scholarly journals Effect of nutrient solution pH and N-Sources (NH4/NO 3) on the growth and elemental content of rice plants

Agronomie ◽  
1984 ◽  
Vol 4 (4) ◽  
pp. 361-365 ◽  
Author(s):  
S. M. ALAM
Keyword(s):  
Nutrient Solution ◽  
Elemental Content ◽  
Solution Ph ◽  
Rice Plants ◽  
N Sources

Effects of aluminum on nutrient solution pH and nitrate/ammonium uptake by triticale

1997 ◽  
Vol 20 (10) ◽  
pp. 1391-1401 ◽  
Author(s):  
A. M. G. Antunes ◽  
M. Antonieta Nunes
Keyword(s):  
Nutrient Solution ◽  
Ammonium Uptake ◽  
Solution Ph

POTASSIUM-SODIUM SELECTIVITY OF SUNFLOWER AS INFLUENCED BY CALCIUM SUPPLY UNDER SALINE CONDITIONS / SELECTIVIDAD DEL GIRASOL RESPECTO AL POTASIO Y SODIO BAJO LA INFLUENCIA DE LA PROVISION DEL POTASIO Y LAS CONDITIONES DE SALINIDAD / SÉLECTIVITÉ DU TOURNESOL EN CE QUI CONCERNE LE POTASSIUM ET LE SODIUM SOUS L’EFFET DE L’APPPORT DE CALCIUM DANS DES CONDITIONS SALINES

Helia ◽  
2001 ◽  
Vol 24 (34) ◽  
pp. 121-130
Author(s):  
Arshad Ali ◽  
M. Salim Badr-u-Zaman ◽  
Rahmatullah Badr-u-Zaman
Keyword(s):  
Nutrient Solution ◽  
Block Design ◽  
High Concentration ◽  
Solution Ph ◽  
Positive Role ◽  
Low Concentration ◽  
Salinity Levels ◽  
Half Strength ◽  
Calcium Supply ◽  
Hydroponic Study

SUMMARY A hydroponic study was conducted to investigate the influence of Ca supply on K+/Na+ selectivity of sunflower at 0, 75 and 150 mM NaCl in root medium. Sunflower (Helianthus annuus L. cv. Hysun-33) seeds were germinated in moist quartz sand and twelve-day old seedlings were foam-plugged in lids of plastic pots each containing 2.5 l of continuously aerated half strength Hoagland's nutrient solution without calcium salts. The solution pH was adjusted to 5.9 by adding HCl and NaOH. There were three salinity levels (0, 75 and 150 mM NaCl) and two calcium levels (5 and 10 mM CaCl2). The experiment was organized in a randomized complete block design (RCBD) in three replicates. At low concentration of calcium (5 mM), sunflower growth decreased drastically with increasing concentration of NaCl in nutrient solution. On the other hand, plants grown in high concentration of NaCl experienced less damage with relatively higher concentration of calcium. At relatively higher concentration of calcium (10 mM Ca), sunflower plants absorbed and translocated relatively more potassium and less sodium, than at low concentration of calcium (5 mM Ca), demonstrating the positive role of calcium in alleviating the hazardous effects of salinity on sunflower growth.

scholarly journals Sources and doses of aluminum in experiments with rice in nutrient solution

2019 ◽  
Vol 23 (7) ◽  
pp. 511-517
Author(s):  
Lucas B. de Freitas ◽  
Dirceu M. Fernandes ◽  
Suelen C. M. Maia ◽  
Arianne Moniz ◽  
Beatriz G. Mazziero ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Aluminum Chloride ◽  
Aluminum Toxicity ◽  
Upland Rice ◽  
Dry Weight ◽  
Potassium Sulfate ◽  
Rice Plants ◽  
Randomized Design ◽  
Aluminum Activity ◽  
Aluminum Compounds

