A dormancy extension technique for biotechnical streambank stabilization in warm regions

Researchers identified four challenges to applying biotechnical streambank stabilization in warm regions. These challenges are strongly correlated to plant dormancy and planting period. Prompted by these challenges, researchers investigated the applicability of using the cold storage method to extend the dormant condition of live black willow (Salix nigra) cuttings for later planting. Black willow cuttings were harvested in February 2001 and stored in a refrigerator at 4.4 °C (40 °F). These cold-stored cuttings had survival rates of 81.3, 43.6, and 43.8% when they were planted in the field in March, April, and May 2001, respectively. These rates are considered satisfactory in biotechnical engineering. A cost analysis suggests that using cold storage in field conditions is feasible.