ISSN:
1573-5036
Keywords:
Chemical composition
;
Diagnosis
;
Grain
;
Nutritional status
;
Oats
;
Prognosis
;
Pureeffect
;
Spring wheat
;
Steenbjerg-effect
;
Straw
;
Therapy
;
Trophogenesis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Based on grain yield and the chemical composition of grain and straw at maturity, a quantitative method of estimating the nutritional status of the young plant and the corresponding nutritional conditions of the growth medium was developed from results of three years' of factorial fertilizer pot experiments with oats and spring wheat. In trophogenetic methods, yield and chemical composition of older plants form the basis for the conclusion on soil fertility at sowing time with the aim to decide on future fertilizer policy. Contrary to earlier trophogenetic methods, the present method includes the nutritional status of the young plant—based on a well-defined stage of development (DMw-level) and pure-effect concentrations of nutrients—as an intermediate link in the above conclusion. The method follows the reversed direction of procedures based on the models used for diagnosis and prognosis of grain yield and chemical composition of plant parts at maturity previously outlined. The reliability of the method was proved by comparing trophogenetically determined and experimentally obtained nutrient concentrations in the young plant. The coefficients of regression and correlation were both close to 1, and the latter was highly significant. Together with the methods of diagnosis, prognosis and therapy, trophogenesis completes the framework enclosing all possibilities of using the plant analysis in evaluation and control of the nutritional status of the plant.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02182706
