摘要：Mining presents challenges in revegetation efforts, particularlyon exposed overburden. New Mexico locust (Robinianeomexicana Gray) has long been considered a good candidatefor mine reclamation in the Southwestern United States,although little published data exists. Scarified New Mexicolocust seeds were hydroseeded onto mining overburdenscreened to < 15 cm (6 in). Emergence was evaluated duringthe latter part of one field season using a blocked, split-plotdesign with the whole-plot factor of three mulch treatments(0, 1,121, or 2,242 kg/ha [0, 1,001, or 2,002 lb/ac]) and thesplit-plot factor of three composted, biosolid treatments(0.0, 112.5, or 225.0 Mg/ha [0.0, 50.2, or 100.4 ton/ac]).No differences were evident in emergence among mulchand biosolid treatment combinations. A higher number ofemergents were observed in locations shaded by rocks than inopen areas, and a higher percentage of seedlings that emergedfrom the protected areas were observed to survive than thosethat emerged in open areas. Future studies are required toconfirm whether rock cover is beneficial to seed emergenceand survival whereas organic amendments, incorporated orsurface applied, had no effect at the rates applied.
