Growth, water and nutrient status of plants in relation to patterns of variations in concentrations of dry matter and nutrient elements in base-to-top leaves

Friis-Nielsen, Bodil

doi:10.1007/bf00264183

Plant Soil

1973

DOI: 10.1007/bf00264183

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Growth, water and nutrient status of plants in relation to patterns of variations in concentrations of dry matter and nutrient elements in base-to-top leaves

Bodil Friis-Nielsen¹

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1973

1981

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Cited by 6 publications

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Evaluation and control of the nutritional status of cereals

Nielsen

1976

Plant Soil

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Methods of quantitative diagnosis of the nutritional status of the young plant and quantitative prognosis of final yield were based on preliminary models constructed by using selected results ('pure'-effect data) from pot experiments with oats and spring wheat. The bases of the models -a fixed dry matter weight level of aerial parts of the plant and absolute and relative reference values -and the procedure by using the models were tested by relationships between predicted and obtained final yields. Highly significant correlation coefficients > 0.9 (p < 0.001) were found.

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Evaluation and control of the nutritional status of cereals

Nielsen

1976

Plant Soil

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Evaluation and control of the nutritional status of cereals

Nielsen

Friis-Nielsen

1976

Plant Soil

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Dry matter weight level (DMw-level) was selected and tested' as a parameter for stage of plant development and as a basis for nutrient concentrations in plants by using results from pot experiments with cereals.The use of nutrient concentrations based on fixed DMw-levels resulted in clear and reproducible relationships between 1) grain yield and concentrations of various nutrients in the young plant, and 2) concentrations of various nutrients and concentration of a given nutrient in the young plant. Fixed DMw-level as expression of stage of plant development and as basis of nutrient concentrations constitutes a sound foundation for interpreting the nutritional status of plants. I N T R O D U C T I O N Already in the beginning of the 19th century relationships were shown to exist between s u p p l y of nutrients, chemical composition of plants and final yield 7 9, and a t t e m p t s h a v e been m a d e from the days of H e l l r i e g e l 6 to develop useful m e t h o d s for evaluating (diagnosis) and controlling (therapy) the nutritional status of cereals based on their chemical composition. None of the suggested m e t h o d s have, however, p r o v e d satisfactory and the aim has thus as yet not been achieved. A review of the relevant literature s revealed t h a t difficulties in interpreting results of chemical plant analyses are connected with

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