Ratios in Paddy Soils |
| title_full | County-Scale Spatial Variability of Macronutrient Availability Ratios in Paddy Soils |
| title_fullStr | County-Scale Spatial Variability of Macronutrient Availability Ratios in Paddy Soils |
| title_full_unstemmed | County-Scale Spatial Variability of Macronutrient Availability Ratios in Paddy Soils |
| title_short | County-Scale Spatial Variability of Macronutrient Availability Ratios in Paddy Soils |
| title_sort | county scale spatial variability of macronutrient availability ratios in paddy soils |
| url | http://dx.doi.org/10.1155/2014/689482 |
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