补水时期和施钾量对旱作马铃薯产量和水分利用的影响

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、补水时期以及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150 kg/hm2、苗期补水的条件下,产量达到36 324.97 kg/hm2,水分利用效率达到94.2kg/(mm·hm2),比不施钾、不补水处理产量和水分利用效率分别提高了32.24%、30.7%.

The effect of potassium application and water supplement in different stages on potato yield and WUE in semiarid area

The experiment of split-plot design with potassium application as main treatments and water supplement in different stages 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 the amount of potassium application, different stage of water supplement and their interaction on yield and WUE was in significant level or very significant level. On the condition of K(150 kg·hm^-2) and seedling of water supplement the yield and WUE reached 36 324.97 kg·hm^-2, 94.2 kg·mm·hm^-2, respectively. The yield and WUE increased by 32.24% and 30.7% compared with CK, respectively.