ABSTRACT The aluminum source to produce toxicity in upland rice in nutrient solution experiments is not yet well established, althought the aluminum potassium sulfate has been utilized source to produce aluminum toxicity. However, in recent studies have used aluminum chloride. The aim of this study was to evaluate the capacity of aluminum sources and doses to produce toxicity in upland rice plants grown in nutrient solution. The experiment was arranged in a block randomized design, in a 2 x 5 factorial scheme and four repetitions. The treatments were two aluminum sources (aluminum potassium sulfate - AlK(SO4)2.12H2O and aluminum chloride - AlCl3.6H2O) and five aluminum doses in nutrient solution (0, 370, 740, 1100 and 1480 μmol L-1). The experiment was conducted in a greenhouse in Botucatu city, São Paulo state, Brazil, starting in April 2012, and was carried out for 56 days from transplanting of the seedlings. Using aluminum chloride, the rice plants show lower production of root and total dry weight, area and root volume, medium and thick root length, potassium and sulfur contents and accumulations. Using aluminum potassium sulfate, there are lower aluminum activity and availability, besides the formation of large amount of aluminum compounds non-toxic to the plants (aluminum sulfate) in the nutrient solution. The aluminum doses between 1100 to 1480 µmol L-1, corresponding to aluminum activity of 336.8 to 429.0 µmol L-1 of aluminum chloride as source, are more effective to produce aluminum toxicity in upland rice plants grown in nutrient solution.

Cadmium concentrations in the phloem sap of rice plants (Oryza sativaL.) treated with a nutrient solution containing cadmium

2003 ◽  
Vol 49 (2) ◽  
pp. 311-313 ◽  
Author(s):  
Kensuke Tanaka ◽  
Shu Fujimaki ◽  
Toru Fujiwara ◽  
Tadakatsu Yoneyama ◽  
Hiroaki Hayashi
Keyword(s):  
Nutrient Solution ◽  
Phloem Sap ◽  
Rice Plants

Salmonella Enteritidis survival in different temperatures and nutrient solution pH levels in hydroponically grown lettuce

2021 ◽  
pp. 103898
Author(s):  
Panayiota Xylia ◽  
Antonios Chrysargyris ◽  
George Botsaris ◽  
Panagiotis Skandamis ◽  
Nikolaos Tzortzakis
Keyword(s):  
Nutrient Solution ◽  
Salmonella Enteritidis ◽  
Solution Ph ◽  
Different Temperatures ◽  
Hydroponically Grown

scholarly journals Nutrient Solution Concentration Affects Shoot: Root Ratio, Leaf Area Ratio, and Growth of Subirrigated Salvia (Salvia splendens)

HortScience ◽  
2004 ◽  
Vol 39 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Jong-Goo Kang ◽  
Marc W. van Iersel
Keyword(s):  
Leaf Area ◽  
Nutrient Solution ◽  
Nutrient Concentration ◽  
Carbon Allocation ◽  
Area Ratio ◽  
Leaf Area Ratio ◽  
Solution Ph ◽  
Hoagland Solution ◽  
Shoot Tissue ◽  
Salvia Splendens

To evaluate the effects of nutrient concentration and pH of the fertilizer solution on growth and nutrient uptake of salvia (Salvia splendens F. Sellow ex Roem. & Schult. `Scarlet Sage'), we grew plants with five different concentrations of Hoagland nutrient solution [0.125, 0.25, 0.5, 1.0, and 2.0× full strength; electrical conductivity (EC) of 0.4, 0.7, 1.1, 2.0, and 3.7 dS·m-1, respectively]. In a concurrent experiment, plants were subirrigated with modified Hoagland solution at 0.5× concentration and one of five solution pH values: 4.4, 5.4, 6.4, 7.2, and 8.0. Shoot and total dry weight and leaf area increased greatly with increasing nutrient solution concentrations from 0.125 to 1.0×, while leaf photosynthesis (Pn), transpiration, and stomatal conductance decreased with increasing nutrient solution concentrations. Treatment effects on growth apparently were caused by changes in carbon allocation within the plants. Shoot: root ratio and leaf area ratio increased with increasing fertilizer concentration. Plants flowered 8 days later at low concentrations of nutrient solution than at high concentrations. Shoot tissue concentrations of N, P, K, and B increased, while C, Al, Mo, and Na decreased with increasing concentration of the nutrient solution. The pH of the nutrient solution had no effect on the growth or gas exchange of the plants, while its effects on nutrient concentration in the shoot tissue generally were smaller than those of fertilizer concentration. These results indicate that 1.0 to 2.0× concentrations of Hoagland solution result in maximum growth, apparently because the plants produce leaf area more efficiently at high fertilizer concentrations.

