scholarly journals The effect of different forms of nitrogen fertilization on the crop, vitamin C content and carbohydrates content of savoy (Brassica oleracea var. sabauda L.)

2013 ◽  
Vol 33 (1) ◽  
pp. 51-58
Author(s):  
Emilia Mokrzecka
Keyword(s):  
Vitamin C ◽  
Brassica Oleracea ◽  
Nitrogen Fertilization ◽  
Pot Experiment

The effect of fertilization of savoy with (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>, Ca(NO<sub>3</sub>)<sub>2</sub>, NH<sub>4</sub>NO<sub>3</sub> and CO(NH<sub>2</sub>)<sub>2</sub> on the crop, vitamin C content and carbohydrates content was investigated in a pot experiment. The largest crop and the lowest vitamin C content was found with Ca(NO<sub>3</sub>)<sub>2</sub>. The plants fertilized with CO(NH<sub>2</sub>)<sub>2</sub> showed the highest content of carbohydrates.

Effect of nitrogen fertilization on head size, vitamin C content and storage life of broccoli (Brassica oleracea var. Italica)

1994 ◽  
Vol 74 (3) ◽  
pp. 607-610 ◽  
Author(s):  
Peter M. A. Toivonen ◽  
B. J. Zebarth ◽  
P. A. Bowen
Keyword(s):  
Vitamin C ◽  
Brassica Oleracea ◽  
Nitrogen Fertilization ◽  
Fertilization Rate ◽  
Climatic Conditions ◽  
Head Size ◽  
First Year ◽  
Nitrogen Application ◽  
Application Rates ◽  
And Storage

Broccoli quality in British Columbia can vary with season and with the farm site on which it is grown. One major management difference between farms is nitrogen fertilization rate. This work was conducted to determine the effect of nitrogen fertilization (0, 125, 250, 375, 500 and 625 kg N ha−1) and growing season (three plantings in 2 consecutive years) on vitamin C content, head size and storability of broccoli (Brassica oleracea var. Italica, 'Emperor'). The climatic conditions during crop growth and development had a greater overall effect on vitamin C content, head diameter and head weight than nitrogen fertilization. Weight and vitamin C losses during storage in the first year were not affected by nitrogen fertilization rates. Moderate nitrogen application rates of 125 and 250 kg N ha−1 in all three plantings produced a head size considered optimal for marketing. Key words: Postharvest, vegetable quality, climatic conditions

Quantification of glucosinolates, anthocyanins, free amino acids, and vitamin C in inbred lines of cabbage (Brassica oleracea L.)

2014 ◽  
Vol 145 ◽  
pp. 77-85 ◽  
Author(s):  
Suhyoung Park ◽  
Mariadhas Valan Arasu ◽  
Min-Ki Lee ◽  
Jin-Hyuk Chun ◽  
Jeong Min Seo ◽  
...  
Keyword(s):  
Amino Acids ◽  
Vitamin C ◽  
Brassica Oleracea ◽  
Free Amino Acids ◽  
Free Amino ◽  
Inbred Lines ◽  
Brassica Oleracea L

scholarly journals Uji aktivitas Antioksida Ekstrak Etanol Bunga Brokoli (Brassica oleracea L. Var Italica) dengan Metode DPPH (2,2-difenil-1-pikrihidrazil)

2019 ◽  
Author(s):  
sinardi ◽  
Rahmawati ◽  
A. Sry Iryani
Keyword(s):  
Vitamin C ◽  
Brassica Oleracea ◽  
Brassica Oleracea L

Brokoli (Brassica oleracea L. Var. Italica) merupakan salah satu tanamanbudidaya sayuran yang masuk kedalam familia Brassicecae. Tujuan penelitianini adalah untuk mengetahui aktivitas antioksidan ekstrak etanol bunga brokoli denganmetode DPPH (2,2-difenil-1-pikrihidrazil). Bunga brokoli diekstraksi secara maserasi menggunakan pelarut etanol, Ekstrak Bunga brokoli dibuat dalam berbagaikonsentrasi dan uji aktivitas antioksidan. Dimana nilai IC 50 ditentukan dengan menghitung analisis regresi terhadap ekstrak etanol bunga brokoli dan vitamin C.Dimana hasil uji fitokimia dari ekstrak etanol bunga brokoli (Brassica oleracea L. Var. Italica) Mengandun g senyawa fenol dan flavonoid. Nilai IC 50 dari ekstrak bunga brokoli (Brassica oleracea L. Var. Italica) sebesar 4998,1 ppm dan IC 50 vitamin C murni 4542,73 ppm memperlihatkan aktivitas antioksidan sangat lemah (IC 50 &gt;200 ppm).

scholarly journals SULFORAPHANE POTENTIAL AND VITAMIN C CONCENTRATION IN DEVELOPING HEADS AND LEAVES OF BROCCOLI (BRASSICA OLERACEA VAR. ITALICA)

