Late-season Forage Harvest Effects on Pod and Forage Components of Valencia Market Type Peanut
ABSTRACT Agricultural productivity per unit of land is a global concern. Moreover, farmers seek to add value to their enterprises. Interest has increased in harvesting Valencia market type peanut (Arachis hypogaea L. subsp. fastigiata var. fastigiata) for forage in food production systems. Trials at two sites near Brownfield, TX, USA, in 2012 and 2013, evaluated forage harvest timing [18, 20, 21, and 22 weeks after planting, (WAP), the last of which was sun-cured in the field from digging until threshing] on forage yield and nutritive value and pod yield of Valencia market type. Producers can harvest hay with greater nutritive value than stover by cutting and baling earlier during the pod maturation phase (about 18 WAP) although pod yield would be significantly (P < 0.05) reduced (2280, 2470, 2880, and 3450 kg pods/ha when forage was harvested 18, 20, 21, and 22 WAP, respectively, SEM = 90). Additionally, forage organic matter (OM) yield declined with each harvest after 18 WAP (3450, 2900, 2670, and 2460 kg OM/ha for forage harvested 18, 20, 21, and 22 WAP, respectively, SEM = 70). Crude protein (CP) concentration decreased across harvest dates from 158 to 124 g/kg and fiber fractions increased. Forage harvest prior to digging is not a viable option to add value to Valencia market type production because of reduced pod yield, which is the more valuable component. Other studies using different market types in other environments with earlier and similar harvest timings yielded similar results.