Comparison of hydroponic culture and culture in a peat/sand mixture and the influence of nutrient solution and plant density on seed potato yields

1997 ◽  
Vol 40 (4) ◽  
pp. 431-438 ◽  
Author(s):  
J. Muro ◽  
V. Díaz ◽  
J. L. Goñi ◽  
Carmen Lamsfus
Keyword(s):  
Seed Potato ◽  
Nutrient Solution ◽  
Plant Density ◽  
Hydroponic Culture ◽  
Sand Mixture ◽  
Potato Yields

scholarly journals Electrical conductivity of the nutrient solution and plant density in aeroponic production of seed potato under tropical conditions (winter/spring)

Bragantia ◽  
2017 ◽  
Vol 76 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Alex Humberto Calori ◽  
Thiago Leandro Factor ◽  
José Carlos Feltran ◽  
Eduardo Yuji Watanabe ◽  
Carolina Cinto de Moraes ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Experimental Design ◽  
Seed Potato ◽  
Nutrient Solution ◽  
Plant Density ◽  
Tropical Conditions ◽  
Electrical Conductivities ◽  
Plant Densities ◽  
Hydroponic Systems ◽  
Plot Design

ABSTRACT The recent introduction in Brazil of production of quality seed potatoes in hydroponic systems, such as aeroponics, demands studies on the nutritional and crop management. Thus, this study evaluated the influence of electrical conductivity of the nutrient solution and plant density on the seed potato minitubers production in aeroponics system. The Agata and Asterix cultivars were produced in a greenhouse under tropical conditions (winter/spring). The experimental design was a randomized block in a split-split plot design. The plot consisted of 4 electrical conductivities of the nutrient solution (1.0; 2.0; 3.0; and 4.0 dS∙m−1); the subplot, of 4 plant densities (25; 44; 66; and 100 plants∙m−2); and the subsubplot, of the 2 potato cultivars (Ágata and Asterix), totaling 4 blocks. The 2.2 and 2.1 dS∙m−1 electrical conductivities yielded the highest productivity of seed potato minitubers, for Ágata and Asterix cultivars, respectively, regardless of plant density. For both cultivars, the highest yield was observed for the 100 plants∙m−2 density.

Toxicity and bioaccumulation potential of Cr (VI) and Hg (II) on differential concentration by Eichhornia crassipes in hydroponic culture

2011 ◽  
Vol 63 (5) ◽  
pp. 899-907 ◽  
Author(s):  
A. K. Giri ◽  
R. K. Patel
Keyword(s):  
Metal Ions ◽  
Nutrient Solution ◽  
Mercuric Chloride ◽  
Concentration Factor ◽  
Eichhornia Crassipes ◽  
Aquatic Plant ◽  
Potassium Dichromate ◽  
Dry Weight ◽  
Hydroponic Culture ◽  
Relative Growth

In this work, the phytoremediation of Cr (VI) and Hg (II) ion from water by an aquatic plant Eichhornia crassipes has been studied. Plants were cultured in a double distillated water with modified Hoagland’s nutrient solution at pH 6.8 supplemented with 0, 0.75, 1.50, 2.50, and 4 mg Cr/L as potassium dichromate (K2Cr2O7) and 0, 5, 10, 15, and 20 mg Hg/L as mercuric chloride (HgCl2). They were separately harvested after 3, 6 and 9 days. Plants treated with 4 mg/L of Cr (VI) accumulated the highest concentration of metal in roots (1.22 mg/g, dry weight) and shoots (0.24 mg/g, dry weight) after 9 days; while those treated with 20 mg/L of Hg (II) accumulated the highest concentration of metal in roots (4.22 mg/g, dry weight) and shoots (2.43 mg/g, dry weight) after 9 days. Eichhornia crassipes biomass was characterised using AAS, SEM and FTIR. The accumulation and relative growth of metal ions at different concentrations of chromium and mercury solution significantly increased (P<0.05) with the passage of time. The maximum values of bio-concentration factor (BCF) for Cr (VI) and Hg (II) were found to be 413.33 and 502.40 L/kg respectively.

Sterilization of nutrient solution by ultraviolet light in hydroponic culture

1989 ◽  
Vol 73 (Appendix) ◽  
pp. 145-146
Author(s):  
Shinichi Kusakari ◽  
Kimitoshi Horaguchi ◽  
Masaaki Morita
Keyword(s):  
Ultraviolet Light ◽  
Nutrient Solution ◽  
Hydroponic Culture

scholarly journals CONTINUOUS USE OF PLANT NUTRIENT SOLUTION FOR HYDROPONIC CULTURE OF SWEETPOTATO:IMPLICATIONS AND EFFECTS

HortScience ◽  
1994 ◽  
Vol 29 (7) ◽  
pp. 731d-731
Author(s):  
A.A. Trotman ◽  
P.P. David ◽  
D.G. Mortley ◽  
G.W. Carver
Keyword(s):  
Plant Growth ◽  
Nutrient Solution ◽  
Hydroponic Culture ◽  
Root Production ◽  
Plant Nutrient ◽  
Storage Root ◽  
Root Yield ◽  
Solution Composition ◽  
Greenhouse Study ◽  
Continuous Use

