The mechanical properties of lettuce: A comparison of some agronomic and postharvest effects

Autor:	S. C. Clifford, A.C. Smith, H. W. Hilton, J. M. Newman
Rok vydání:	2005
Předmět:	Horticulture Materials science chemistry Mechanics of Materials Mechanical Engineering Failure strain Turgor pressure Postharvest food and beverages chemistry.chemical_element General Materials Science Nitrogen Iceberg lettuce
Zdroj:	Journal of Materials Science. 40:1101-1104
ISSN:	1573-4803 0022-2461
DOI:	10.1007/s10853-005-6923-3
Popis:	Mechanical properties data of Iceberg lettuce leaves are described in relation to the applied agronomic variables and post-harvest treatment. Leaf tissue strength and stiffness were both reduced significantly in plants grown with 120 kg/ha applied nitrogen compared with plants grown with 0 kg/ha applied nitrogen. Leaf tissue strength and stiffness were increased significantly in plants grown with added calcium at 80 kg/ha. Significant reductions in stiffness and increases in failure strain were associated with reduced hydration. These findings show that agronomy changes in mechanical properties are as large as maturity and post harvest induced turgor changes, which has implications for both quality and damage of cut salads.
Databáze:	OpenAIRE
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