Abstract
Ibarra FFA, Martin RMH, Ramirez MF. Tec Pecu Mex 2004,42(1):1-16. This study was conducted to evaluate the response of buffelgrass [Cenchrus ciliaris (L.) Link] and grama china (Cathestecum brevifolium Swallen) to the application of ripping as a compaction reduction practice to rehabilitate old buffelgrass stands in regular condition at central Sonora, Mexico. Ripping was conducted by triplicate on 400 m-2 plots in June of 1995 by using a three-blade ripper. The experimental design used was a randomized complete block with two treatments (ripping and no ripping) and three replications. Evaluated variables were: density, basal cover, height, forage production and soil compaction, and were monitored from 1995 to 1999. Ripping increased (P<0.05) buffelgrass and grama china density 83 to 383 %, basal cover 105 to 373 %, height 85 to 86 % and forage production by 113 to 338 % as compared to control, and reduced (P<0.05) surface soil compaction between 27 and 61 % on ripped plots during a 5-year period. Ripped plots produced a total of 9.81 t ha-1 of cumulative additional forage as compared to untreated control. It is concluded that soil compaction significantly limits productivity in old buffelgrass pastures.
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