Daily Light Period Influences Pod Yield, Harvest Index, and Flowering of Peanut Grown in Nutrient Film Technique 2002-01-2488
‘Georgia Red’ peanut (Arachis hypogaea L.) was grown at 8-, 12-, 16-, and 20-h light [9.3, 18.6, 13.95, and 23.9 mol m-2 d-1 integrated photosynthetic photon flux (PPF)] /16, 12-, 8-, and 4-h dark cycles, respectively, to evaluate effects on pod and seed yield, flowering, harvest index (HI) and production efficiency, in response to duration and amount of daily lighting. Ten-day old peanut seedlings were transplanted into rectangular nutrient film technique troughs (0.15 × 0.15 × 1.2 m) and grown for 110 days. Growth chamber conditions were as follows: photosynthetic photon flux (PPF) mean of 332 μmol m −2 s −1, 28°C light/24°C dark cycle, and 70 ±5% relative humidity. The nutrient solution used was a modified half-Hoagland with pH and electrical conductivity maintained between 6.5-6.7, and 1000-1200 μS cm-1 respectively, and was replenished weekly. Foliage and pod fresh and dry weights and total seed yield increased with daily PPF up to 16-h (18.6 mol m-2 d−1) but declined at 20-h (23.5 mol m-2 d-1). Harvest index and production efficiency decreased with increased daily PPF. Flowering was delayed approximately 3 days as day length decreased while the cumulative number and rate of flowering increased substantially as daily PPF increased.
Citation: Mortley, D., Bonsi, C., Hill, W., and Morris, C., "Daily Light Period Influences Pod Yield, Harvest Index, and Flowering of Peanut Grown in Nutrient Film Technique," SAE Technical Paper 2002-01-2488, 2002, https://doi.org/10.4271/2002-01-2488. Download Citation
D. G. Mortley, C. K. Bonsi, W. A. Hill, C. E. Morris
Center for Food and Environmental Systems for Human Exploration of Space, G.W. Carver Agricultural Experiment Station, Tuskegee University
International Conference On Environmental Systems