Growth parameters, maize (Zea mays L.) silage and bambara groundnut (Vigna subterranea L.) grain yield in an intercropping system.

M. Sc. Agric. University of KwaZulu-Natal, Pietermaritzburg 2015.Intercropping is practised throughout the tropics with a range of different crop combinations. As sustainable agriculture includes the enhancement and management of natural resources while meeting the human and animal needs for food/feed and fibre, intercropping has been shown to conserve resources and produce more nutritious food and feed. Therefore, intercropping can contribute to the complex livelihoods of African smallholder farmers by improving their returns on minimal inputs and producing more and quality food per land area. The aim of the study was to evaluate productivity and efficiency of intercropping maize and bambara groundnut, an underutilised legume crop, as alternative dual purpose crops with potential to feed both humans and livestock. Maize (ZM 305) and bambara groundnut landraces were planted in a randomised complete block design (RCBD) consisting of three replications. The experiment consisted of three treatment combinations [sole maize (M), sole bambara groundnut (BG) and maize + bambara groundnut intercrop (MBG)]. Seed quality of both maize and bambara groundnut was determined prior to planting to establish field planting value of seed lots. Data collection included plant growth (leaf number and plant height), physiology (chlorophyll content index and stomatal conductance) and yield and yield components. Intercrop productivity was evaluated using the land equivalent ratio (LER). Maize and bambara groundnut were further analysed for silage properties. The results showed that both maize and bambara groundnut seeds had high seed vigour and viability. There were no differences with respect to growth and physiological parameters of the two crop species. Significant differences (P