采用田间小区试验,通过2行玉米间作2行马铃薯、4行玉米间作4行马铃薯及相应单作试验,在玉米拔节期和大喇叭口期比较植株氮磷钾浓度和养分吸收量,研究玉米间作马铃薯中养分吸收和肥料利用效率的变化。结果表明,玉米大喇叭口期,间作玉米植株氮钾浓度显著低于单作(F_氮=6.608,P_氮=0.015;F_钾=5.148,P_钾=0.028),且根、茎、叶中氮磷钾浓度都低于单作处理,部分差异达到了显著水平,根对氮和磷的利用贡献大一些,茎对钾的利用贡献大。间作玉米的养分吸收量没有优势,但间作玉米单株产量极显著高于单作,产量与玉米大喇叭口期植株氮钾浓度极显著和显著负相关,表明提高玉米氮钾利用效率可促进增产。 Field experiments were conducted in two rows of maize intercropping pots of 2 rows and 4 rows of intercropping pots with 4 rows of potatoes and the corresponding single-cropping experiments. The plant N, P and K concentrations and nutrient uptake were compared at the jointing and bolls stages of maize. Changes of nutrient absorption and fertilizer use efficiency in potato. The results showed that the concentrations of nitrogen and potassium in intercropping maize were significantly lower than those in monoculture (F_N = 6.608, P_N = 0.015; F_K = 5.148, P_K_2O_0.028) , The concentrations of N, P and K in leaves were lower than that of single treatment, some of the differences reached significant levels, and the contribution of nitrogen and phosphorus to roots was larger, while stems contributed more to the utilization of potassium. The yield of intercrop corn had no significant advantage, but the intercropping corn yield was significantly higher than that of monocropping. The yield was significantly and significantly negatively correlated with the concentration of nitrogen and potassium in the plant with big bell trumpet, which indicated that increasing the N and K utilization efficiency could promote the yield increase .