scholarly journals Seasonal variation in phytomass and nutrient status of Phragmites australis along the water courses in the middle Nile Delta, Egypt.

Taeckholmia ◽  
2000 ◽  
Vol 20 (2) ◽  
pp. 123-138 ◽  
Author(s):  
Hassan El-Kady
Keyword(s):  
Seasonal Variation ◽  
Phragmites Australis ◽  
Nile Delta ◽  
Nutrient Status ◽  
Water Courses

scholarly journals Evaluation of the Nutrient Status of Some Hydrophytes in the Water Courses of Nile Delta, Egypt

2009 ◽  
Vol 2009 ◽  
pp. 1-11 ◽  
Author(s):  
Kamal H. Shaltout ◽  
Tarek M. Galal ◽  
Thanaa M. El-Komi
Keyword(s):  
Nile Delta ◽  
Nutrient Status ◽  
The Other ◽  
Ceratophyllum Demersum ◽  
Chemical Compositions ◽  
Net Energy ◽  
Ether Extract ◽  
Total Carbohydrate ◽  
Vegetative Phase ◽  
Water Courses

The nutritive values of three dominant hydrophytes along the water courses in Nile Delta, Egypt (Echinochloa stagnina, Eichhornia crassipes, and Ceratophyllum demersum) were evaluated in terms of estimating their phytomass, organic, and inorganic chemical compositions. Shoots were collected seasonally from 25 permanent stands representing the distribution of the three species along 15 canals and 10 drains distributed in 5 localities within the Nile Delta. Living and dead parts and total phytomass were estimated. Their inorganic (Na, K, Ca, Mg, P, Cu, Mn, and Pb) and organic (carbohydrates, total nitrogen, total protein, ether extract, digestible nutrient, digestible energy, metabolized energy, and net energy) contents were estimated. The vegetative phase of E. stagnina extended during winter, spring, and summer, while it is flowering and fruiting during autumn. On the other hand, E. crassipes and C. demersum attained their maximum flowering during spring and maximum fruiting during summer, while maximum vegetative phase during autumn and winter. E. stagnina had the highest mean annual phytomass, while C. demersum had the lowest. The living parts of C. demersum had the highest concentrations of Na, Ca, and Mg, while the living parts of E. crassipes had the highest of K and N. C. demersum had the ability to accumulate more concentrations of heavy metals than the other studied species. E. crassipes had the highest values of total carbohydrate and total proteins, while E. stagnina had the highest of crude fibers, and C. demersum had the highest of ether extract and ash contents. The living parts of E. crassipes and C. demersum were considered as excellent forages, while the dead parts of all species and the living parts of E. stagnina were evaluated as poor forage.

scholarly journals Evaluation of the nutrient status of some hydrophytes in the water courses of Nile Delta, Egypt

2010 ◽  
Vol 36 (1) ◽  
pp. 77-87 ◽  
Author(s):  
Kamel H. Shaltout ◽  
Tarek M. Galal ◽  
Thanaa M. El-Komi
Keyword(s):  
Nile Delta ◽  
Nutrient Status ◽  
Water Courses

Biomass, nutrients and nutritive value of Persicaria salicifolia Willd. in the water courses of Nile Delta, Egypt

2013 ◽  
Vol 25 (2) ◽  
pp. 167-179 ◽  
Author(s):  
Kamal H. Shaltout ◽  
Tarek M. Galal ◽  
Thanaa M. El-Komi
Keyword(s):  
Nutritive Value ◽  
Nile Delta ◽  
Water Courses

scholarly journals Seasonal variation in AMF colonisation, soil and plant nutrient content in gypsum specialist and generalist species growing in P-poor soils

2021 ◽  
Author(s):  
Andreu Cera ◽  
Estephania Duplat ◽  
Gabriel Montserrat-Martí ◽  
Antonio Gómez-Bolea ◽  
Susana Rodríguez-Echeverría ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Nutrient Availability ◽  
Soil Nutrient ◽  
Nutrient Status ◽  
Nutrient Content ◽  
P Availability ◽  
Plant Nutrient ◽  
Rhizospheric Soil ◽  
Soil Nutrient Availability ◽  
Generalist Species

