Der Einfluß von Dicyandiamid und N‐Serve in Verbindung mit Ammoniumsulfat als N‐Dünger auf die Nitrat‐ und Oxalsäuregehalte von Spinat (Spinacia oleracea)

Kick, H.; Massen, G. G.

doi:10.1002/jpln.19731350306

Cited by 14 publications

(4 citation statements)

References 5 publications

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“…a) DCD-amended N-fertilizers, e.g. ammonium sulfate (,,Alzon 22") or urea (,,Alzon 47") with 10 ?6 of total N in form of DCD make it possible to supply nitrogen in form of NH4 to crop plants for a certain time and to reduce nitrate and oxalate contents of vegetables and feed crops ( Kick andMassen 1973, Vilsmeier and.…”

Section: Use Of Dcd-amended Inorganic Fertilizersmentioning

confidence: 99%

Potentials of nitrification inhibitors in modern N‐fertilizer management

Amberger

1986

J Plant Nutrition & Soil

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ZusammenfassungModern agricultural practices require a new concept of N-fertilizer management in order to optimize N-utilization and avoid N-losses. Nitrification inhibitors or ,,N-stabilizers" fit very good into this conception.Dicyandiamide (DCD) is an efficient nitrification inhibitor and blocks the first step of nitrification for 1-3 months (depending on temperature). This effect is bacteriostatic (not bactericidal) and does not affect other (esp. C-heterotrophic) soil microorganisms (,,biological activity"). DCD is a non-toxic, water soluble compound and will be degraded to COz, NH3 and H2O without any residues.There are various possibilities to use DCD: addition to liquid manure temporarily prevents oxidation of ammonium nitrogen e.g. of slurry or waste water from potato starch production.In combination with inorganic fertilizers like ammonium sulfate or urea (with 10 % of total-N) it enables the farmer to control NH4-supply to crop plants in certain stages of growth and to gain certain operational advantages by less frequently split applications of N especially on sand and rendzina soils.Thus, the systematic use of nitrification inhibitors not only represents a progress in agricultural technique but also helps to substantially reduce risks concerning pollution of surface and ground waters that are sometimes inevitable consequences of agricultural production. M6glichkeiten von Nitriflkationshemmatoffen in der modernen StickstoffdiingungModerne Landbewirtschaftungsmethoden erfordern ein neues Dungungskonzept rnit dem Ziel, die Stickstoffausnutzung zu optimieren und N-Verluste zu verhindern. Nitrifikationshemmstoffe oder ,,N-Stabilisatoren" passen gut in dieses Konzept. Dicyandiamid (DCD) ist ein wirksamer Nitrifikationshemmstoff; er blockiert den ersten Schritt der Nitrifikation fiir die Dauer von 1-3 Monaten (je nach Temperatur). Dieser Effekt ist bakteriostatisch (nicht bakterizid) und beeintrachtigt nicht andere (vor allem C-heterotrophe) Bodenorganismen (,,biologische Aktivitat"). DCD ist eine nicht toxische, wasserlasliche Verbindung, die letztlich zu C02, NH3 und HzO abgebaut wird ohne Ruckstande. Es gibt verschiedene Moglichkeiten ftir den Einsatz von DCD:Giille oder Abwasser aus der Kartoffelstlrkeproduktion (,,Kartoffelfruchtwasser") zugesetzt, verhindert es die Oxidation des Ammoniumstickstoffs fur eine gewisse Zeit.In Kombination mit anorganischen Diingemitteln wie Ammoniumsulfat oder Hamstoff (mit 10% vom Ges.-N) ist es moglich, die NHrN-Anlieferung zu Kulturpflanzen in bestimmten Entwicklungsabschnitten zu regulieren. Damit verbunden sind gewisse arbeitswirtschaftliche Vorteile gegeniiber iiblichen mehreren Teilgaben mit mineralischem Stickstoff vor allem auf Sanden und Rendzina-Boden. CW4-3263/861040%@%9 $ 02.50/0 0 VCH Verlagsgcsellnehaft mbH, D-6940 Wcinheim, 1986 470 Amberger Z. Pflanzenernaehr. Bodenk. Die Anwendung von Nitrifikationshemmstoffen stellt somit nicht nur einen Fortschritt dar in agrotechnischer Hinsicht , sondern tragt auch wesentlich dazu bei, mogliche Risiken einer Belastung...

