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为给云南地区非豆科/豆科作物合理间作种植提供理论依据，通过田间小区试验，研究了N⁰、 N_112.5、N²²⁵和 N_337.5 4个施氮水平（0、112.5、225和337.5 kg N·hm_-2）下大麦/蚕豆间作作物产量及氮素养分吸收累积的特点及差异。结果表明，大麦/蚕豆间作具有间作产量优势，4个施氮水平中N²²⁵的土地当量比最高，达到1.13。不同施氮水平下间作大麦产量表现出第一行>第二行>第三行的趋势。与单作相比，间作大麦地上部和地下部氮含量平均提高5.8%~35.8%，地上部氮素累积吸收量及吸收速率提高7%~32.1%。在N⁰、 N_112.5、 N²²⁵水平下，氮含量、氮素累积吸收量及吸收速率均呈间作第一行>间作第三行>单作的趋势。单作大麦氮素累积吸收量和吸收速率以N_337.5水平最高，分别为95.46 kg·hm_-2和1.736 kg·hm_-2·d_-1，而间作大麦则以N²²⁵水平最高，分别为105.03 kg·hm_-2和1.910 kg·hm_-2·d_-1。

英文摘要:

Barley and fababean intercropping system is one of the main planting patterns in Yunnan province. Field experiment was carried out to study the effects of various N levels on intercropping yields, and N absorption and accumulation in barley. The results showed that yields advantage of intercropping existed in barely and faba bean intercropping system with LER of 1.13 when N level was N²²⁵, and LER of 0.92，0.99 and 0.91 when N level was N⁰, N_112.5 and N_337.5, respectively. The yield trend of intercropped barley at different rows was as the 1st row>2nd row>3rd row. Intercropping improved the content, accumulation and absorption rate of N in barley by 5.8%~35.8%, 7%~32.1%, respectively compared with mono crop. The trend of content, accumulation and absorption rate of N in barley at different rows was as the 1st row>2nd row>3rd row at the N levels of N⁰, N_112.5 and N²²⁵.The maximum value of accumulation rate and absorption rate of N in mono cropped barley occurred at N_337.5, with 95.46 kg·hm_-2 and 1.736 kg·hm_-2·d_-1, respectively. While the maximum value of accumulation rate and absorption rate of N in intercropped barely occurred at N²²⁵ with 105.03 kg·hm_-2, 1.91 kg·hm_-2·d_-1 , respectively.

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