| Effect of nitrogen and potassium application strategies on nitrate of topsoil and potato |
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| DOI：10.7606/j.issn.1000-7601.2012.05.26 |
| Key Words: strategy nitrate interaction regression model |
| Author Name | Affiliation | | DONG Huan | College of Land and Environmental Sciences, Shenyang Agricultural University, Shenyang, Liaoning 110161, China
Liaoning Academy of Agricultural Sciences, Shenyang, Liaoning 110161, China | | LOU Chunrong | Liaoning Academy of Agricultural Sciences, Shenyang, Liaoning 110161, China | | SHI Shuqiang | Liaoning Academy of Agricultural Sciences, Shenyang, Liaoning 110161, China | | WANG Xiujuan | Liaoning Academy of Agricultural Sciences, Shenyang, Liaoning 110161, China |
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| Abstract: |
| Excessive nitrogen or imbalance of fertilizer application during agricultural production makes nitrate pollution, which is the risk of the human environment. Therefore, the study of fertilizer application and a reasonable ratio and its effect on soil nitrate and crop nitrate have a great practical meaning. Using a complete experiment of two-factor of N and K with four-level, and through measuring potato nitrate and topsoil nitrate as well as through analysis of variance and regression analysis, the response rule of potato nitrate and topsoil nitrate on N and K and the interaction effect of the two factors on the nitrate were researched. The result showed that the application rate of nitrogen was 151.65 kg/hm2 and the application rate of potassium was 194.025 kg/hm2 in order to reach the lowest topsoil nitrate. The application rate of nitrogen was 224.025 kg/hm2 and the application rate of potassium was 266.925 kg/hm2 in order to absorb more soil nitrate. |
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