scholarly journals The effect of nitrogen and sulphur fertilization on the yield and content of sulforaphane and nitrates in cauliflower

2011 ◽  
Vol 59 (5) ◽  
pp. 17-22
Author(s):  
Nina Čekey ◽  
Miroslav Šlosár ◽  
Anton Uher ◽  
Zoltán Balogh ◽  
Magdaléna Valšíková ◽  
...  
Keyword(s):  
Field Experiment ◽  
The Other ◽  
Nitrate Content ◽  
Research Subject ◽  
Nitrate Accumulation ◽  
Health Promoting ◽  
Fertilization Effect ◽  
Control Variant ◽  
Data Point

In the field experiment with cauliflower, we investigated the effect of four different variants of nitrogen and suplhur fertilization on quantity and quality of cauliflower in the term of sulforaphane content and nitrate accumulation. The influence of fertilization was statistically significant between control variant and fertilization variants and in both experimental years within all parameters of cauliflower yield. The highest yield of cauliflower was reached at the variant 4 when it was fertilized on the level of nutrients N:S = 250:60 kg.ha−1. The increase of yield against control variant represented value 26.6%. The applied fertilization positively affected on the accumulation sulforaphane in the cauliflower. Its highest content was determined at the variant 4 (N:S = 250:60 kg.ha−1). In comparison with control variant, the sulforaphane content was increased about 18.4%. On the other side, applied nutrition resulted in increased accumulation of nitrates in the cauliflower. The most increase of nitrate content, compared to the control variant, was also ascertained at the variant 4 (about 31.4%).The gathered data point towards to the possibility and way how we could effect on the increased accumulation of sulforaphane in cauliflower florets. This sphere of fertilization effect on the sulforaphane content is not sufficiently explored well. Our aim is to continue in this research subject and to find way how to cultivate vegetables with higher content of health-promoting compounds.

scholarly journals The effect of Lignofert organic fertilizer on formation and quality of head lettuce yield

2011 ◽  
Vol 33 (No. 3) ◽  
pp. 114-118
Author(s):  
M. Valšíková ◽  
A. Viteková
Keyword(s):  
Biological Material ◽  
Organic Fertilizer ◽  
Field Conditions ◽  
Nitrate Content ◽  
Average Weight ◽  
Control Variant ◽  
Lettuce Yield ◽  
Soil Substrates

Nowadays soils for vegetable growing are poor in humus because the possibility of using stable dung is limited. The application of Lignofert organic carbonaceous fertilizer made of ground lignite seems to be a solution. It is intended as a fertilizer for the field or greenhouse growing of vegetables, as a component to composts, soil substrates and likewise. Lignofert effects on the formation of lettuce yield, weight of heads and NaNO<sub>3</sub> content were studied in 2003 to 2005. Head lettuce grown in a greenhouse and in field conditions was a biological material. Average lettuce yields and average weight of heads in 2005 were statistically highly significantly higher in variants with Lignofert in comparison with the control variant grown in the greenhouse and in the field. The Lignofert effect on nitrate content in lettuce heads was not proved statistically. &nbsp;

scholarly journals Yield and nutritional quality of greenhouse lettuce (Lactuca sativa L.) as affected by genotype and production methods

Genetika ◽  
2014 ◽  
Vol 46 (3) ◽  
pp. 1027-1036 ◽  
Author(s):  
Aleksandra Govedarica-Lucic ◽  
Mirjana Mojevic ◽  
Goran Perkovic ◽  
Branka Govedarica
Keyword(s):  
Lactuca Sativa ◽  
Nutritional Quality ◽  
Bare Soil ◽  
Production Method ◽  
Nitrate Content ◽  
The European Union ◽  
Production Methods ◽  
Lactuca Sativa L ◽  
Control Variant

