Common vetch (Vicia sativa L.)-oat (Avena sativa L.) intercropping is widely used for forage production, especially in alpine regions. To understand the effects of row configuration on radiation interception and productivity in common vetch-oat strip intercropping under low-input conditions, a field experiment with seven treatments of different numbers of rows for common vetch and oat [1:1 (RI), 2:1 (S21), 3:1 (S31), 3:2 (S32), 4:2 (S42), 4:3 (S43), and 5:3 (S53)] and sole cropping treatments were conducted in the eastern Qinghai-Tibetan plateau (QTP) during 2016 and 2017. Compared with sole cropping, intercropping significantly increased plant height but decreased the net photosynthetic rate (Pn) and the fraction of intercepted photosynthetically active radiation (ƒIPAR) of common vetch in the configurations with narrow strip width such as RI, S21, S31, and S32; as the common vetch strip width increased, their performance tended to be similar with common vetch sole cropping. Plant height, Pn, and ƒIPAR were significantly greater for intercropped oat than oat sole cropping, but decreased as the width of the oat strip increased. On average, intercropping systems improved radiation use efficiency (RUE) by 27 % in comparison to the value expected from the monocultures. The land equivalent ratio (LER) was 1.20 (flowering stage) and 1.14 (maturity stage) on average, and greater than one in all intercropping treatments. Moreover, oat yield in border rows was significantly higher by 41–52 % compared with inner rows, indicating that the border row effect of the dominate crop is a key to increasing yield in common vetch-oat strip intercropping. In order to maximize the utilization of the border row effect, one row or two rows of oat strip which can mitigate intraspecific competition is recommended under low-input conditions. The optimal row configurations RI and S32, which achieved the highest RUE (2.9–3.4 g MJ⁻¹), LER (1.16–1.27), yield (1257−1502 g m^-2), and monetary advantage index, can be applied in common vetch-oat strip intercropping for sustainable forage production in alpine regions.

普通紫v（Vicia sativa L。）-燕麦（Avena sativa间作套种广泛用于牧草生产，特别是在高山地区。为了了解低输入条件下普通configuration藜燕麦间作中行配置对辐射截留和生产力的影响，对普通experiment藜和燕麦进行了七种不同行数的处理的田间试验[1：1（RI），2 1：1（S21），3：1（S31），3：2（S32），4：2（S42），4：3（S43）和5：3（S53）]，并且在青藏高原东部（QTP）在2016年和2017年之间。与单一种植相比，间作显着增加了株高，但降低了普通紫v的净光合速率（Pn）和截获的光合有效辐射（ƒIPAR）的比例。窄带宽度，例如RI，S21，S31和S32；随着普通紫etch条宽度的增加，它们的性能往往与普通紫etch唯一的裁剪相似。间作燕麦的作物高度，Pn和ƒIPAR明显高于单独种植的燕麦，但随着燕麦条宽度的增加而降低。与单一栽培相比，间作系统平均将辐射利用效率（RUE）提高了27％。土地当量比（LER）平均为1.20（开花期）和1.14（成熟期），在所有间作处理中均大于1。此外，与内行相比，边境行的燕麦产量显着提高了41–52％，这表明主要作物的边境行效应是普通紫etch麦带间作提高产量的关键。为了最大程度地利用边界行效应，在低投入条件下，建议使用一排或两排燕麦条，可减轻种内竞争。最佳行配置RI和S32，实现了最高的RUE（2.9–3.4 g MJ^-1），LER（1.16-1.27），产量（1257−1502 gm ^-2）和货币优势指数可用于常见的紫v麦条间作，以实现高山地区可持续的牧草生产。