THE SEASONAL VARIATION IN CHEMICAL COMPOSITION OF MACROCYSTIS INTEGRIFOLIA AND NEREOCYSTIS LUETKEANA IN BRITISH COLUMBIA COASTAL WATERS

1955 ◽  
Vol 33 (4) ◽  
pp. 323-340 ◽  
Author(s):  
D. J. Wort
Keyword(s):  
British Columbia ◽  
Seasonal Variation ◽  
Chemical Composition ◽  
Total Nitrogen ◽  
Coastal Waters ◽  
Dry Weight ◽  
Nereocystis Luetkeana ◽  
Macrocystis Integrifolia ◽  
Copper Zinc ◽  
Nitrogen Phosphorus

Macrocystis integrifolia and Nereocystis luetkeana were collected at Port Hardy and Vancouver, B.C., respectively, at monthly intervals October 1949 through September 1951. Analyses of fronds and of stipes were made for dry weight, ash, total nitrogen, total phosphorus, sulphur, copper, zinc, iron, ether-solubles, algin, mannitol, fucoidin, and laminarin. Generally speaking the fronds had a higher content of all substances measured than did the stipes, and the content of the two species of algae showed parallel variation but differed in values. Dry weight and ash were at maxima in late fall and winter and at minima in April and May. During March total nitrogen, ether-solubles, mannitol, fucoidin, and laminarin were at their highest concentration. The plants in July contained the minima of total nitrogen, phosphorus, and ether-solubles. The maximum for phosphorus occurred in December and during this same month fucoidin was at minimum. The variation of sulphur, copper, zinc, iron, and algin was such that well marked minima and maxima were not evident.

CHEMICAL COMPOSITION AND TOXICOLOGICAL INDICATORS OF ORGANIC WASTE IN VARIOUS WAYS OF PROCESSING

2020 ◽  
Vol 1 (4) ◽  
pp. 486-493
Author(s):  
V.G. Tyurin ◽  
◽  
G.A. Mysova ◽  
N.N. Potyemkina ◽  
A.Yu. Sakharov ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Organic Waste ◽  
Raw Materials ◽  
Organic Fertilizers ◽  
Chicken Manure ◽  
Vacuum Drying ◽  
Organic Mass ◽  
Copper Zinc ◽  
Nickel Lead ◽  
Nitrogen Phosphorus

The article presents the results of research of chemical composition of chicken manure after its low-temperature vacuum drying and processing of organic raw materials by biofermentation in specialized facilities with active aeration of organic mass. Organic fertilizers based on chicken manure obtained as a result of temperature drying in a vacuum and active aerobic fermentation have a high content of basic nutrients: total nitrogen, phosphorus, potassium, trace elements: copper, zinc, manganese, iron, necessary for plants and a minimum content of heavy metals: cadmium, nickel, lead, mercury, which is below the maximum permissible, approximately permissible concentrations of chemicals in soil in accordance with hygiene standards.

INFLUENCE DE LA FERTILISATION N, P ET K SUR LA COMPOSITION CHIMIQUE DU TABAC A CIGARETTE

1983 ◽  
Vol 63 (2) ◽  
pp. 523-529 ◽  
Author(s):  
MICHEL LAMARRE
Keyword(s):  
Chemical Composition ◽  
Total Nitrogen ◽  
Sandy Loam ◽  
Potassium Fertilizer ◽  
Composition Chimique ◽  
Nicotine Content ◽  
Total Alkaloids ◽  
Nicotiana Tabacum L ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

The effect of nitrogen, phosphorus and potassium fertilizers on the chemical composition of field grown flue-cured tobacco was studied for a 3-yr period. The study consisted of 64 treatments replicated three times. It was conducted on a Soulanges sandy loam and an Uplands sand. In both soils, nitrogen and potassium showed the same trends. Nitrogen fertilizer increased nicotine content, total nitrogen and total alkaloids and reduced the percentage of reducing sugars. Phosphorus and potassium fertilizer decreased the nicotine content, total nitrogen and total alkaloids and increased the reducing sugars.Key words: Cigarette tobacco, chemical composition, alkaloids, nicotine, fertilization, Nicotiana tabacum L.

scholarly journals Gross chemical profile and calculation of nitrogen-to-protein conversion factors for nine species of fishes from coastal waters of Brazil

2017 ◽  
Vol 41 (2) ◽  
pp. 254-264
Author(s):  
Graciela S. Diniz ◽  
Elisabete Barbarino ◽  
João Oiano-Neto ◽  
Sidney Pacheco ◽  
Sergio O. Lourenço
Keyword(s):  
Amino Acid ◽  
Total Nitrogen ◽  
Dry Weight ◽  
Total Amino Acid ◽  
Nitrogen And Phosphorus ◽  
Conversion Factors ◽  
Low Concentrations ◽  
Low Carbohydrate ◽  
Amino Acids Composition ◽  
Nitrogen Phosphorus