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Section: Use Of Dcd-amended Inorganic Fertilizersmentioning

confidence: 99%

Potentials of nitrification inhibitors in modern N‐fertilizer management

Amberger

1986

J Plant Nutrition & Soil

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“…Plants can synthesize oxalate from different precursors in leaves, stems, and storage tissues (see ref 14 for a review). It is a general observation that there is a negative correlation between the level of plant nitrogen fertilization, which, among other factors, determines the concentration of nitrate in the plant, and the leaf oxalate concentration ( − ). This implies a dilemma: a low level of oxalate would generally occur in tandem with a relatively high nitrate level in spinach, or vice versa.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of Oxalic Acid from Spinach Using Cereal Radicles

Betsche¹,

Fretzdorff²

2005

J. Agric. Food Chem.

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A high level of oxalate intake constitutes a health risk for infants and metabolically disposed adults. Spinach, acclaimed for its many health benefits, is among the vegetables richest in oxalate. Blanching reduces oxalate unsatisfactorily and unspecifically. An alternative, biological method is proposed on the basis of rye seedlings or radicles (also barley and wheat) containing an oxalate-specific oxalate oxidase by nature. Dissolved oxalate (0.25 mM) was rapidly degraded in the presence of radicles (e.g., 70% within 100 min). With commercial deep-frozen spinach, near-complete degradation of soluble oxalate was achieved at pH 3.5. The total level of oxalate was reduced by half. Similarly high rates occurred from 18 to 35 degrees C. Even at 55 degrees C appreciable rates were observed. The seedling as a whole is effective, too, and enrichment with cereal-specific healthy components would occur. Removal of oxalate from other vegetables, juices, cycled process waters, or feeds is conceivable with fresh or heat-dried cereal seedlings or radicles.

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“…Nitrapyrin has been seen to reduce nitrate content in radish (Mills et al 1976), spin-ach (Bengtsson 1968, von Kick and Massen 1973, von Siegel and Vogt 1975, Mills et al 1976), and red beet roots ). In the case of red beet the reduction has been observed while using urea as the sole nitrogen source .…”

Section: Introductionmentioning

confidence: 99%

Diurnal variations in nitrate content of red beets

Kallio

Rousku

Salminen³

1984

AFSci

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The diurnal variations in nitrate content of red beet (Beta vulgaris L. var. conditiva) roots and leaves were observed in cultivations with either no nitrogen fertilizer or with Ca(NO3)2 addition. With less nitrate in the soil the diurnal reduction of nitrate content in the afternoon was greater; on the average 55 % in the leaves and 20 % in the roots of the maximum values in the middle of August. With nitrogen fertilizing (100 kg of nitrogen/ha) the corresponding values were about 15 to 20 %. The amplitude of alteration decreased toward the end of the growing season, as the nitrate content in the leaves in particular was reduced. In our experimental conditions nitrapyrin, a nitrification inhibitor, had no effect on the nitrate content in roots or leaves.

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Der Einfluß von Dicyandiamid und N‐Serve in Verbindung mit Ammoniumsulfat als N‐Dünger auf die Nitrat‐ und Oxalsäuregehalte von Spinat (Spinacia oleracea)

Cited by 14 publications

References 5 publications

Potentials of nitrification inhibitors in modern N‐fertilizer management

Potentials of nitrification inhibitors in modern N‐fertilizer management

Biodegradation of Oxalic Acid from Spinach Using Cereal Radicles

Diurnal variations in nitrate content of red beets

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