scholarly journals Effects of Nitrogen Fertilization Levels in Nutrient Solution Applied before/after Flower Budding on Blasting in Winter-flowering of Eustoma grandiflorum (Raf.) Shinn.

2010 ◽  
Vol 9 (2) ◽  
pp. 191-196 ◽  
Author(s):  
Ayuko Ushio ◽  
Naoko Fukuta
Keyword(s):  
Nutrient Solution ◽  
Nitrogen Fertilization ◽  
Eustoma Grandiflorum

scholarly journals Determination of the Optimal Nitrogen Content in a Fertigation Medium for the Greenhouse Cucumber Grown on Slabs of Compressed Straw

2009 ◽  
Vol 71 (1) ◽  
pp. 79-87 ◽  
Author(s):  
Józef Babik ◽  
Waldemar Kowalczyk
Keyword(s):  
Nitrogen Content ◽  
Nutrient Solution ◽  
Nitrogen Fertilization ◽  
Research Work ◽  
Growing Season ◽  
Cultivation Period ◽  
Greenhouse Cucumber ◽  
Cucumber Yield

Determination of the Optimal Nitrogen Content in a Fertigation Medium for the Greenhouse Cucumber Grown on Slabs of Compressed StrawIn the years 2004-2008, research work was carried out whose aim was to determine the optimal nitrogen fertilization dose for greenhouse cucumbers grown on mats made of compressed, finely shredded straw. In the experiments, the short-fruited variety of the greenhouse cucumber, Milenium F1, was used. The level of nitrogen in the nutrient solution was varied in the range of 200-350 mg·dm-3. The nitrogen content in the solution in the amount of 200 mg·dm-3was not sufficient and caused the cucumber yield to fall. The increasing N concentrations in the medium were found to have a significant effect on the nitrogen content in the indicator parts of cucumber plants. The highest nitrogen content was found in the plants fertilized with a nutrient solution containing the highest concentration of N-NO3, which was 350 mg·dm-3. Cucumber plants grown on straw need to be more intensely fertilized with nitrogen for about 1/3 of the growing season, and then to have its level in the fertigation medium reduced for the remaining part of the cultivation period.

scholarly journals Physiological Responses to N-NO3 and N-NH4 of Triazine Resistant and Susceptible Plants of Horseweed (Erigeron canadensis L.)

2013 ◽  
Vol 46 (1) ◽  
pp. 5-14
Author(s):  
Ryszard Stanek
Keyword(s):  
Nitrogen Source ◽  
Nutrient Solution ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Dark Respiration ◽  
Physiological Responses ◽  
Controlled Conditions ◽  
Erigeron Canadensis ◽  
Horticultural Practice ◽  
Better Than

Triazine resistant and susceptible biotypes of horseweed (<i>Erigeron canadensis</i> L.) were grown under controlled conditions in nutrient solution with NH<sub>4</sub> or NO<sub>3</sub> ions as nitrogen source. Indicators such as: dry matter, CO<sub>2</sub> assimilation, chloroplasts activity, dark respiration and the content of K, Ca, Mg in the above ground parts displayed lower levels when plants were fed with NH<sub>4</sub> than with NO ions. Reduction of these indicators was stronger for the triazine susceptible plants which grew better than their resistant counterparts when fed with N-NO<sub>3</sub>. The triazine resistant plants grown with N-NH<sub>4</sub> contained more protein-N and K than the susceptible ones. Chloroplasts of the resistant plants were also less sensitive to NH<sub>4</sub>CL treatment. It is concluded that the resistant plants appear to be more tolerant to NH<sub>4</sub> ions as compared with their susceptible counterparts. For this reason application of ammonium forms of nitrogen fertilization in horticultural practice could favour spreading of triazine resistant horseweed.

scholarly journals Tipburn Incidence and Ca Acquisition and Distribution in Lisianthus (Eustoma grandiflorum (Raf.) Shinn.) Cultivars under Different Ca Concentrations in Nutrient Solution

Agronomy ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 216 ◽  
Author(s):  
Takanori Kuronuma ◽  
Masaya Ando ◽  
Hitoshi Watanabe
Keyword(s):  
Nutrient Solution ◽  
Eustoma Grandiflorum ◽  
Ca Deficiency

