| The effects of different fertilization structure on yields of sunflower in saline alkali soil |
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| DOI：10.7606/j.issn.1000-7601.2011.01.20 |
| Key Words: saline and alkali soil sunflower fertilizer efficiency growth traints |
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| Abstract: |
| Experiments were conducted to study the effects different fertilization rate on the yields of sunflower growing in saline and alkali soil and to establish a functional equation of fertilizer efficiency. The results show that for the alkali soil: if nitrogen reached 10.56 kg/667m2, the production reached the maximum 183.2 kg/667m2; and if the phosphorus reached 5.71 kg/667m2, the production
reached the maximum 156.9 kg/667m2; and for the saline soil: if nitrogen reached 10.51 kg/667m2, the production reached the maximum 222.6 kg/667m2; and if the phosphorus reached 5.78 kg/667m2, the production reached the maximum 195.8 kg/667m2. Therefore: for the maximum production, the fertilization ratio among nitrogen, phosphate, and potash is 10.51∶5.78∶3, while the best economic yield's fertilization ratio among nitrogen, phosphate, and potash is 7.47∶4.49∶3. |
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