scholarly journals Macro- and Microelement Fertilizers Influence the Severity of Fusarium Crown and Root Rot of Tomato in a Soilless Production System

HortScience ◽  
1999 ◽  
Vol 34 (2) ◽  
pp. 287-291 ◽  
Author(s):  
B.K. Duffy ◽  
G. Défago
Keyword(s):  
Disease Severity ◽  
Nutrient Solution ◽  
Root Rot ◽  
Management Strategy ◽  
Ammonium Nitrogen ◽  
Mineral Fertilizers ◽  
Solution Ph ◽  
Host Nutrition ◽  
Crown And Root Rot ◽  
Plant Pathogen Interactions

Host nutritional variables were evaluated for their effects on the severity of crown and root rot of tomato caused by Fusarium oxysporum f.sp. radicis-lycopersici. Tomato (Lycopersicon esculentum Mill.) seedlings (cv. Bonnie Best) were grown in a pathogen-infested, soilless rockwool system in the greenhouse and were fertilized with a nutrient solution that was amended with macro- and microelements at various rates. Disease was evaluated after 2 weeks using an index of 0 to 4, and plant fresh weight was measured. Regression analysis indicated that disease severity was significantly increased by ammonium-nitrogen [NH4Cl, (NH4)6Mo7O24, and (NH4)2SO4], NaH2PO4·H2O, Fe-EDDHA, MnSO4, MoO3, and ZnSO4·7H2O. Disease severity was reduced by nitrate-nitrogen [Ca(NO3)2·4H2O] and CuSO4·H2O. Low rates of NH4NO3 (39 to 79 mg·L-1 N) reduced disease, but rates above 100 mg·L-1 N increased it. Disease was not affected by MgSO4·7H2O. In all cases, plant growth was inversely related to disease severity. Mineral fertilizers had no effect on nutrient solution pH. This information sheds new light on environmental factors that influence plant-pathogen interactions, and may be applied to develop a management strategy for Fusarium crown and root rot based on host nutrition.

scholarly journals Tuber Initiation in Hydroponically Grown Potatoes by Alteration of Solution pH

HortScience ◽  
1994 ◽  
Vol 29 (6) ◽  
pp. 621-623 ◽  
Author(s):  
Waylen Y. Wan ◽  
Weixing Cao ◽  
Theodore W. Tibbitts
Keyword(s):  
Tissue Culture ◽  
Mineral Composition ◽  
Nutrient Solution ◽  
Solution Culture ◽  
Tuber Initiation ◽  
Solution Ph ◽  
Constant Ph ◽  
Leaf Tissues ◽  
Hydroponically Grown ◽  
Potato Plantlets

Because tuberization in potatoes (Solarium tuberosum L.) reportedly is inhibited when stolons are immersed in liquid, this study was conducted to determine the effect of intermittent pH reductions of the nutrient solution on tuber induction of potatoes in solution culture. Tissue-culture potato plantlets were transplanted into solutions maintained at pH 5.5. The pH of the nutrient solution was changed to 3.5 and 4.0 for 10 hours on each of three dates (30, 35, and 40 days after transplanting). For the pH 3.5 treatment, tubers were observed first on day 42 and averaged 140 tubers per plant at harvest on day 54. For the pH 4.0 treatment, tubers were observed first on day 48 and averaged 40 tubers per plant at harvest. At a constant pH 5.5, tubers were observed on day 52 and averaged two tubers per plant at harvest. Plants with the intermittent pH 3.5 had smaller shoots and roots with shorter and thicker stolons compared to constant pH 5.5. With the intermittent pH 4.0, plants were of similar size, but stolons were shorter and slightly thickener compared to those from pH 5.5. Mineral composition of leaf tissues at harvest was similar for the three pH treatments. These results indicate that regulation of solution pH can be a useful technique for inducing tuberization in potatoes.

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