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

1985 ◽  
Vol 84 (2) ◽  
pp. 167-174 ◽  
Author(s):  
Patrick C. K. Pang
Keyword(s):  
Nitrogen Sources ◽  
Douglas Fir

Effects of nitrogen fertilizer source and application rates on foliar nitrogen concentration, photosynthesis, and growth of Douglas-fir

1981 ◽  
Vol 11 (4) ◽  
pp. 775-780 ◽  
Author(s):  
H. Brix
Keyword(s):  
Nitrogen Concentration ◽  
Nitrogen Sources ◽  
Douglas Fir ◽  
Stem Diameter ◽  
Diameter Growth ◽  
Foliar Nitrogen ◽  
Fertilization Rates ◽  
Application Rates ◽  
Rate Of Photosynthesis ◽  
Stem Diameter Growth

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.

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

2016 ◽  
Vol 549 ◽  
pp. 79-88 ◽  
Author(s):  
AJ Hirst ◽  
AR Longmore ◽  
D Ball ◽  
PLM Cook ◽  
GP Jenkins
Keyword(s):  
Nitrogen Sources ◽  
Marine Embayment

Effect of Nitrogen Sources on the AZO Dye Decolourization

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

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)

2019 ◽  
Vol 57 (6) ◽  
pp. 665 ◽  
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.

Sarcosine and Creatine as Nitrogen Sources for the Ruminant, and the Influence of Supplemental Vitamin B12

1959 ◽  
Vol 18 (2) ◽  
pp. 780-789 ◽  
Author(s):  
C. D. Campbell ◽  
G. A. McLaren ◽  
G. C. Anderson ◽  
J. A. Welch ◽  
G. S. Smith ◽  
...  
Keyword(s):  
Vitamin B12 ◽  
Nitrogen Sources ◽  
Supplemental Vitamin
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