Abstract

SummaryThe influence of windbreak shading was investigated over the plant crop (P) and first ratoon (R1) cycle of bananas cv. Dwarf Cavendish, to quantify its effects on assimilation, phenology and yield in the subtropics. Plants growing under seasonal windbreak shading (late autumn to early spring) were compared with those growing under full sun but under similar windbreak protection. Windbreak shading reduced average photosynthetically active radiation (PAR) by 69%, which in turn reduced photosynthesis rate by 27%, transpiration rate by 38% and stomatal conductance by 40% compared with plants growing in full sun. Pseudostem temperature was 2.1 K lower on plants growing in shade. This led to a reduction in monthly leaf emergence rate and an extended cycle time. An additional extension to cycle time was caused by the extra 3.4 leaves produced before flowering on plants growing under windbreak shading. The decreased photosynthesis of leaves growing in shade was partially compensated for in the P cycle by a...

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