engleski

Shading effect on crop yields in intercropped systems of walnut and agricultural crops

The aim of the research is to investigate the shading effect in intercropped systems of walnut orchard and agricultural crops and its effect on crop yields. The field trial consisted of three plots - control plot of wheat without walnuts, walnut orchards with intercropped wheat and a walnut orchard without intercropped wheat. The solar radiation was measured in canopy shade and direct sunlight (middle of the alley) during the clear days without clouds. Crop yields were determined at the harvest. There was a significant difference in solar radiation throughout a vegetation period, in canopy shade as well as in direct sunlight. The yield results of both crops (winter wheat and buckwheat) have shown statistically lower yields in intercropped orchard compared to control plot. However, the winter wheat, whose vegetation period does not overlap with the walnut vegetation period, had only 11% reduction in yield while buckwheat whose vegetation was overlapping with walnut had 28% yield reduction in intercropped walnut orchard. Such findings confirm the importance of light on crops performance.

buckwheat; tree canopy; solar radiation; yield, wheat

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