| Effects of different potassium fertilizers on yield and quality of potato in central Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2013.03.18 |
| Key Words: potassium sulfate potassium chloride potato yield quality net income |
| Author Name | Affiliation | | GONG Chengwen | Agricultural Institute of soil fertilizer and water saving, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | FENG Shoujiang | Agricultural Institute of soil fertilizer and water saving, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | ZHAO Xinnan | Agricultural Institute of soil fertilizer and water saving, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | MA Zhongming | Agricultural Institute of soil fertilizer and water saving, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | FAN Aiping | Agricultural Technology and Extended Center of Zhang County, Zhang County, Gansu 748300, China | | YANG Junlin | Agricultural Institute of soil fertilizer and water saving, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In attempt to determine the appropriate variety and amount of potassium fertilizer usage in the process of potato
produetion, K2SO4 and KCl were tested in 2009 at Zhang County, Gansu Province. Above-field height, branch number, economie characters of potato plants and potato yield were analyzed and measured, and quality and economic efficiency of potato were estimated as well. Test results indicated that usage of potassium fertilizer effectively improved plant height, branch number, yield and quality of potato. With same potassium species, potatoes using high dosage of K2O 105 kg·hm-2 had highest tuber size, large and medium-sized potato ratio, yield, dry materials, crude starch and Vc but lowest decaying potato proportion and reducing sugar content. Potatoes using low dosage of K2O 60 kg·hm-2 the highest crude protein level. At same potassium level, branches number, per
plant tubers, fresh weight of large and medium-sized potato, large and medium-sized potato ratio, contention of dry material, crude starch, crude protein, and yield of using Potassium Sulfate were higher than that of using Potassium Chloride. On the other hand, the difference of plant height was not significant and the contention of reducing sugar and rotten potato ratio was lower than that of using Potassium Chloride. Therefore, using K2SO4 has more advantages in produetion of potatoes than using KCl in central Gansu area.
Combined with applications of N 120 kg·hm-2,P2O5 60kg·hm-2, applying K2O 105 kg·hm-2 improved the yield and quality significantly, and had the best output and the highest net incomes. |
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