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Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 525753
Title Effect of nitrogen dressings on growth and development of sugar-beet
Author(s) Houba, V.J.G.
Source Wageningen University. Promotor(en): A.C. Schuffelen; L.J.P. Kupers. - Wageningen : Pudoc - ISBN 9789022004357 - 65
Department(s) Sub-department of Soil Quality
Publication type Dissertation, internally prepared
Publication year 1973
Keyword(s) beta vulgaris - chemische analyse - chemische samenstelling - groei - stikstof - planten - suikerbieten - oogsttoename - oogstverliezen - opbrengsten - blootstelling - milieuafbraak - kinetica - metabolisme - ecotoxicologie - beta vulgaris - chemical analysis - chemical composition - growth - nitrogen - plants - sugarbeet - yield increases - yield losses - yields - exposure - environmental degradation - kinetics - metabolism - ecotoxicology
Categories Fertilizers, Fertilizer Application
Abstract

The growth and development of sugar-beet with different nitrogen dressings was studied by measurement of leaf area and of dry weight and chemical composition (inorganic cations and anions) of several plant parts during the growth season.

For a correct interpretation of the data, the losses in dry weight, leaf area and minerals due to leaf fall could not be ignored and were therefore estimated. The losses were calculated to be 4-5 tons dry matter . ha -1and 3-4 m 2leaf area . m -2soil area depending on the amount of nitrogen dressed. The losses of N, H 2 PO 4 and K were 90-140, 5-13 and 80-105 kg . ha -1, respectively.

When the losses were included in the harvest data, other growth and uptake figures were obtained than when these losses were ignored. With no deficiency, instead of three growth stages, only two stages appeared in the distribution curve.

Furthermore a hypothesis was developed which could explain the differences in dry weight, chemical composition and leaf area of the succeeding laminae of a sugar-beet plant. It was suggested that the laminae formed first stayed small due to competition for the produced minerals within the plant. Maximum leaf area and weight was found for the 10th to l5th leaf. Later formed laminae stayed small due to the shortage of light, minerals, water and time.

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