| 钾肥用量对甜荞麦产量和钾素利用效率的影响 |
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| 引用本文： | 侯迷红,范富,宋桂云,苏雅乐,纪凤辉.钾肥用量对甜荞麦产量和钾素利用效率的影响[J].植物营养与肥料学报,2013,19(2):340-346. |
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| 作者姓名： | 侯迷红 范富 宋桂云 苏雅乐 纪凤辉 |
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| 作者单位： | 1.内蒙古民族大学农学院,内蒙古通辽 028043; |
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| 基金项目： | 内蒙古自然科学基金项目，内蒙古民族大学科学研究项目 |
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| 摘 要： | 以甜荞麦大粒荞品种为材料，设4个钾素水平（K2O 0、 22.5、 45和67.5 kg/hm2），通过两年田间试验，研究了钾肥用量对甜荞麦产量、 钾素吸收和利用特性的影响。结果表明，甜荞麦籽粒产量、 籽粒钾素累积量随施钾量的增加先增加后降低，在施钾量为K2O 45 kg/hm2 时达最高。通过二次曲线模拟，在施钾量为K2O 46.2 kg/hm2（2009年）和46.3 kg/hm2（2010年）时产量达到最高。钾素生理效率、 钾素利用效率、 钾肥农学利用率、 钾肥生理利用率、 钾肥效率和钾肥利用效率均随钾肥用量的增加而下降。在本试验条件下，施K2O 22.545 kg/hm2时，通辽市库伦旗甜荞麦可获得较高的钾肥利用率，并获得高产。
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| 关 键 词： | 钾肥用量 甜荞麦 产量 钾肥利用率 |
| 收稿时间： | 2012-09-07 |
Effect of K application rate on yield and K use efficiency of buckwheat |
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| HOU Mi-hong
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FAN Fu
,
SONG Gui-yun
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SU Ya-le
,
JI Feng-hui.Effect of K application rate on yield and K use efficiency of buckwheat[J].Plant Nutrition and Fertilizer Science,2013,19(2):340-346. |
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| Authors: | HOU Mi-hong FAN Fu SONG Gui-yun SU Ya-le JI Feng-hui |
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| Institution: | 1.College of Agronomy,Inner Mongolia University for Nationalities,Tongliao,Inner Mongolia 028043,China; |
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| Abstract: | The effects of potassium (K) application rates on grain yield, K accumulation and use efficiency of buckwheat were studied by fields experiments with K2O rates, 0, 22.5, 45 and 67.5 kg/ha. The cultivar of buckwheat (F. esculentum Moench)，Daliqiao was selected as experimental material. The results show that the grain yield and K accumulation are increased at the first and then gradually decreased with the increment of the K application rates, and the grain yield and K accumulation reach their maxima under the K fertilizer application rate of K2O 45 kg/ha. Simulated by a quadratic curve, the grain yields of buckwheat reach their maxima under K fertilizer application rate of K2O 46.2 kg/ha (2009) and 46.3 kg/ha (2010). The K physiology efficiency, K utilization efficiency, agronomy efficiency of K, K fertilizer physiology use efficiency, K fertilizer efficiency and K fertilizer rate of buckwheat are decreased significantly with the increment of the K application rates．In conclusion, under this field experiment conditions, the most optimal K fertilizer utilization efficiency is K2O 22.5- 45 kg/ha in Kulun town of Tongliao. |
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