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采用田间试验方法,研究了根区交替地下滴灌(APRI)对马铃薯生理指标、产量及水分利用效率的影响.结果表明:在马铃薯块茎生长期,与对照处理(CDI)相比,APRI处理的马铃薯叶片光合速率的降低不显著(4.7%),而蒸腾速率和气孔导度则明显降低,降幅分别达15.8%和15.4%,CDI处理略高的光合速率是以消耗更多的水分为代价;与CDI处理相比,APRI处理的马铃薯产量仅降低5.4%,但灌溉水量却节省了25.8%,使灌溉水分利用效率和总水分利用效率分别提高了27.5%和15.3%.对于马铃薯来说,根区交替地下滴灌是一种切实可行的节水灌溉技术.
Field experiments were carried out to study the effects of subsurface drip irrigation (APRI) on physiological indicators, yield and water use efficiency of potato.The results showed that in potato tuber growth period, compared with control treatment (CDI), APRI-treated potato The leaf photosynthetic rate was not significantly reduced (4.7%), while the transpiration rate and stomatal conductance decreased significantly by 15.8% and 15.4%, respectively. The slightly higher photosynthetic rate of CDI was at the expense of consuming more water. Compared with the CDI treatment, the APRI-treated potato output was reduced by only 5.4%, but irrigation water was saved by 25.8%, which increased irrigation water use efficiency and total water use efficiency by 27.5% and 15.3%, respectively. For potatoes, the root zone Alternate underground drip irrigation is a practical water-saving irrigation technology.