| Biological effects of potassium fertilizer application on potato in high potash soil |
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| DOI：10.7606/j.issn.1000-7601.2013.04.032 |
| Key Words: potato high potash soil potassium fertilizer yield quality economic benefit |
| Author Name | Affiliation | | HOU Shu-yin1,2, ZHANG Chun-hong1,2,3, QIU Hui-zhen1,2,3, WANG Di1,3,4, LU Jian-wu1,2, SUN Xiao-long1,4, ZHANG Jun-lian1,3,4, ZHANG Wen-ming1,2,3 | （1.甘肃省干旱生境作物学重点实验室， 甘肃 兰州 730070； 2．甘肃农业大学资源与环境学院， 甘肃 兰州 730070；3．甘肃省作物遗传改良与种质创新重点实验室，甘肃 兰州 730070； 4.甘肃农业大学农学院， 甘肃 兰州 730070） |
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| Abstract: |
| In order to optimize nutrient management and to raise use efficiency of fertilizer in the process of potato production, a field experiment was conducted in high potash soil in Dingxi, Gansu Province in 2011. Based on equivalent dosage of nitrogen and phosphorus, the influences of potassium rates
(K0, K120, K240, K360 and K480 representing 0, 120, 240, 360 and 480 kg K2O·hm-2, respectively) on yield, quality and economic benefit of potato were studied. The results showed that the commodity ratio, yield and output value increased at first and then decreased with the increasing of potassium rate. Under the potassium rates of K120 and K240, the commodity ratio and yield were relatively high, and the net income was the highest under K120. The contents of starch,
total sugar, reducing sugar, Vc, protein and dry matter increased at first and then dropped with the increasing of potassium rate. The contents of starch and total sugar were the highest under K240, while the contents of reducing sugar, Vc, protein and dry matter were the highest under K120. It was indicated that the proper application of potassium fertilizer could increase the yield and improve t
he quality of potato in high potash soil. Under the experimental condition, the optimal potassium rates for the highest yield and largest economic benefit were 162.06 kg K2O·hm-2 and 126.44 kg K2O·hm-2, respectively. |
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