| Spatio-temporal variability of available N，P and K in Ochric Aquic Cambosols in North China Plain |
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| DOI：10.7606/j.issn.1000-7601.2005.04.07 |
| Key Words: Ochric Aquic Cambosols available nutrient spatio-temporal variability |
| Author Name | Affiliation | | ZHU An-ning | Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China；College of Water Resources and Environment,Hohai University,Nanjing 210008,China | | ZHANG Jia-bao | Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China；College of Water Resources and Environment,Hohai University,Nanjing 210008,China | | LI Li-ping | Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China | | FENG Jie | Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China |
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| Abstract: |
| A 2-year field experiment was conducted in North China Plain to determine the spatio-temporal variability of available N, P and K in ochric aquic cambosols,and to evaluate the effect of available nutrients on crop yield. The results showed that the content of hydrolyzable N tended to increase, the content of available K was relatively high but tended to decrease gradually with time, and the level of available P was very low and showed a high spatial variation. It was suggested that site-specific fertilizer management rather than traditional fertilization be adopted so as to improve the spatio-temporal variability of soil available nutrients. |
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