Tipburn (calcium (Ca) deficiency disorder) is a major problem in the production of lisianthus cultivars. However, few studies have investigated the influence of different Ca concentrations in nutrient solution on tipburn incidence and Ca acquisition and distribution. Thus, it remains unclear why some cultivars exhibit tipburn under high Ca concentrations. To address this, we used three lisianthus cultivars ‘Azuma-no-Kaori’ (AK), ‘Celeb Wine’ (CW), and ‘Voyage Yellow’ (VY) and compared tipburn incidence and Ca acquisition and distribution under different Ca concentrations in a nutrient solution (low (40 ppm), moderate (80 ppm), and high (120 ppm) Ca). Tipburn severity and incidence in AK and VY significantly decreased with increasing nutritional Ca concentrations; the Ca concentrations in each organ and Ca acquisition competence (RGRCa) increased at higher nutritional Ca concentrations. In contrast, tipburn incidence in CW was 100% for all treatments. In CW, Ca acquisition competence and Ca concentrations in most organs increased with increasing nutritional Ca concentrations, but the Ca concentrations in the tips of the upper leaves did not differ significantly between treatments. Thus, our results suggest that the cause of tipburn under sufficient Ca conditions is an inability of the plant to distribute Ca to the tips of its upper leaves.

OPTIMISATION OF THE NUTRIENT SOLUTION FOR EUSTOMA GRANDIFLORUM IN SOILLESS CULTURE

1995 ◽  
pp. 401-408 ◽  
Author(s):  
M.C. van Labeke ◽  
P. Dambre ◽  
E. Schrevens ◽  
G. de Rijck
Keyword(s):  
Nutrient Solution ◽  
Soilless Culture ◽  
Eustoma Grandiflorum

The influence of nitrogen fertilization on protein yield and nutrient uptake in different triticale genotypes

2007 ◽  
Vol 35 (2) ◽  
pp. 253-256
Author(s):  
Milan Biberdžić ◽  
Ivica Đalović ◽  
Aleksandar Paunović ◽  
Ilija Komljenović
Keyword(s):  
Nutrient Uptake ◽  
Nitrogen Fertilization ◽  
Protein Yield

Quality of Carrots Grown for Processing as Affected by Nitrogen Fertilization and Harvest Term

2009 ◽  
Vol 70 (1) ◽  
pp. 135-144 ◽  
Author(s):  
Marek Gajewski ◽  
Zenon Węglarz ◽  
Anna Sereda ◽  
Marta Bajer ◽  
Agnieszka Kuczkowska ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Carrot Juice ◽  
Harvest Time ◽  
Experimental Station ◽  
Colour Parameters ◽  
Solids Content ◽  
Nitrates Content

Quality of Carrots Grown for Processing as Affected by Nitrogen Fertilization and Harvest TermIn 2007-2008 the effect of nitrogen fertilization and harvest term on quality of two carrot cultivars was investigated. The field experiment was carried out in Żelazna Experimental Station of Warsaw University of Life Sciences. Karotan F1and Trafford F1cultivars, commonly grown for juice industry, were the objects of the experiment. Carrot seeds were sown at the beginning of May. Nitrogen fertilization was applied in five rates, ranged from 0 to 120 kg·ha-1and in two terms — before sowing and in the middle of growing season. Roots were harvested in three terms: mid-September, mid-October and the first decade of November. After harvest there were determined: nitrates (NO3) content in carrot roots and juice, soluble solids, colour parameters of juice in CIE L*a*b*system. The dose and the term of nitrogen fertilization influenced nitrates content in carrots, and the highest NO3concentration was found in carrots fertilized with 120 kg·ha-1of N before sowing. Karotan showed higher nitrates accumulation than Trafford. The content of nitrates in the roots was markedly higher than in carrot juice. Nitrates content in carrots decreased with delaying of harvest time, in opposite to soluble solids content. Soluble solids content and colour parameters of carrot juice were not affected by nitrogen fertilization, but the lowest L*, a*and b*values were observed at the last term of harvest.

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