Restoration of Native Shrub/Grass Plant Communities on Xeric Saltcedar Infestation Sites Kenneth D. Lair and Sarah L. Wynn Technical Service Center, Bureau of Reclamation, Denver

ARS APHIS NRCS (PMC) Saltcedar Biological Control Consortium _________________________________

San Marcial Project Site Saltcedar Revegetation Research Sites San Marcial, 2002 Cibola, 2003 BBNP, 2004 Monotypic Tamarix ramosissima Carlsbad, 2004

Lower Rio Grande: Big Bend National Park (NPS) Big Bend Ranch State Park (TP&W) Canon de Santa Elena Protected Area, Mexico Maderas del Carmen Protected Area, Mexico Tamarix ramosissima Arundo donax Prosopis spp. Acacia spp.

Mycorrhizal presence = 0 Texture = SCL, CL EC = range , µ = 16 mmhos cm -1 SAR = range , µ = 19 meq L -1 pH = 8.4 OM = 1.1% NO 3 -N = 1.7 ppm P = 15.2 ppm K = 618 ppm

Mycorrhizal presence = 0 Texture = SCL, CL EC = range , µ = 16 mmhos cm -1 SAR = range , µ = 19 meq L -1 pH = 8.4 OM = 1.1% NO 3 -N = 1.7 ppm P = 15.2 ppm K = 618 ppm

Broadcast seeding of four custom seed mixtures + mycorrhizal inoculation + soil nitrogen manipulation Mid-July 2002

SUMMARY OF PRELIMINARY RESULTS (1 st Year Data, 2002) BOCU No difference in frequency, density between treatments (1 st year emergence) Emerged plants cm, vigorous 1 st year seed production Positive mycorrhizal response (both plant frequency and density) Granular and seed coating Mycoapply® inoculation resulted in 1.5-2X frequency and density compared to no mycorrhizae No difference between granular and seed coating inoculum