Common vetch cultivars improve yield of oat row intercropping on the Qinghai-Tibetan plateau by optimizing photosynthetic performance

Sustainable development of livestock production is challenged by the shortage of forage resources on the Qinghai-Tibetan plateau (QTP). Common vetch-oat intercropping is used on the QTP and in other alpine regions to obtain substantial forage yield, but few common vetch cultivars have been evaluated in intercropping systems. A three-year field experiment in the eastern QTP was carried out to compare plant growth, photosynthetic rate (Pn),...