TITLE:
Initial Growth of Eucalyptus with Different Spatial Arrangements in Agrosilvopastoral Systems
AUTHORS:
Marina Alves Clemente, Marcos Vieira de Faria, Regina Maria Quintão Lana, Jose Geraldo Mageste, Carlos Juliano Brant Albuquerque
KEYWORDS:
ASPS, Productivity, Sustainability, Agrosilvipastoral System
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.8 No.6,
May
23,
2017
ABSTRACT: Success of integrating livestock farming with
forestry systems or SAF′s (Agroforestry Systems) highly depends on correct
chose of the tree component and the best spatial arrangement of plants, for
which eucalyptus has proven as an excellent option. Therefore, the objective of
this study was to evaluate eucalyptus wood yield under different spatial
arrangements in agrosilvipastoral system. The arrangements were: single rows 10
× 2 m, double rows (2 × 3) + 15 m
and (2 × 3) + 20 m
and triple rows (3 × 2 × 3) +20 m. Silvicultural evaluations (DBH, tree height,
tree volume and volume per hectare) were done eighteen months after experiment
installation. The experimental design was randomized blocks with six
repetitions and two trees per plot. Trees were arbitrarily identified in each
spatial arrangement, numbered from 1 to 5, totaling 30 plots in each system. The DBH increased as the alleys became closer to
each other, being higher in the10 × 2 m and (2 × 3) + 15 m systems; tree height
increased in denser spacing—10 × 2 m, (2 × 3) + 15 m and (3 × 2 × 3) + 20 m;
the volume of wood per plant and per hectare showed higher values in the 10 × 2
m and (2 × 3) + 15 m systems. The lowest yield was found in the system with the
least amount of trees, i.e. (2 × 3) +
20 m (576 trees/ha).