SPACE DISTRIBUTION OF GUAJILLO (Acacia berlandieri Benth), STRUCTURE AND ASSOCIATED ARBUSTIVES IN TWO AGOSTADERO RANCHES IN NORTHERN COAHUILA

• DOI: https://doi.org/10.22533/at.ed.9734142411110

• Palavras-chave: Guajillo, distribución espacial, estructura y asociación

• Keywords: Guajillo, spatial distribution, structure and association.

• Abstract:

  -In order to determine the spatial distribution pattern of guajillo, its structure and relationship by age and height, and to define its association with other shrubs, the present study was carried out in two pasture ranches in northern Coahuila. Based on the results, guajillo in the two ranches is distributed in an aggregated form, being higher in Rancho "Coahuila" with block size 64 (block size 1 = 3 m²) and 32 (block size 1 = 4 m²) in Rancho "La Salada", under plot size of 192 m² and 128 m², respectively. Density was higher at the first ranch than at the second (3.49 m² plants vs. 1.56 m² plants), respectively. In both, the large (76 - 100 cm) and medium (51 - 75 cm) plant classes dominated (33.9, 24.7% and 27.11, 26.22%). There is a positive and significant relationship (P < 0.05, 0.17) of small plants (26 - 50 cm in height) with very large plants (> 100 cm) and medium plants (51 - 75 cm) in Rancho "Coahuila" and likewise in Rancho "La Salada" with levels (P < 0.03 and 0.20). Guajillo in Rancho Coahuila does not depend (X²t 0.05) on cenizo, quebradora, guayacán and cabellito for its distribution, but not in Rancho "La Salada", with which it is positively associated, except with cabellito. It is concluded that guajillo presents a pattern of spatial distribution aggregated to a greater and lesser degree, possibly due to differences in density, soil conditions and grazing. The sampling unit at Rancho "Coahuila" and "La Salada" is 3m x 4m and 4m x 4m, respectively. Very large and medium sized plants are the target in cases of guajillo control.