+ Translate
+ Most Popular
Investigations on the organic drift in North Swedish streams
Limitations of Using Microsoft Excel Version 2016 (MS Excel 2016) for Statistical Analysis for Medical Research
Phloem necrosis of coffee in Surinam
Anatomy of Mystus seenghala IV Nervous system
Integrated farming system for gardenland conditions of Coimbatore district - an over view
Tetrapleure (Tetrapleura tetraptera), an unknown African medicinal and spice plant
The origin and phylogenetic significance of the trochophoran larvae 2. evolutionary significance of the larvae of coelomate worms and mollusks
Comparison of rice bran and maize bran as feeds for growing and fattening pigs
Enterobacter amnigenus. An unusual human pathogen
Influence of Seriboost foliar application on leaf yield and leaf protein content in mulberry (Morus spp.), in relation to silkworm cocoon production
The identity of the lipstick mold of cultivated mushrooms agaricus bisporus
Advantages and disadvantages of bordeaux mixture and of lime-sulphur used on apples in the growing season
'Pan-sukh' disease of Rice in the Central Provinces
Geological age of the Ptilophyllum flora; a critical reassessment
Study of vitellogenesis in birds; physiological phases & role of folliculin in vitellogenesis
Evaluation of WCT coconut and Komadan coconut
Therapy for acne with saccharomyces boulardii
Evidence for Late Cretaceous N-S dextral shear in the west-central crystalline core, North Cascades, Washington
'Rajeshwari' - a high-yielding white seeded variety of sesame for Andhra Pradesh
Manufacture of Ricotta cheese from whey fortified with skim milk powder using different acidulants
Occurrence of Eutrichophilus mexicanus (Rudow, 1866) and Eutrichophilus lobatus (Ewing, 1936) (Phthiraptera: Trichodectidae) on Sphiggurus villosus (Cuvier, 1825) (Rodentia: Erethizontidae) in Rio de
Factors affecting fruitfulness in durian (Durio zibethinus Murr.). I. Flowering and pollination
Bronchial cuff pressure change caused by left-sided double-lumen endobronchial tube displacement
Some Biological Applications of Organometallic Compounds
The composition of pampas-grass (Cortaderia argentea.)

Urea as a nitrogen source for the phytoplankton in the Oslofjord

Urea as a nitrogen source for the phytoplankton in the Oslofjord

ine Biology 74: 24

DOI: 10.1007/bf00394270

Ambient concentrations of urea in the inner Oslofjord, Norway, showed a pronounced yearly cycle in 1980, with values in the range 0.1 to 10.0 g-at N l-1; this cycle resemble that of ammonia although urea concentrations were usually lower. The uptake of urea by phytoplankton was investigated using 15N. Urea was usually a less important N source than NH4+, and accounted for 0 to 53% (mean 19%) of summed NH4++NO3-+ urea uptake rates from April to October. Absolute as well as relative (specific) uptake rates of urea were higher in the summer (June–August) than at other times. Uptake of urea was inhibited by NH4+concentrations higher than 1 to 2 g-at N l-1. The summed NH4++NO3-+ urea uptake rate was exponentially related to temperature.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 018199946

Download citation: RISBibTeXText

Related references

Urea as nitrogen source for phytoplankton production in coastal waters of goa india. Indian Journal of Marine Sciences 14(2): 93-97, 1985

Phosphorus and nitrogen limitation of phytoplankton in the inner Oslofjord (Norway). Sarsia 733: 229-243, 1988

Urea-mineral mixtures (UMM) as a source of nitrogen for ruminants. 4. Use of urea nitrogen by fattening calves given urea in UMM as licks and as the urea concentrate Starea. Zhivotnov"dni Nauki 13(3): 31-36, 1976

Urea decomposition and its significance as a nitrogen source of phytoplankton in euphotic zone of osaka bay japan. Memoirs of Osaka Kyoiku University Series III Natural Science and Applied Science 38(1): 47-61, 1989

Phytoplankton growth and composition in shipboard cultures supplied with nitrate, ammonium, or urea as the nitrogen source. Limnology and Oceanography 16(5): 741-751, 1971

Urea mineral mixtures as a nitrogen source for ruminants part 1 urea nitrogen utilization by fattening calves when urea is provided using urea mineral mixture in the form of licking blocks or using complete ration mixtures. Zhivotnov"dni Nauki 12(4): 34-42, 1975

Urea as a source of nonprotein nitrogen for ruminants 2. effect of urea as a nonprotein source on digestibility and voluntary intake by sheep fed alkali treated rice straw. Journal of the National Science Council of Sri Lanka 8(1): 61-68, 1980

Iso butylidene di urea as a source of nonprotein nitrogen compounds for ruminants 2. digestion of nitrogen 15 labeled iso butylidene di urea in lactating dairy cows. Archiv fuer Tierernaehrung 31(4): 273-292, 1981

Changes in nitrogen compounds in the rumen, digestibility of nutrients and nitrogen balance in sheep given urea as almost the only source of nitrogen. Zeszyty Problemowe Postepow Nauk Rolniczych 126: 87-92, 1972

Nitrogen nutrition of Agaricus bisporus. 1. Form of inorganic nitrogen utilized. 2. Urea as the nitrogen source. J. Taiwan agric. Res 16(3): 25-32, 1967

Evaluation of urea urea phosphate as a nitrogen source for no tillage production. Soil Science Society of America Journal 51(1): 242-246, 1987

Urea transformation and the adaptability of three leafy vegetables to urea as a source of nitrogen in hydroponic culture. Journal of Plant Nutrition 16(5): 797-812, 1993

Sulfur coated urea vs urea and ammonium nitrate as a nitrogen source for grain sorghum. Soil and Crop Science Society of Florida Proceedings 35: 38-42, 1976

Urea transformation and tahe adaptability of three leafy vegetables to urea as a source of nitrogen in hydroponic culture. Journal of plant nutrition 6(5): 797-812, 1993

Urea as sole source of nitrogen for plant growth : II. Urease and the metabolism of urea in Spirodela oligorrhiza. Planta 83(1): 13-19, 1968