【摘要】 采用裂区试验设计,以施钾水平为主处理,补水时期为副处理,研究了补充供水和钾素处理对马铃薯产量和水分利用效率的影响。结果表明,施钾量、补水时期及其交互作用对马铃薯产量和水分利用效率的影响达到了显著水平。在施钾量(K2O)90 kg/hm2、苗期补水的条件下,产量达到36324.97 kg/hm2,水分利用效率达到94.2 kg/(mm.hm2),比不施钾、不补水处理的产量和水分利用效率分别提高了32.24%、30.7%。更多还原

【Abstract】 The experiment of split-plot design with potassium application as main treatments and stage of water supplement as sub treatments was conducted to study the effect of the treatments on potato yield and WUE in semiarid area.The results showed that the difference of amount of potassium application,stage of water supplement and their interaction on yield and WUE reached significant level or very significant level.Under the condition of K(90 kg/hm2) and seedling stage of water supplement,the yield and WUE reached 36324.97 kg/hm2,94.2 kg/(mm·hm2),respectively.The yield and WUE increased by 32.24%,30.7% comparing with CK,respectively.更多还原