Greenhouse experiments were conducted in winter growing seasons in order to evaluate the effects of genotype and production methods on yield and nutritional quality of lettuce (Lactuca sativa L.). A three-year (2009-2011) study was conducted by randomized block system in a greenhouse without additional heating. The trial included three genotypes of lettuce (Archimedes RZ, Santoro RZ, Kibou RZ). Each row with these genotypes was exposed to the following variants of covering: control-planting on bare soil, mulching before sowing with PE-black foil, agro textile-covering plants after planting with agro textile (17 g), a combination of mulching + agro textile. Throughout of all the three years of the trial, it was continuously evidenced that the genotype ?Santoro RZ? had the biggest heads and the highest yield (15.33 kg 10 m-2), which leads to conclusion that the yield of lettuce is a genotype characteristics. Moreover, the nutritional value (ascorbic acid concentration) has shown that, depending on the method of production, in average, the combination of mulching + agro textile (26.77 mg 100 g-1) had the highest content while the control variant had significantly lower vitamin C content (21.10 mg 100 g-1). The three-year researches have shown that the production method and genotype significantly affect the nitrate content. An average nitrate content was 2196.33 mg kg-1 on the control variant, and 2526.24 mg kg-1 on agro textile. Leafy lettuce of genotyp ?Kibou RZ? had lower nitrate content (2176.85 mg kg-1) compared to ?Archimedes RZ? (2843.05 mg kg-1) and ?Santoro RZ? (2221.37 mg kg-1). However nitrate concentration in all treatments remained within the European Union?s permissible levels.

scholarly journals Nitrate Content in Potatoes Cultivated in Contaminated Groundwater Areas

2013 ◽  
Vol 3 (1) ◽  
pp. 18 ◽  
Author(s):  
Alenka Hmelak Gorenjak ◽  
Davorin Urih ◽  
Tomaz Langerholc ◽  
Janja Kristl
Keyword(s):  
Sustainable Agriculture ◽  
Mean Value ◽  
Nitrate Content ◽  
Contaminated Groundwater ◽  
Nitrate Accumulation ◽  
Strict Adherence ◽  
Intensive Farming ◽  
Cultivated Potatoes ◽  
The One

<p>For a number of years Dravsko polje plain has been subject to intensive farming. Consequently, groundwater in this area is heavily contaminated with nitrates and pesticides. The goal of the study was to determine the quality of potatoes, based on nitrate levels cultivated in an area of contaminated groundwater. We also examined the influence of sustainable agriculture on the quality of crops. Nitrate content was determined using RP/HPLC/UV chromatography. Average nitrate content in potatoes cultivated on Dravsko polje plain was 157 mg/kg (range 18-429 mg/kg), which was not significantly different from the nitrate content in potatoes cultivated outside the contaminated area (mean value 145 mg/kg; range 28-448 mg/kg). In 18% of all samples, nitrate content exceeded maximum recommended levels. In potatoes cultivated via integrated production nitrate content did not significantly differ from the one in conventionally cultivated potatoes. In contrast, organic potatoes contained lower levels of nitrates (range 14-156 mg/kg). Our results also show that individual potato varieties are characterized by different trends of nitrate accumulation. Strict adherence to sustainable agriculture is reflected in lower levels of nitrate in potatoes.</p>

scholarly journals Application of Directly Brewed Compost Extract Improves Yield and Quality in Baby Leaf Lettuce Grown Hydroponically

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 370
Author(s):  
Almudena Giménez ◽  
Juan A. Fernández ◽  
José A. Pascual ◽  
Margarita Ros ◽  
Catalina Egea-Gilabert
Keyword(s):  
Nutrient Solution ◽  
Nitrate Content ◽  
Pythium Irregulare ◽  
Yield And Quality ◽  
Negative Effect ◽  
Floating System ◽  
Health Promoting ◽  
Leaf Lettuce ◽  
Compost Extract

