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- Author or Editor: Randy M. Beaudry x
Abstract
The respiratory rates of nuts of 19 pecan [Carya illinoensis (Wang) K. Koch] genotypes were determined with and without shells; at harvest moisture and at 3% kernel moisture. Shell respiration also was determined. Respiratory rates of kernels and intact nuts varied logarithmically with moisture content of the kernel. Respiratory rates of kernels at harvest ranged from 26.9 to 0.3 mg CO2kg-1hr-1; after drying to 3% moisture, values declined, ranging from 0.21 to 0.06 mg CO2kg-1hr-1. Respiration also was genotype dependent and was influenced by shell presence. The respiration rate of unshelled nuts was greater than shelled kernels when the moisture level was high, but lower when the kernel moisture level was low. Shell material was found to respire to a limited extent.