| 两种钾肥对湖北棉区棉花养分吸收及经济效益的影响 |
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| 引用本文： | 汤帆,齐永波,李春雷,黄青颖,胡红青,夏宝华,黄展林,魏来.两种钾肥对湖北棉区棉花养分吸收及经济效益的影响[J].中国土壤与肥料,2014(1):37-41. |
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| 作者姓名： | 汤帆 齐永波 李春雷 黄青颖 胡红青 夏宝华 黄展林 魏来 |
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| 作者单位： | 1.华中农业大学资源与环境学院，湖北武汉430070；2.国投新疆罗布泊钾盐有限责任公司，新疆哈密839000；3.浙江浙农爱普贸易有限公司，浙江杭州310052 |
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| 基金项目： | 浙江浙农爱普贸易有限公司资助项目（20110402） |
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| 摘 要： | 通过田间试验研究了钾肥用量(K2O 75、150、225 kg/hm2)与种类对棉花产量、养分吸收及经济效益的影响。结果表明:施硫酸钾与硫酸钾镁都能增加产量,提高养分含量及经济效益,两者相比,在低、中、高3个水平上棉花产量前者比后者分别提高3.5%、3.2%和1.4%;相比硫酸钾镁,施硫酸钾可使棉花对氮、磷的吸收量增加,棉花根的氮含量平均增加13.9%,茎的磷含量平均增加2.7%,但对钾、钙、镁、硫的吸收量影响较少。施用硫酸钾比施用硫酸钾镁所获的效益平均高540元/hm2,且在施K2O 75 kg/hm2处理所获效益最高,比不施钾肥多获效益10 350元/hm2。
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| 关 键 词： | 硫酸钾 硫酸钾镁 棉花 养分吸收 经济效益 |
| 收稿时间： | 2013/4/11 0:00:00 |
| 修稿时间： | 2013/7/24 0:00:00 |
Effects of two types of K fertilizers on nutrient uptake and economic benefit of cotton |
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| Abstract: | Effects of different K fertilizers and application rates (K2O 75,150 and 225 kg/hm2) on cotton yield,nutrient uptake and economic benefit were studied through a field experiment in fluvo aquic soil.The results showed that cotton yields were significantly increased by application of potassium.Applying potassium sulfate compared with magnesium potassium sulfate,cotton yield increased by 3.5% in low level,by 3.2% in middle level,and 1.4% in high level,respectively.The uptake of nutrient also increased in the treatments of both K fertilizers.However,different fertilizers affected nutrient contents in the plant.Compared to magnesium potassium sulfate,potassium sulfate fertilizer could make an average growth of 13.9% on accumulation of N in root and an average increase of 2.7% on accumulation of P in stem,but a reduction of K,Ca,Mg and S.Relatively higher net income were obtained from K treatments in despite of higher input.Treatment of potassium sulfate fertilizer had a higher economic benefit than that of magnesium potassium sulfate,more than 540 yuan/hm2 in average.And the treatment of potassium sulfate in 75 kg/hm2 level had the maximum growth in economic benefits,10 350 yuan/hm2 higher than the no K fertilized treatment. |
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| Keywords: | potassium sulfate magnesium potassium sulfate cotton nutrient uptake economic benefit |
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