Bagras (Eucalyptus deglupta Blume) and maize (Zea mays L.) above-ground interactions in alley cropping system at Claveria, Misamis Oriental, Mindanao, Philippines
2006
Abas, E.L.
The study was conducted to examine the above-ground interaction of 7-year old bagras (Eucalyptus deglupta Blume) and maize (Zea mays L.) in an alley cropping system. A randomized complete block design (RCBD) was followed replicated twice. The experimental treatments include a sole maize control and as inter crop under 1x3 m and 1x9 m hedgerow spacing. The results showed that height and diameter breast height (DBH) increment of bagras were not significantly different in the 9m and 3m hedgerow spacing. Trees under 9m spacing had wider canopy extension although the relative canopy density (RCD) was lower. Canopy openness was not significantly different between the two hedgerow treatments. Photosynthetically active radiation (PAR) availability was significantly lower under the hedgerow treatments compared to the control. Moreover, the hedgerow alley was observed to have consistently lower PAR near the hedges compared to the center of the alley. Maize agronomic performance (height, number of leaves, leaf area (LA), leaf area index (LAI). dry biomass, and grain yield) across cropping season was consistently lower under hedgerow system than in the sole maize treatment. Variability in maize yield across the alley was also observed under the hedgerow treatments which followed a dome-shape pattern. Maize performance was significantly poor in the lower row (LR) and upper row (UR) near the hedges. This was attributed to the imbalance in the distribution of PAR across the alley due to the bagras hedgerow.
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