当前位置: 首页 > 文章 > 钾肥用量对甜荞麦产量和钾素利用效率的影响 植物营养与肥料学报 2013 (2) 340-346
Position: Home > Articles > 钾肥用量对甜荞麦产量和钾素利用效率的影响 Journal of Plant Nutrition and Fertilizers 2013 (2) 340-346

钾肥用量对甜荞麦产量和钾素利用效率的影响

作  者:
侯迷红;范富;宋桂云;苏雅乐;纪凤辉
单  位:
内蒙古民族大学农学院;通辽市土壤肥料工作站
关键词:
钾肥用量;甜荞麦;产量;钾肥利用率
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 22.5~45 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.
单  位:
1 College of Agronomy,Inner Mongolia University for Nationalities,Tongliao,Inner Mongolia 028043,China%2 Soil and Fertilizer Workstation of Tongliao City,Tongliao,Inner Mongolia 028000,China
关键词:
K application rate%buckwheat%yield%K use efficiency
摘  要:
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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