The amino acid composition and contents of nitrogen, phosphorus, lipid, carbohydrate and protein were determined in muscles of Dactylopterus volitans, Genypterus brasiliensis, Mullus argentinae, Paralichthys patagonicus, Percophis brasiliensis, Pinguipes brasilianus, Rhizoprionodon lalandii, Rhizoprionodon porosus, and Urophycis cirrata. The samples showed low carbohydrate content (<3.5% dry weight in all species) and were rich in protein (>66% dry weight in all species). The percentage of total lipid varied widely among species, and M. argentinae showed the highest concentrations (16%). The percentage of nitrogen and phosphorus was high and similar among species, with overall average values of 13.3% and 1.2%, respectively. The amino acids composition was similar among the animals, with glutamic acid and lisine as the most abundant amino acid and histidine in low concentrations. Among species, the content of proteinaceous nitrogen was high, with an average of 96.8% of the total nitrogen. From data of total amino acid and total nitrogen, specific nitrogen-to-protein conversion factors were calculated for each species. The nitrogen-toprotein conversion factors ranged from 5.39 to 5.98, with an overall average of 5.71. These findings showed that the traditional conversion factor of 6.25 overestimates the actual protein content and should be avoided.

Function of coprophagous beetles (Coleoptera: Scarabaeidae, Geotrupidae, Hydrophilidae) in cattle pastures inferred from pitfall trapping data

2010 ◽  
Vol 27 (2) ◽  
pp. 85-91 ◽  
Author(s):  
Martin Šlachta ◽  
Jan Frelich ◽  
Tomáš Tonka
Keyword(s):  
Seasonal Variation ◽  
Spatial Variation ◽  
Dry Weight ◽  
Seasonal Distribution ◽  
The Other ◽  
Pitfall Trapping ◽  
Other Hand ◽  
Nested Anova ◽  
Species Groups ◽  
Dung Decomposition

Function of coprophagous beetles (Coleoptera: Scarabaeidae, Geotrupidae, Hydrophilidae) in cattle pastures inferred from pitfall trapping dataAn analysis of data on the dry weight biomass of coprophagous beetles in standardized dung (4.5 l) was conducted in order to characterize the spatial and the seasonal distribution of the beetles' biomass in cattle pastures and to elucidate their function in dung decomposition. Nested Anova with factors of farm, site (nested in farm), seasonal period and year was used to evaluate the effect of these factors on the biomass of four functional species groups: the dung dwellers ofScarabaeidae(subfamilyAphodiinae), the dung dwellers ofHydrophilidae, the small tunnellers ofScarabaeidae(subfamilyCoprinae) and the large tunnellers ofGeotrupidae. The spatial variation of biomass (between the sites and the farms) was insignificant (P>0.05) in the two dung-dweller groups and in the large-tunnellers group. On the other hand, a significant (P<0.05) seasonal variation of biomass was found in all but the large tunneller group. In dung dwellers, the spring biomass was formed mainly by two species,Aphodius prodromusandA. sphacelatus. In summer, most of the biomass was accounted for bySphaeridium lunatum, S. scarabaeoidesandA. rufipes. In the two tunneller groups,Onthophagus fracticornis, Geotrupes stercorariusandG. spinigerformed a majority of the biomass in dung.

Impact of an Open Trellis on Canopy Growth, Light Interception, Yield, and Leaf Physiology of Red Raspberry (Rubus idaeus)

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 468b-468
Author(s):  
Stephen F. Klauer ◽  
J. Scott Cameron ◽  
Chuhe Chen
Keyword(s):  
Leaf Area ◽  
Total Nitrogen ◽  
Dry Weight ◽  
Light Interception ◽  
Rubus Idaeus ◽  
Above Ground Biomass ◽  
Red Raspberry ◽  
Leaf Physiology ◽  
Total Dry Weight ◽  
Upper Third

After promising results were obtained with an open-style split trellis (two top wires) in its initial year, two new trials were established in 1997 in northwest (Lynden) and southwest (Woodland) Washington. For the split trellis, actual yields were 33% (machine-picked 1/2 season) and 17% (hand-picked) greater, respectively, for the two locations compared to the conventional trellis (one top wire). In Woodland, canes from the split trellis had 33% more berries, 55% more laterals, 69% more leaves, and 25% greater leaf area compared with the conventional trellis. Greatest enhancement of these components was in the upper third of the canopy. Laterals were also shorter in this area of the split canopy, but there was no difference in average total length of lateral/cane between trellis types. Total dry weight/cane was 22% greater in the split trellis, but component partitioning/cane was consistent between the two systems with fruit + laterals (43%) having the greatest above-ground biomass, followed by the stem (30% to 33%) and the leaves (21% to 22%). Measurement of canopy width, circumference, and light interception showed that the split-trellis canopy filled in more quickly, and was larger from preanthesis through postharvest. Light interception near the top of the split canopy was 30% greater 1 month before harvest with 98% interception near the top and middle of that canopy. There was no difference between the trellis types in leaf CO2 assimilation, spectra, or fluorescence through the fruiting season, or in total nitrogen of postharvest primocane leaves.

Growth, Productivity and Chemical Composition of a Sub-Alpine Meadow in Interior British Columbia

1963 ◽  
Vol 16 (5) ◽  
pp. 235 ◽  
Author(s):  
Alastair McLean ◽  
H. H. Nicholson ◽  
A. L. Van Ryswyk
Keyword(s):  
British Columbia ◽  
Chemical Composition ◽  
Alpine Meadow
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