The aim of this work was to study whether the application of a directly brewed compost extract (added in the nutrient solution or by microsprinkler) could be used to improve the yield and quality of baby leaf red lettuce growing in a floating system, and to control the incidence of Pythium irregulare. Its effect on the quality of fresh-cut red lettuce was also studied. For this, two experiments were carried out over two growing cycles (winter–spring and autumn). The results showed that the use of compost extract added to the nutrient solution improved baby leaf lettuce growth and quality, reducing the nitrate content and enhancing the content of potentially health-promoting compounds such as phenols and flavonoids and the antioxidant capacity. Microbial quality was maintained during storage and the compost extract had no negative effect on the microbial load of the final product. In addition, application of the compost decreased the population of P. irregulare in the water. It is concluded that the application of directly brewed compost extract is of potential use in a sustainable soilless production system for baby leaf red lettuce, since it improves the yield and quality of the product and is able to control the incidence of P. irregulare.

Impact of Different Organic Fertilizers on Soil Humus, Microbiomass and Quality of Cabbage

2014 ◽  
Vol 955-959 ◽  
pp. 628-632 ◽  
Author(s):  
Ji Jin Li ◽  
Chuan Zhang Li ◽  
Li Juan Gao ◽  
Ben Sheng Liu ◽  
Dong Sheng Liu ◽  
...  
Keyword(s):  
Organic Matter Content ◽  
Matter Content ◽  
Organic Fertilizers ◽  
Chicken Manure ◽  
Nitrate Content ◽  
Nitrate Accumulation ◽  
Soil Humus ◽  
Combined Application ◽  
High Level

A field experiment was conducted to determine effects of 6 treatments including without fertilization (CK), conventional fertilization (CM), corn straw plus manure (SM), peat plus chicken manure ( PM), mushroom residue plus chicken manure (MM) and high level of chicken manure (HM) on different soil active organic carbon and carbon pool management index. The results showed that fertilization of chicken manure is difficult to prompt activation of soil that contains plenty of fulvic acid, but combined application of different organic fertilizers not only can significantly increase the soil organic matter content, also can balance the proportion between the components of soil humus, improve Hu/Fu. Compared to CK treatment after fertilization, there was a narrow range in HA/TOC, FA/TOC, HM/TOC of HM treatment that was only 4%-8%, but variations of 12%-25% was produced by SM, PM, MM treatment, and its Hu/Fu increased 98% - 292% compared with HM treatment; The quantity of soil microorganisms is enhanced mostly by the treatment of HM, and the increase of bacteria and fungi was the maximum, but the quantity of actinomycetes was increased mostly by MM treatment; high level of chicken manure treatment can increase the risk of nitrate accumulation, but combined application of different organic fertilizers can significantly reduce the nitrate accumulation of vegetables, improving the quality of vegetables. Compared with HM treatment, MM treatment reduces the nitrate content of 45%. Therefore, the results demonstrated that paid attention to the selection of organic fertilizers and its combined application not only would achieve better fertilizing effect, also would better improve the quality of vegetables in organic agricultural production.

scholarly journals The Use of Phytohormones in Production of Fruit Tree Rootstocks in Nursery Without Irrigation

2019 ◽  
Vol 67 (2) ◽  
pp. 463-470
Author(s):  
Jan Wolf ◽  
Tomáš Kiss ◽  
Rostislav Venuta ◽  
Tomáš Nečas
Keyword(s):  
Fruit Tree ◽  
The Other ◽  
Seedling Height ◽  
Crown Root ◽  
Other Hand ◽  
Root Thickness ◽  
Control Variant ◽  
The Impact