In a greenhouse study, continuous use of the same plant nutrient solution for hydroponic culture of sweetpotato was investigated to determine the effect on storage root yield, plant growth and nutrient solution composition. Plants were grown for 120 days under continuous flow from a 30.4-liter reservoir. Plant growth was compared when nutrient solution was changed at 14-day intervals and when nutrient solution was not changed but nutrients replenished through addition of a Modified half-Hoagland's (N:K=1:2.4) plant nutrient solution when volume in reservoir was -10 liters. Storage root yield was significantly decreased (181 vs 310.3 g/plant) and foliar biomass was significantly increased (372.4 vs 2% g/plant) when nutrient solution was not changed Nitrate and phosphate concentrations decreased in the plant nutrient over the duration of the experiment while sulfate and chloride concentrations increased. Salinity and electrical conductivity were monitored at 2-day intervals and increased with duration of the crop. Increased foliage production may have been the result of nitrogen replenishment going largely for foliage rather than storage root production. It may be that continuous use of the same plant nutrient solution as practiced in this study, resulted in lowered phosphate and nitrate concentrations that limited uptake of these ions by sweetpotato plants, thus reducing yield

scholarly journals Influence of increased doses of microelements in hydroponic nutrient solution on the yield of Capsicum annuum L. fruits and their capsaicin content

2013 ◽  
Vol 33 (1) ◽  
pp. 73-80 ◽  
Author(s):  
Tomasz J. Nowak
Keyword(s):  
Capsicum Annuum ◽  
Plant Species ◽  
Nutrient Solution ◽  
Dry Matter ◽  
Hydroponic Culture ◽  
Capsicum Annuum L ◽  
Standard Composition

The Wrocław version of hydroponic culture was applied. The content of particular microelements (Cu, B, Mn, Mo, Zn) or several of them jointly was increased ten times (to 6 mg/l) as compared to the standard composition of the nutrient solution. It was found that the yield of fruits and of capsaicin per plant was significantly higher with 10 times increased content of Cu and B or Cu+B+Mo or Cu+Mn+Mo or B+Mn+Mo. Moreover, Cu and Mn applied alone or in combinations with other microelements in 10-fold increased proportion caused a marked increase of capsaicin content in the dry matter of the fruit. It is suggested that the proportions of microelements should be chosen individually for each plant species and for each type of agroclimatic conditions

scholarly journals 540 Influence of Calcium Nutrition on Growth and Tissue Electrolyte Leakage in Carrot (Daucus carota)

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 488E-488
Author(s):  
Keun Ho Cho ◽  
Chiwon W. Lee ◽  
Larry J. Cihacek ◽  
Robert W. Stack ◽  
Hoon Kang
Keyword(s):  
Nutrient Solution ◽  
Daucus Carota ◽  
Electrolyte Leakage ◽  
Culture System ◽  
Experimental Period ◽  
Hydroponic Culture ◽  
Calcium Nutrition ◽  
Tap Root ◽  
Hydroponically Grown ◽  
Nutrient Solutions

The influence of calcium (Ca++) nutrition on the growth and root tissue electrolyte leakage (EL) of carrot (Daucus carota) was investigated using a hydroponic culture system. Seedlings of `Navajo' carrot were grown for 10 weeks with roots submersed in hydroponic nutrient solutions containing 0, 0.1, 1, 2, 4, or 8 meq/L Ca++. The nutrient solution was replenished weekly with its pH maintained at 5.8 for the entire experimental period. The tap root lengths increased as solution Ca++ concentration increased. The diameter and fresh and dry weights of the tap roots increased as Ca++ concentration increased up to 4 meq/L, and then decreased at 8 meq/L Ca++. The root and petiole concentrations of sugar, potassium, and nitrate were unaffected by changes in nutrient solution Ca++ levels. The tissue EL, when tested for the stored roots, decreased as solution Ca++ concentration increased (r = 0.602). Results of this experiment suggest that calcium nutrition is essential for maintaining cell wall integrity in hydroponically grown carrot roots.

scholarly journals Nitrogen concentration in dry matter of the fifth leaf during growth of greenhouse tomato plants

2002 ◽  
Vol 20 (4) ◽  
pp. 626-629 ◽  
Author(s):  
Jorge E. Rattin ◽  
Jerônimo L. Andriolo ◽  
Márcio Witter
Keyword(s):  
Nutrient Solution ◽  
Dry Matter ◽  
Plant Density ◽  
Nitrogen Nutrition ◽  
Nitrogen Concentration ◽  
Dry Matter Accumulation ◽  
Iron Chelate ◽  
Greenhouse Tomato ◽  
N Concentration ◽  
Commercial Mixture

The nitrogen concentration in dry matter of the fifth leaf during growth of a greenhouse tomato crop was determined. Plants of hybrid Monte Carlo were grown in 4.5 L bags, using a commercial substrate, in a plant density of 3.3 plants m-2. A nutrient solution containing, in mmol L-1: KNO3, 4.0; K2SO4, 0.9; Ca(NO3)2, 3.75; KH2PO4, 1.5; MgSO4, 1.0; iron chelate 19. 10³, was used as reference. Microelements were added by a commercial mixture. The T3 treatment was equal to the reference nutrient solution, whereas in treatments T1, T2, T4 and T5 quantities of all nutrients from T3 were multiplied by 0.25, 0.50, 1.25 and 1.50, respectively. In each treatment, the volume of 1 L of nutrient solution was supplied to each plant once a week by fertigation. Periodically destructive measurements were made from anthesis to ripening of the first truss, to determine dry matter and N concentration in shoot and in fifth leaf tissues, counted from the apex to the bottom of the plant. Five dilution curves were fitted from data of N concentration in the fifth leaf and shoot dry matter accumulation during growth of plants. A general relationship was adjusted between actual N concentration in shoot (Nt) and in the fifth leaf (Nf): Nt = 1.287 Nf (R² = 0.80). This relationship could be used to estimate the N status of plants by means of a nitrogen nutrition index (NNI), from analysis of the fifth leaf sap.

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