Effects of different potassium and iron levels on seasonal changes of nutrient concentrations of tomato plant grown in soilless culture

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
Filiz Okturen Asri
Keyword(s):  
Tomato Plant ◽  
Seasonal Changes ◽  
Nutrient Concentrations ◽  
Soilless Culture ◽  
Plant Grown

scholarly journals Seasonal changes in water quality and macrophytes and the impact of cattle on tropical floodplain waterholes

2012 ◽  
Vol 63 (9) ◽  
pp. 788 ◽  
Author(s):  
N. E. Pettit ◽  
T. D. Jardine ◽  
S. K. Hamilton ◽  
V. Sinnamon ◽  
D. Valdez ◽  
...  
Keyword(s):  
Water Quality ◽  
Seasonal Changes ◽  
Aquatic Macrophyte ◽  
Plant Cover ◽  
Critical Role ◽  
Dry Season ◽  
Nutrient Concentrations ◽  
Wet Season ◽  
Dry Tropics ◽  
The Impact

The present study indicates the critical role of hydrologic connectivity in floodplain waterholes in the wet–dry tropics of northern Australia. These waterbodies provide dry-season refugia for plants and animals, are a hotspot of productivity, and are a critical part in the subsistence economy of many remote Aboriginal communities. We examined seasonal changes in water quality and aquatic plant cover of floodplain waterholes, and related changes to variation of waterhole depth and visitation by livestock. The waterholes showed declining water quality through the dry season, which was exacerbated by more frequent cattle usage as conditions became progressively drier, which also increased turbidity and nutrient concentrations. Aquatic macrophyte biomass was highest in the early dry season, and declined as the dry season progressed. Remaining macrophytes were flushed out by the first wet-season flows, although they quickly re-establish later during the wet season. Waterholes of greater depth were more resistant to the effects of cattle disturbance, and seasonal flushing of the waterholes with wet-season flooding homogenised the water quality and increased plant cover of previously disparate waterholes. Therefore, maintaining high levels of connectivity between the river and its floodplain is vital for the persistence of these waterholes.

scholarly journals Seasonal Changes of Nutrient Concentrations in Water of Some Locations in Southern Iraqi Marshes, After Restoration.

2009 ◽  
Vol 6 (4) ◽  
pp. 711-718
Author(s):  
Baghdad Science Journal
Keyword(s):  
Seasonal Changes ◽  
T Test ◽  
Nutrient Concentrations ◽  
P Value ◽  
Statistical Program ◽  
Nutrients Concentration ◽  
Colorimetric Methods

After restoration of Iraqi marshes during 2003, three locations were chosen, one in each main marsh (Um Al-Naaj site in Al-Hwaizeh marsh; Al-Nagarah site in Al-Hammar marsh and Al-Baghdadia site in Al-Chebaysh marsh) to determine the concentrations of nutrients (Nitrate, Nitrite, Phosphate and Silicate) in water seasonally for the period winter, spring, summer, and autumn at 2007. Five water replicates were collected from each site, seasonally. In the Lab., the samples were analyzed by colorimetric methods; the results showed that Um-Al-Naaj site has the highest nutrients level, while Al-Nagarah site has the lowest level. The statistical program t-test was applied at the significant levels (P-value < 0.01) and (P-value < 0.05) to know the significant differences in the nutrients concentration among the sites, as well as among the seasons. Statistically, the results showed that NO3, NO2, and PO4 concentrations have significant differences among the sites, as well as among the seasons. While, SiO2 concentrations have no significant differences among the sites, but they differed significantly among the seasons.

scholarly journals Seasonal Changes in the Chemical Composition of Aspilia Africana Plant Grown in Nigeria

2016 ◽  
Vol 8 (4) ◽  
pp. 18-24
Author(s):  
Oluwatosin Kennedy Oko ◽  
Magnus Izah Anya ◽  
Pascal Ogar Ozung ◽  
Iferi Ibiang Eyong ◽  
Lizubili Freeman Mboto
Keyword(s):  
Chemical Composition ◽  
Seasonal Changes ◽  
Plant Grown

scholarly journals Influence of activator on meiosis of tomato (Lycopersicon esculentum Mill.)

2014 ◽  
Vol 42 (2) ◽  
pp. 361-365
Author(s):  
Ilkay Öztürk Çali ◽  
Reyza Candan
Keyword(s):  
Cell Division ◽  
Lycopersicon Esculentum ◽  
Tomato Plant ◽  
Chromosomal Anomalies ◽  
Recommended Dosage ◽  
Lycopersicon Esculentum Mill ◽  
Cytogenetic Effects ◽  
Cell Shapes ◽  
Group A ◽  
Plant Grown

The cytogenetic effects of activator Act-2 (based in compounds of addition hydro soluble of K-vitamin group a new and specific organic metabolic activator) on meiosis of tomato (Lycopersicon esculentum Mill.) were studied. The activator was applied to tomato plant grown in greenhouse at the dosage (150 cc/100 water) recommended by the manufacturing company and double the recommended dosage (300 cc/100 water) as well. It was observed that all dosages of the activator gave rise to some changes in cell shapes, chromosome structures, cell division patterns and cell sizes of tomato pollen. As a consequence of chromosomal anomalies sterile pollens were produced that affected yield negatively. DOI: http://dx.doi.org/10.3329/bjb.v42i2.18045 Bangladesh J. Bot. 42(2): 361-365, 2013 (December)

Advances in soilless culture of ornamentals

2021 ◽  
pp. 401-416
Author(s):  
Erik van Os ◽  
◽  
Arca Kromwijk ◽  
Keyword(s):  
The Netherlands ◽  
Nutrient Solution ◽  
Soilless Culture ◽  
Cut Flowers ◽  
Culture Systems ◽  
Liquid Discharge ◽  
Plant Grown ◽  
Disease Free ◽  
Pot Plants ◽  
Pot Plant

In the production of cut flowers and pot plants there are slow developments towards closed growing systems with recirculation of the surplus nutrient solution. In some countries, such as in The Netherlands, legislation to reduce discharges is a steering factor, as well as the advantages of a disease free start, higher potential production and quality. Crops such as rose and gerbera with less than 10 plants per m2 are now grown in completely closed growing systems and are on their way towards zero liquid discharge. Crops such as freesia, amaryllis and chrysanthemum, are still experimenting with soilless culture systems. Phalaenopsis is the most important pot plant grown in The Netherlands and is on the way towards a closed growing system. This chapter discusses the progress made, key challenges and how they are being overcome.

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