| Rational application rates of nitrogen phosphorus potassium zinc fertilizers and their combining proportion in spring wheat with both high grain yield and high protein contents |
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| DOI：10.7606/j.issn.1000-7601.2006.06.04 |
| Key Words: spring wheat grain yield protein content regression equation optimum rates of fertilization |
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| Abstract: |
| Field experiment with testing analysis was conducted to study the optimum applying rates of nitrogen,phosphorus,potassium,zinc fertilizers and their combining proportions in spring wheat with both high grain yield and high protein contents by a 416-A mixed design under the used soil with medium fertility.The two target function models between wheat grain yield,protein contents and the application rates of nitrogen,phosphorus,potassium,zinc fertilizers were probed.the optimum application rates of nitrogen,phosphorus,potassium,zinc fertilizers and their rational ratios for maximum yield,maximum protein yield and higher protein contents(i.e.more than 13.5%) have been obtained.It was considered by integrated analysis that the optimum rates of nitrogen fertilizer is about 22 kg/666.67m2,the most suitable ratios of N∶P2O5∶K2O range from 1∶0.45∶0.19,which may get the maximum of protein yield,i.e.both yield and protein contents are better. |
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