Abstract: Using potato Holland 15 as the material，two planting tests were carried out in 2019. Three fertilization rates were set as follows：F1（application rates of nitrogen，phosphorus and potassium fertilizers were 240 kg/ha，120 kg/ha and 300 kg/ha respectively），F2（application rates of nitrogen，phosphorus and potassium fertilizers were 180 kg/ha，90 kg/ha and 225 kg/ha respectively） and F3（application rates of nitrogen，phosphorus and potassium fertilizers were 120 kg/ha，60 kg/ha and 150 kg/ha respectively）.Three drip irrigation rates were set as follows：W1（100% potato water requirement），W2（80% potato water requirement）and W3（60% potato water requirement）. With 60% irrigation water requirement and no fertilization treatment as control（CK），the effects of drip irrigation and fertilization on the root layer soil nutrient content，yield and water use efficiency of potato were studied，so as to determine the drip irrigation and fertilization mode for high⁃quality and high⁃yield potatoes.The results showed that for the average of the two tests，the contents of nitrate nitrogen，available phosphorus and available potassium in 0—60 cm soil layer of W1F3 treatment were 72.72%，58.00% and 69. 33% higher than those of CK，while W1F1 treatment was the lowest；W1F1 treatment had the highest wateruse efficiency of 113.1 kg（/ ha·mm），which was 153.5% higher than CK；W1F1 treatment had the highest yield of 26 164 kg/ha，which was 136. 98% higher than CK.By considering comprehensively，the best combination of drip irrigation and fertilization for potato was W1F1.

Key words: Potato, Drip irrigation and fertilization, Soil available nutrients, Yield, Water use efficiency

摘要： 以马铃薯荷兰15号为材料，于2019年进行2次种植试验。设置F1（氮、磷、钾肥施用量分别为240、120、300 kg/hm²）、F2（氮、磷、钾肥施用量分别为180、90、225 kg/hm²）、F3（氮、磷、钾肥施用量分别为120、60、150 kg/hm²）3个施肥量，W1（100%马铃薯需水量）、W2（80%马铃薯需水量）、W3（60%马铃薯需水量）3个滴灌量，以灌溉60%马铃薯需水量和不施肥处理为对照（CK），研究滴灌施肥对马铃薯根层土壤养分含量、产量和水分利用效率的影响，以确定马铃薯优质高产的滴灌施肥模式。结果表明，对于2次试验平均值，W1F3处理0～60 cm土层的硝态氮、有效磷和速效钾含量均达最高，分别较CK提高72.72%、58.00%和69.33%，W1F1处理最低；W1F1处理马铃薯水分利用效率最高，为113.1 kg/(hm²·mm），较CK提高153.5%；W1F1处理产量最高，为26 164 kg/hm²，较CK提高136.98%。综合考虑，马铃薯滴灌施肥的最佳用量组合为W1F1。

关键词: 马铃薯, 滴灌施肥, 土壤速效养分, 产量, 水分利用效率