Changes in Chemical Composition of Australian Waxflowers Due to Soil Applications of Nitrogen and Assessment of Nitrogen Status by Tissue Analysis

Autor:	N. A. Maier, W. L. Chvyl
Rok vydání:	2003
Předmět:	biology Physiology Ammonium nitrate chemistry.chemical_element Growing season biology.organism_classification Nitrogen chemistry.chemical_compound Nutrient chemistry Agronomy Chamelaucium uncinatum Cultivar Chamelaucium Agronomy and Crop Science Chemical composition
Zdroj:	Journal of Plant Nutrition. 26:2321-2341
ISSN:	1532-4087 0190-4167
DOI:	10.1081/pln-120025463
Popis:	Three field experiments were conducted to investigate the effects of soil‐applied nitrogen (N) on plant chemical composition, nutrient removal, and the use of plant analysis to assess N status of Australian waxflowers. Experiments were conducted in commercial plantings of Chamelaucium uncinatum cultivar Alba and a Chamelaucium hybrid (C. floriferum × C. uncinatum) known locally as Walpole wax, at 3 sites in South Australia. Nitrogen, as ammonium nitrate, was applied at rates up to 160 g plant−1 over several side dressings during the growing season. To assess plant nutrient status, stem tips (25–40 mm long tips of stems) were sampled during the growing season and whole stems at harvest. Nitrogen concentration in both stem tips and whole stems was sensitive to variations in N supply; however, the magnitude of the effect varied between sampling times and sites. In stem tips sampled during spring, the increase in N concentrations ranged from 19.8% at site 2 to 74.6% at site 1. Nitrogen concentrations...
Databáze:	OpenAIRE
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