| Effects of different fertilization systems on crop yield and soil P and K fertility |
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| DOI：10.7606/j.issn.1000-7601.2010.03.22 |
| Key Words: application of fertilizer soil fertility yield |
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| Abstract: |
| A study on crop yield and soil P and K fertility was conducted based on a consecutive 19-year field trial in different fertilization systems. The result indicated that N treatment had a significant yield- increasing effect on maize .
Soybean yield increased with the application of K fertilizer, while the application of P fertilizer could not increase soybean yield significantly. The application of recycled manure increased soybean seeds and maize grain yields to a certain de-gree. Combined application of NPK and recycled manure could not only increase significantly but also stabilize crop yield. In the treatments without phosphorous fertilizer, the available P content decreased rapidly in the first several
years, then the rate of decrease slowed over time. In the treatments with phosphorous, the soil available P content in-
creased significantly. The concentration of soil available K and slow-release K decreased significantly without K fertilizer application, and the concentration of soil available K and slow- release K maintained the initial value in NPK treatment. The application of recycled manure and NPK fertilizer increased significantly the concentration of soil available K, while the increment of slow-release K was not significant. |
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