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Relationship between nitrogen status of leaves and nitrogenous components in various organs in adult satsuma mandarin trees citrus unshiu



Relationship between nitrogen status of leaves and nitrogenous components in various organs in adult satsuma mandarin trees citrus unshiu



Bulletin of the Shikoku National Agricultural Experiment Station (46): 1-10



Whether arginine or asparagine is a better advisory index than total N content of leaves was investigated. Relationships between several N compounds in various organs and total N concentration in leaves of 22-year-old satsuma mandarin trees (C. unshiu Marc.) receiving different rates of N fertilizer were examined. Total N concentration in leaves showed an increasing tendency with increasing N fertilizer application up to 223g N/tree/year and remained at a saturated N level when given over 223g N. Arginine content in leaves and 2-3-year-old stem sections and asparagine content in young fruit harvested in late June showed wide ranges of distribution and increased in a concave fashion with increases of N content of leaves. These suggest that these compounds are better diagnostic indice to evaluate the N levels of trees than total N content of leaves.

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Accession: 006297850

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Relationship between nitrogen status of leaves and nitrogen components in various organs in adult Satsuma mandarin trees. Shikoku Nogyo Shikenjo hokoku = Bulletin of the Shikoku National Agricultural Experiment Station: (46) 1-9, 1986

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