The influence of living plants on denitrification

J.W. Woldendorp

The influence of living plants on denitrification

J.W. Woldendorp

Research output: Thesis › internal PhD, WU

Abstract

A study was made of the N cycle in permanent pastures. Between 10 and 40 % was lost when labelled NO ₃ -, was added. The losses by denitrification were stimulated by living roots, which decreased the O ₂ level in the rhizosphere and excreted organic compounds which could act as hydrogen donors during NO ₃ - reduction. Experiments with sterile plants demonstrated that Pseudomonas and Achromobacter species could use the root's excretory products as hydrogen donors. Bacillus licheniformis and some other B.spp., which could denitrify in pure culture, could not utilize these compounds. Amino acids stimulated denitrification by Pseudomonas aeruginosa and the rate-limiting reduction from nitrate to nitrite.

B. licheniformis was not an obligate denitrifier; the presence of NO ₃ - was only indispensable and a high nitrate reductase activity was only found if glycerol was the hydrogen donor.

Conditions in the soil were not suitable for NO ₃ - reduction to NH by B. licheniformis.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	Wageningen University
Supervisors/Advisors	Mulder, E.G., Promotor, External person
Award date	11 Dec 1963
Place of Publication	Wageningen
Publisher	Veenman
Publication status	Published - 1963
Externally published	Yes

Keywords

soil science
denitrification
grasslands
assimilation
nitrogen
plant nutrition
fertilizers
manures
cum laude

Access to Document

https://edepot.wur.nl/185152

Cite this

@phdthesis{4c2e30fd776c49e09e22000c71119665,

title = "The influence of living plants on denitrification",

abstract = "A study was made of the N cycle in permanent pastures. Between 10 and 40 % was lost when labelled NO 3 -, was added. The losses by denitrification were stimulated by living roots, which decreased the O 2 level in the rhizosphere and excreted organic compounds which could act as hydrogen donors during NO 3 - reduction. Experiments with sterile plants demonstrated that Pseudomonas and Achromobacter species could use the root's excretory products as hydrogen donors. Bacillus licheniformis and some other B.spp., which could denitrify in pure culture, could not utilize these compounds. Amino acids stimulated denitrification by Pseudomonas aeruginosa and the rate-limiting reduction from nitrate to nitrite.B. licheniformis was not an obligate denitrifier; the presence of NO 3 - was only indispensable and a high nitrate reductase activity was only found if glycerol was the hydrogen donor.Conditions in the soil were not suitable for NO 3 - reduction to NH by B. licheniformis.",

keywords = "bodemkunde, denitrificatie, graslanden, assimilatie, stikstof, plantenvoeding, kunstmeststoffen, mest, soil science, denitrification, grasslands, assimilation, nitrogen, plant nutrition, fertilizers, manures, cum laude",

author = "J.W. Woldendorp",

note = "WU thesis 358 Proefschrift Wageningen",

year = "1963",

language = "English",

publisher = "Veenman",

school = "Wageningen University",

}

TY - THES

T1 - The influence of living plants on denitrification

AU - Woldendorp, J.W.

N1 - WU thesis 358 Proefschrift Wageningen

PY - 1963

Y1 - 1963

N2 - A study was made of the N cycle in permanent pastures. Between 10 and 40 % was lost when labelled NO 3 -, was added. The losses by denitrification were stimulated by living roots, which decreased the O 2 level in the rhizosphere and excreted organic compounds which could act as hydrogen donors during NO 3 - reduction. Experiments with sterile plants demonstrated that Pseudomonas and Achromobacter species could use the root's excretory products as hydrogen donors. Bacillus licheniformis and some other B.spp., which could denitrify in pure culture, could not utilize these compounds. Amino acids stimulated denitrification by Pseudomonas aeruginosa and the rate-limiting reduction from nitrate to nitrite.B. licheniformis was not an obligate denitrifier; the presence of NO 3 - was only indispensable and a high nitrate reductase activity was only found if glycerol was the hydrogen donor.Conditions in the soil were not suitable for NO 3 - reduction to NH by B. licheniformis.

AB - A study was made of the N cycle in permanent pastures. Between 10 and 40 % was lost when labelled NO 3 -, was added. The losses by denitrification were stimulated by living roots, which decreased the O 2 level in the rhizosphere and excreted organic compounds which could act as hydrogen donors during NO 3 - reduction. Experiments with sterile plants demonstrated that Pseudomonas and Achromobacter species could use the root's excretory products as hydrogen donors. Bacillus licheniformis and some other B.spp., which could denitrify in pure culture, could not utilize these compounds. Amino acids stimulated denitrification by Pseudomonas aeruginosa and the rate-limiting reduction from nitrate to nitrite.B. licheniformis was not an obligate denitrifier; the presence of NO 3 - was only indispensable and a high nitrate reductase activity was only found if glycerol was the hydrogen donor.Conditions in the soil were not suitable for NO 3 - reduction to NH by B. licheniformis.

KW - bodemkunde

KW - denitrificatie

KW - graslanden

KW - assimilatie

KW - stikstof

KW - plantenvoeding

KW - kunstmeststoffen

KW - mest

KW - soil science

KW - denitrification

KW - grasslands

KW - assimilation

KW - nitrogen

KW - plant nutrition

KW - fertilizers

KW - manures

KW - cum laude

M3 - internal PhD, WU

PB - Veenman

CY - Wageningen

ER -

The influence of living plants on denitrification

Abstract

Keywords

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