Distribution and recovery of15N after fertilization of Douglas-fir saplings with different nitrogen sources

The effects of nitrogen fertilization on foliage nitrogen concentration, rates of photosynthesis, and stem diameter growth were studied for Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) trees, with a range of fertilizer applications from 0 to 896 kg N/ha. Ammonium nitrate (AN) and urea were compared as nitrogen sources. AN provided for a higher foliage nitrogen concentration and better growth the 1st year, but there was no source effect thereafter. A significant relationship was obtained between foliage nitrogen concentration and rate of photosynthesis, with an optimum rate at 1.74% foliar nitrogen and with no effect of nitrogen source. Stem diameter growth was increased at all fertilization rates, although no effect of the two lowest rates of fertilization (112 and 224 kg N/ha) was found on foliar nitrogen concentration.

Download Full-text

Response of Douglas fir seedlings to nitrate and ammonium nitrogen sources at different levels of pH and iron supply

Plant and Soil ◽

10.1007/bf02183285 ◽

1978 ◽

Vol 49 (3) ◽

pp. 607-623 ◽

Cited By ~ 34

Author(s):

R. Van Den Driessche

Keyword(s):

Nitrogen Sources ◽

Ammonium Nitrogen ◽

Douglas Fir ◽

Iron Supply ◽

Different Levels

Download Full-text

Effect of a constant supply of different nitrogen sources on protein and carbohydrate content and enzyme activities of Anabaena variabilis cells

Physiologia Plantarum ◽

10.1034/j.1399-3054.1995.950106.x ◽

1995 ◽

Vol 95 (1) ◽

pp. 39-44 ◽

Cited By ~ 1

Author(s):

Andres P Sanz ◽

Conrado Moreno-Vivian ◽

Jose M. Maldonado ◽

Agustin Gonzalez-Fontes

Keyword(s):

Enzyme Activities ◽

Nitrogen Sources ◽

Carbohydrate Content ◽

Anabaena Variabilis

Download Full-text

Linking nitrogen sources utilised by seagrass in a temperate marine embayment to patterns of seagrass change during drought

Marine Ecology Progress Series ◽

10.3354/meps11708 ◽

2016 ◽

Vol 549 ◽

pp. 79-88 ◽

Cited By ~ 14

Author(s):

AJ Hirst ◽

AR Longmore ◽

D Ball ◽

PLM Cook ◽

GP Jenkins

Keyword(s):

Nitrogen Sources ◽

Marine Embayment

Download Full-text

Effect of Nitrogen Sources on the AZO Dye Decolourization

International Journal of Scientific Research ◽

10.15373/22778179/july2013/143 ◽

2012 ◽

Vol 2 (7) ◽

pp. 424-426

Author(s):

Suchita Dahiwade ◽

◽

Dr. A. O. Ingle Dr. A. O. Ingle ◽

Dr. S. R. Wate Dr. S. R. Wate

Keyword(s):

Azo Dye ◽

Nitrogen Sources ◽

Dye Decolourization

Download Full-text

IDENTIFICATION AND CHARACTERIZATION OF A PURPLE NONSULFUR BACTERIUM ISOLATED FROM COASTAL AREA OF HAI PHONG FOR USING IN PRODUCTION OF UNSATURATED FATTY ACID (OMEGA 6, 7, 9)

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/57/6/13711 ◽

2019 ◽

Vol 57 (6) ◽

pp. 665 ◽

Cited By ~ 1

Author(s):

Yen Thi Hoang ◽

Quynh Thi Thu Tran ◽

Ha Hoang Chu ◽

Tuyen Thi Do ◽

Thanh Tat Dang ◽

...

Keyword(s):

Fatty Acid ◽

Unsaturated Fatty Acid ◽

Unsaturated Fatty Acids ◽

Nitrogen Sources ◽

16S Rrna Analysis ◽

Rhodovulum Sulfidophilum ◽

Purple Nonsulfur Bacterium ◽

High Lipid ◽

Physiological Properties ◽

Omega 6

Purple nonsulfur bacteria are a group that has so much biotechnological applications, particularly in producing of functional food rich with unsaturated fatty acids. A purple nonsulfur bacterium (named HPB.6) was chosen based on its strong growth, high lipid and synthesis of unsaturated fatty acid (omega 6,7,9). Studying on basic biological characteristics showed that the cells of HPB.6 were observed as ovoid-rod shape, none motility, Gram negative staining. The diameter of single bacterium was about 0.8-1.0 µm. The cells divide by binary fission and had bacteriochlorophyll a (Bchl a). This bacterium grew well on medium with carbon and nitrogen sources such as acetate, succinate, pyruvate, butyrate, glutamate, arginine, leucine, tyrosine, alanine, methionine, threonine, glutamine, yeast extract and NH4Cl. This selected strain grew well on medium with salt concentrations from 1.5 - 6.0% (optimum 3%), pH from 5.0 to 8.0 (optimum at pH 6.5) and could withstand Na2S at 4.0 - 5.2 mM. Based on morphological, physiological properties and 16S rRNA analysis received demonstrated that HPB.6 strain belongs to the species Rhodovulum sulfidophilum.

Download Full-text