Abstract Aims Gypsum soils are P-limited atypical soils that harbour a rich endemic flora. These singular soils are usually found in drylands, where plant activity and soil nutrient availability are seasonal. No previous studies have analysed the seasonality of P nutrition and its interaction with the arbuscular mycorrhiza fungi (AMF) colonisation in gypsum plants. Our aim was to evaluate the seasonal changes in plant nutrient status, AMF colonisation and rhizospheric soil nutrient availability in gypsum specialist and generalist species. Methods We evaluated seasonal variation in the proportion of root length colonised by AMF structures (hyphae, vesicules and arbuscules), plant nutrient status (leaf C, N and P and fine root C and N) and rhizospheric soil content (P, organic matter, nitrate and ammonium) of three gypsum specialists and two generalists throughout a year. Results All species showed arbuscules within roots, including species of Caryophyllaceae and Brassicaceae. Root colonisation by arbuscules (AC) was higher in spring than in other seasons, when plants showed high leaf P-requirements. Higher AC was decoupled from inorganic N and P availability in rhizospheric soil, and foliar nutrient content. Generalists showed higher AC than specialists, but only in spring. Conclusions Seasonality was found in AMF colonisation, rhizospheric soil content and plant nutrient status. The mutualism between plants and AMF was highest in spring, when P-requirements are higher for plants, especially in generalists. However, AMF decoupled from plant demands in autumn, when nutrient availability increases in rhizospheric soil.

Modeling the growth dynamics of Pistia stratiotes L. populations along the water courses of south Nile Delta, Egypt

2015 ◽  
Vol 27 (2) ◽  
pp. 375-382 ◽  
Author(s):  
Ebrahem M. Eid ◽  
Tarek M. Galal ◽  
Mohammed A. Dakhil ◽  
Loutfy M. Hassan
Keyword(s):  
Nile Delta ◽  
Growth Dynamics ◽  
Pistia Stratiotes ◽  
Water Courses

Distribution of moths of the Egyptian cotton leafworm, Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae), in the Nile Delta interpreted from catches in a pheromone trap network in relation to meteorological factors

1984 ◽  
Vol 74 (3) ◽  
pp. 487-494 ◽  
Author(s):  
El-Sayed A. Nasr ◽  
M. R. Tucker ◽  
D. G. Campion
Keyword(s):  
Seasonal Variation ◽  
Spodoptera Littoralis ◽  
Nile Delta ◽  
Meteorological Factors ◽  
Source Area ◽  
Pheromone Trap ◽  
Seasonal Migrations ◽  
Egyptian Cotton ◽  
Lepidoptera Noctuidae ◽  
Egyptian Cotton Leafworm

AbstractRecords of daily catches of males of Spodoptera littoralis (Boisd.) at pheromone traps in or near the Nile Delta, Egypt, during 1979 and 1980 were used to investigate both the seasonal variation in catch and the possibility that migration, associated with particular weather systems, may significantly affect moth numbers in a particular area. Although more moths were caught in 1979 than in 1980, in both years there was a similar seasonal variation in catch, with low numbers in January and February followed by an increase to a maximum in June or August. There was no systematic seasonal change in the area of highest catch that would suggest seasonal migrations. On some nights, large increases in catch were associated with weather disturbances, notably windshift lines, suggesting that flying moths are sometimes redistributed by wind systems. Catches at two traps far from the main source area suggest that moths may have flown at least 50 km downwind from sources in the Nile Delta. The pattern of nightly catches at most traps indicated that build-up of local populations is the most important factor affecting the population dynamics of the pest but that some, mainly local, redistribution by wind systems takes place.

Study of Absorption of Heavy Metals (Pb,Cu) in Phragmites australis in Lingang New City

2014 ◽  
Vol 692 ◽  
pp. 3-7 ◽  
Author(s):  
Min Jiao ◽  
Xiang Li ◽  
Jing Yu Liu ◽  
Yong Qiang Tian ◽  
Yu Huang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Seasonal Variation ◽  
Phragmites Australis ◽  
Stems And Leaves ◽  
New City

Analysis on the concentrations of Pb, Cu in the roots, stems, leaves of phragmites australis which grows on Lingang New City of Shanghai showed that both of Pb, Cu in roots were higher concentrations than that in stems and leaves; the absorption of Pb,Cu had obvious seasonal variation; in winter, the enrichment of Pb, Cu in phranmites autralis was occurred and the enrichment ability of Pb was higher than Cu,

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