BOSQUE 16(2): 91-99, 1995

ARTICULOS

Influencia de la compactación producida durante la tala rasa sobre la productividad del segundo ciclo de Pinus taeda L.

Influence of soil compaction produced during clearcutting on the productivity of second-cycle growth of Pinus taeda L.

C.D.O.: 114.11; 232.216.

ROBERTO FERNANDEZ, JORGE FAHLER, HUGO FASSOLA, NORBERTO PAHR, ANA LUPI

Facultad de Ciencias Forestales, Universidad Nacional de Misiones, Casilla 3382, Eldorado, Misiones, Argentina.

SUMMARY

In order to better understand the relationship between tree growth and soil compaction, the growth of Pinus taeda planted in 1990 was evaluated considering the different degrees of soil compaction and the different practices of soil preparation previous to planting, where the previous harvest was performed with a high degree of mechanization. Tree growth was recorded by diameter, height, and volume, with measurements obtained five times between 15 and 47 months after planting, with the following conclusions:
1.   Tree growth on sectors with less soil compaction was greater than in the sector with more soil compaction, independent of the way in which the soil was prepared before planting, and
2.   Tree growth on sector where the soil was prepared with heavy raking prior to planting was greater than on sectors that received no soil preparation prior to planting, independent of the degree of soil compaction.

RESUMEN

Con el objetivo de realizar un diagnóstico que permitiera caracterizar el problema, crecimiento versus compactación, se evaluó el crecimiento de Pinus taeda, implantado en 1990, en relación a diferentes condiciones de compactación y de preparación del terreno, en un sitio en el cual se aplicó una tala rasa altamente mecanizada.
A partir de los resultados obtenidos en las cuatro mediciones efectuadas, entre los 15 y 47 meses desde la plantación, y correspondientes al comportamiento del diámetro, altura y volumen, se concluye que:
1.   el crecimiento observado en las franjas menos compactadas resultó mayor que el registrado en las más compactadas, independientemente de la modalidad de preparación del terreno, y que,
2.   el crecimiento registrado en áreas de terreno preparado con rastra pesada resultó superior al observado en áreas de plantación directa, independientemente del nivel de compactación.

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Recibido: 31.7.95