• ISSN 1008-505X
  • CN 11-3996/S
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. DOI: 10.11674/zwyf.2013.0209
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. DOI: 10.11674/zwyf.2013.0209
HOU Mi-hong, FAN Fu, SONG Gui-yun, SU Ya-le, JI Feng-hui. Effect of K application rate on yield and K use efficiency of buckwheat[J]. Journal of Plant Nutrition and Fertilizers, 2013, 19(2): 340-346. DOI: 10.11674/zwyf.2013.0209
Citation: HOU Mi-hong, FAN Fu, SONG Gui-yun, SU Ya-le, JI Feng-hui. Effect of K application rate on yield and K use efficiency of buckwheat[J]. Journal of Plant Nutrition and Fertilizers, 2013, 19(2): 340-346. DOI: 10.11674/zwyf.2013.0209

钾肥用量对甜荞麦产量和钾素利用效率的影响

Effect of K application rate on yield and K use efficiency of buckwheat

  • 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。

     

    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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