单 位：
中国科学院地理科学与资源研究所陆地水循环及地表过程重点实验室
关键词：
滴灌施肥灌溉;微咸水灌溉;土壤基质势;水分利用效率;灌溉水利用效率;肥料偏生产力
摘 要：
针对柴达木盆地马铃薯农业生产对水-肥-盐综合管理的需求,布置了5个滴灌施肥灌溉比例(施肥量分别为当地马铃薯施肥量的10%、30%、50%、70%、90%)的田间试验,试验通过控制滴头正下方20 cm处的土壤基质势下限高于-20 k Pa进行滴灌水盐调控和施肥灌溉。结果表明:在柴达木盆地、微咸水灌溉条件下,当滴头正下方20 cm深度土壤基质势控制在-20 k Pa以上,滴灌施肥灌溉阶段0~40 cm内土壤水分和盐分状况良好,但灌溉停止后土体中的盐分有增加的趋势;随着施肥比例的增加,马铃薯的株高、叶面积、地上生物量干质量及产量先增加再降低,当施肥比例为70%时达到最大。滴灌高频施肥灌溉且当施肥比例为当地马铃薯推荐施肥量的70%左右时,马铃薯既能获得高产,又可保证较高的水肥利用效率。
译 名：
Effects of Drip Fertigation with Saline Water on Potato Growth and Water and Fertilizer Use Efficiencies
作 者：
WAN Shuqin;WANG Ran;KANG Yaohu;LIU Shiping;FENG Zhiwen;Key Laboratory of Water Cycle and Related Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences;University of Chinese Academy of Sciences;
关键词：
drip-fertigation;;saline water irrigation;;soil matric potential;;water use efficiency;;irrigation water use efficiency;;partial factor productivity from applied fertilizer
摘 要：
For the water-fertilizer-salt integrated management of drip irrigation for potato agricultural production,a field experiment with five proportions of fertilizer applications(10%, 30%, 50%, 70% and 90% of the recommended fertilizer amount of local potato) under drip fertigation was conducted in Qaidam region. The soil matric potential at 20 cm depth under the emitters was controlled above-20 k Pa for the water-fertilizer-salt regulation.The results showed that the soil moisture and salinity in 0~40 cm depth were better in high- frequent irrigation stage for drip irrigation with saline water. However, when the irrigation stopped, the soil salinity tended to increase. With the increase of proportion of fertilizer application, plant height, leaf area, dry weight of aboveground biomass, and yield first increased and then decreased, and got the maximum when the proportion of fertilizer application was 70%. The high-frequency fertigation and the 70% of the recommended fertilizer amount of local potato were beneficial to obtain high potato yield and high water and fertilizer use efficiencies.