The most commonly used phytohormone to reduce the impact of drought is 24‑epibrassinolide (EBR). In this study, EBR was applied over two years on young rootstocks of peach (B‑VA‑1) and myrobalan (Vanovice myrobalan) seedlings. Young rootstocks were treated by EBR at different concentrations, IAA and a mixture of EBR with IAA. The best results in seedling height of Vanovice myrobalan in both years had the treatment of 0.05% IAA, 549.69 mm (2016) and 553.77 mm (2017). On the other hand, on the crown root thickness was affected the most in 2016 by treatment of EBR 0.06 ppm (5.5 mm) and in 2017 by EBR 0.01 ppm (7.5mm). At B‑VA‑1 rootstock, the highest seedlings in 2016 were measured after EBR + IAA treatment (1573.18 mm) and in 2017 after IAA treatment (682.75 mm). The highest thickness of the crown root was recorded in 2016 after EBR and IAA (17.76 mm) and in 2017 after EBR 0.1 ppm (8.08 mm) treatments. At more than half of the treatments the control variant was evaluated as a variant with the least satisfying results. According to the results EBR and IAA are possibly increasing the quality of the rootstocks in conditions of a nursery without an irrigation.

scholarly journals The effect of chloride and nitrogen on nitrate accumulation and yield in beetroot (Beta vulgaris var. conditiva)

1992 ◽  
Vol 1 (3) ◽  
pp. 351-360
Author(s):  
Tapio Salo ◽  
Liisa Pietola ◽  
Raili Jokinen
Keyword(s):  
Field Experiment ◽  
Dry Matter ◽  
Early Stage ◽  
Matter Content ◽  
Pot Experiment ◽  
Nitrate Content ◽  
Dry Matter Content ◽  
High Nitrogen ◽  
Nitrate Accumulation ◽  
Growing Period

A pot and a field experiment were conducted to evaluate the effects of different nitrogen and chloride fertilizer levels on the nitrate content of beetroot. The yield and dry matter content were also determined. Sulphate fertilization was used as a control to chloride fertilization. There was a considerable decrease in the nitrate content of beetroots during the growing season. High nitrogen fertilization caused nitrate accumulation in both experiments. Chloride had a significant decreasing effect on the nitrate accumulation towards the middle of the growing period in the pot experiment. In the field experiment, chloride also decreased nitrate accumulation towards the middle of the growing period, soon after additional application of ammonium nitrate limestone (13.8 % NH4-N; 13.7 % NO3-N). Chloride tends to decrease nitrate accumulation only at an early stage of root development when nitrate is not the only source of nitrogen in the soil. The yield was higher on high nitrogen supply, in the pot experiment also on chloride application. Nitrogen decreased the dry matter content, but chloride had this effect only in the field experiment.

scholarly journals NITRATE ACCUMULATION IN LETTUCE AND ROCKET IN RESPONSE TO NITROGEN FERTILIZATION IN INTERCROPPING

2020 ◽  
Vol 33 (1) ◽  
pp. 260-265
Author(s):  
AURÉLIO PAES BARROS JÚNIOR ◽  
ARTHUR BERNARDES CECÍLIO FILHO ◽  
BRÁULIO LUCIANO ALVES REZENDE ◽  
HAMURÁBI ANIZIO LINS
Keyword(s):  
Block Design ◽  
Strong Association ◽  
Leafy Vegetables ◽  
Nitrate Content ◽  
Nitrate Accumulation ◽  
Lack Of Information ◽  
Randomized Block Design ◽  
Nitrogen Concentrations ◽  
N Dose

ABSTRACT In the cultivation of leafy vegetables, it is common to apply high amounts of nitrogen fertilizer. The imbalance between the absorption and the use of nitrogen (N) by the plant increases the nitrate content and decreases the quality of the vegetables because nitrate has a strong association with compounds harmful to human health. On the other hand, there is a lack of information on how N dose in intercropping, in order to improve yield, affects the quality (nitrate content) of vegetables. Thus, the objective of this study was to evaluate the nitrate content of intercropped lettuce and rocket, with nitrate content acting as a function of the nitrogen dose applied to these crops. The experiment was carried out at UNESP, Jaboticabal, SP, from September to December 2006. The experimental design was a complete randomized block design with four replications. The treatments were arranged in a 4 × 4 + 2 factorial scheme, with four varying concentrations of N each for lettuce and rocket (0, 65, 130 and 195 kg ha-1 of N), plus two treatments corresponding to lettuce and rocket monocrops. Nitrate content in lettuce under intercropping is 42% less compared to that in the monocrop. Increasing nitrogen concentrations increased nitrate levels for lettuce and rocket under intercropping; however, these levels are below those found for their respective monocrops.

