Superabsorbent Polymer Use in Rangeland Restoration: Glasshouse Trials

Post-disturbance rangeland restoration efforts are often thwarted due to soil moisture deficits. Superabsorbent polymers (SAPs) absorb hundreds of times their weight in water, increasing when the SAP is mixed with soil. The objective this study was evaluate banded SAPs under surface increase plant available water and thus seedling establishment for perennial species during efforts. Five glasshouse experiments two grass species, bottlebrush squirreltail (Elymus elymoides) or Siberian wheatgrass (Agropyron fragile), were conducted. Treatments varied, including rates ranging from 11–3000 kg ha−1 placement mostly at depths extending up a 15 cm depth. Generally, increased all 49 days. However, ≥ 750 caused swell crack, potentially hastening drying later season. Seedling longevity 12 days, especially high band rate 3000 8 deep. Further work needed verify field, ascertain conditions reduce displacement, benefits across species.