Southern Research Station

Title: Hardwood Control Treatments to Enhance Natural Regeneration and Growth of Loblolly-Shortleaf Pines in an Uneven-Aged Stand: 12-Year Results

Author: Cain, Michael D.

Date: 1999

Source:  USDA, Paper presented at the Tenth Biennial Southern Silvicultural Research Conference, Shreveport, LA, February 16-18. 1999.

Description: To facilitate natural regeneration of loblolly (Pinus taeda L.) and shortleaf pines (P. echinata Mill.) in an overstocked, uneven-aged pine stand in southeastern Arkansas, hardwoods were controlled by either basal injection of Tordon® 101 R, soil application of Velpar® L, or rotary mowing followed by a broadcast spray of Tordon® 101 applied over the hardwood stubble. After hardwood control, an improvement cut reduced merchantable pine basal area from 97 to 70 ft² per acre, just before a better-than-average pine seed crop. Two subsequent improvement cuts in July 1987 and June 1991 left 55 and 48 ft² per acre, respectively, in merchantable pine basal area. Twelve years after hardwood control, all plots had an adequate density of pine regeneration for uneven-aged stands, but dominant pine regeneration on treated plots averaged 16 ft taller and 2.2 in. larger in groundline diameter than the dominants on untreated plots.

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Citation

Cain, Michael D.  1999.  Hardwood Control Treatments to Enhance Natural Regeneration and Growth of Loblolly-Shortleaf Pines in an Uneven-Aged Stand: 12-Year Results.   USDA, Paper presented at the Tenth Biennial Southern Silvicultural Research Conference, Shreveport, LA, February 16-18. 1999.