scholarly journals Plant Microbial Biostimulants as a Promising Tool to Enhance the Productivity and Quality of Carrot Root Crops

2021 ◽  
Vol 9 (9) ◽  
pp. 1850
Author(s):  
Virgilija Gavelienė ◽  
Božena Šocik ◽  
Elžbieta Jankovska-Bortkevič ◽  
Sigita Jurkonienė
Keyword(s):  
Production Systems ◽  
Growth Yield ◽  
Nitrate Content ◽  
Maturation Stage ◽  
Average Weight ◽  
Nitrate Accumulation ◽  
Commercial Plant ◽  
Promising Tool ◽  
The Impact

The interest in studies focused on applying probiotic microorganisms is increasing due to sustainable agriculture development. In this research, we aimed to evaluate the impact of two commercial plant probiotics—ProbioHumus and NaturGel on carrot growth, yield, and quality in organic and nonorganic production systems. The research was carried out under laboratory and field conditions. Plants were treated with probiotics (2 L/ha) at the nine leaves stage. Biometrical measurements and chemical analyses were performed at a maturation stage. The average weight of carrot roots increased by 17 and 20 g in the test variant with ProbioHumus as compared to the control in the organic and nonorganic farms, respectively. Plant microbial biostimulants ProbioHumus and NaturGel had a positive effect on the quality of carrots from organic and nonorganic farms: applied in couple they promoted the accumulation of monosaccharides, ascorbic acid, carotenoids, phenols, and increased antioxidant activity. Quantitative nitrate analysis regardless of the biostimulant used revealed about twofold lower nitrate content of carrots from organic than nonorganic farms, and probiotics did not show a significant effect on nitrate accumulation. Finally, ProbioHumus and NaturGel were effective at low doses. The use of microbial biostimulants can be recommended as an element of cultivation for creating ecologically friendly technologies.

scholarly journals Quantity and quality of potato yield as influenced by unbalanced and excessive fertilization

1987 ◽  
Vol 59 (2) ◽  
pp. 131-139
Author(s):  
Markku Yli-Halla ◽  
Esko Viikari ◽  
Juha Palonen
Keyword(s):  
Starch Content ◽  
N Fertilization ◽  
Potato Yield ◽  
The Other ◽  
Nitrate Content ◽  
First Year ◽  
Minor Importance ◽  
Yield Formation ◽  
K Fertilization

Potato (var. Rekord) was cultivated for three years in a sandy field. It was given various levels of three fertilizers the N, P and K composition of which in percentages was 7-11-12, 18-3-12 and 27.5-0-0. The N levels were 0, 80/60, 140/120 and 300/240 kg/ha (1983/1984-85), but the P and K levels varied according to the composition of the fertilizers. In the first year the yields were high regardless of fertilization. The following years the yields were clearly highest in the plots where the fertilizer 7-11-12 was used. This was due to insufficient P and K supply in the other plots. With increasing N fertilization the starch content and mealiness of the tubers decreased and the flavor was degraded. The two higher N levels yielded a considerably higher nitrate content than was measured in tubers from unfertilized plots and those receiving the lowest levels of fertilizers. The present results point out the significance of appropriate N fertilization for potato. A certain N amount was necessary to produce a quantitatively satisfactory yield but excessive amounts had an adverse effect on the quality. P and K were of minor importance for the quality in this experiment, but abundant P and K fertilization was needed for optimum yield formation. Maintenance of soil K level proved difficult in continuous potato cultivation.

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