2003 ◽  
Vol 26 (6) ◽  
pp. 523-530 ◽  
Author(s):  
MARIA BOTERO OMARY ◽  
ERNESTO A. BROVELLI ◽  
DONALD J. PUSATERI ◽  
PURI DAVID ◽  
JAMES W. RUSHING ◽  
...  
Keyword(s):  
Vitamin C ◽  
Brassica Oleracea

scholarly journals Force to Shear the Stalk, Stalk Diameter, and Yield of Broccoli in Response to Nitrogen Fertilization and Within-row Spacing

1991 ◽  
Vol 116 (2) ◽  
pp. 222-227 ◽  
Author(s):  
Brian A. Kahn ◽  
Phillip G. Shilling ◽  
Gerald H. Brusewitz ◽  
Ronald W. McNew
Keyword(s):  
Brassica Oleracea ◽  
High Temperatures ◽  
Nitrogen Fertilization ◽  
N Fertilization ◽  
Significant Response ◽  
Lower Percentage ◽  
Row Spacing ◽  
Water Deficits ◽  
Stalk Diameter ◽  
Head Weight

Broccoli [Brassica oleracea L. (Italica Group)] crops may be rejected by wholesale buyers due to unacceptably tough stalks. Four experiments were conducted to examine the effects of various N levels and two within-row spacings (15 and 30 cm) on force to shear the stalk, stalk diameter, and yield of transplanted `Premium Crop' broccoli. Shear was not affected by within-row spacing, and average stalk diameter was decreased only 3 mm by reducing spacing from 30 to 15 cm. Although the 15-cm spacing sometimes produced the greatest total number of marketable, heads, this spacing resulted in higher cull head production, lower average marketable head weight, delayed maturity, and a lower percentage of field-planted transplants producing marketable heads than the 30-cm spacing. Increasing N fertilization decreased force to shear the stalk in only one experiment, when plants were exposed to water deficits and high temperatures. Nitrogen affected stalk diameter only when very low rates (37 and 74 kg·ha-1) were included. Yield of marketable-quality heads often showed no significant response to rates of applied N >112 kg·ha-1, particularly at the 30-cm spacing. Hollow stem was negligible in all experiments.

scholarly journals ASSESSMENT OF MINERAL NUTRIENT IMPACT ON METABOLITES ACCUMULATION IN KALE (BRASSICA OLERACEA VAR. SABELLICA)

2021 ◽  
Vol 13 (3) ◽  
pp. 208-224
Author(s):  
Joyce D. Anteh ◽  
Olga A. Timofeeva ◽  
Antonina A. Mostyakova
Keyword(s):  
Phenolic Compounds ◽  
Vitamin C ◽  
Brassica Oleracea ◽  
Phenolic Compound ◽  
Soluble Sugar ◽  
Mineral Nutrients ◽  
Mineral Nutrient ◽  
Health Promoting ◽  
Scientific Attention ◽  
The Impact

Green leafy kale (Brassica oleracea var. sabellica) has huge scientific attention because of its health-promoting functionality. In the present study the impact of NPK, energen, biostim and humate on flavonoid, phenolic compounds, vitamin C, carotenoids, malondialdehyde (MDA), protein, proline and soluble sugar in kale was investigated. The mineral nutrients mostly increased but in some cases maintained the studied metabolites. The stimulatory effect of applied mineral nutrients on the phytochemicals analyzed varied with the different combinations of macro and microelements. Lipid peroxidation was minimized in leaves treated with mineral nutrients hence a reduction in MDA levels. Contrary to the correlation between nitrogen deficiency and increase in polyphenol and vitamin C content in plants, NPK and biostim did not reduce phenolic compound levels. The results of this study showed that NPK maximized the synthesis of vitamin C and proline; energen - phenolic compounds, carotenoids and sugar; biostim – phenolic compounds, proteins and sugar; humate – flavonoids and sugar in curly kale. Therefore, the type of macronutrient and micronutrients combination increases phytochemicals in differently. To enhance the synthesis of phenolic compounds and vitamins, the most promising additives are those containing humic acids (humate and energen), and biostim proved to be more effective for the synthesis of proteins. Background. The understanding of how diet affects the incidence or treatment of disease has led to a rise in consumer’s demand for functional foods as well as created the market for natural sources of health benefitting compounds rather than the synthetic sources. Curly kale has gained scientific attention as a functional food because it contains higher levels of phytochemicals than most vegetables. These phytochemicals have shown antioxidant, antimutagenic, cytotoxic, antifungal, and antiviral activities. However, the content levels of these metabolites are influenced by not only genetic but environmental factors. It was of interest to evaluate how various mineral nutrients can elicit the accumulation of these compounds that minimize the risk of chronic diseases or aid in their treatment. Purpose. Evaluate how the mineral nutrients, NPK, energen, biostim and humate affect the content of metabolites (proteins, sugars, flavonoids, phenolic compounds, vitamin C, carotenoids, MDA and proline) in curly kale (Brassica oleracea var. sabellica). Materials and methods. Sprouts from kale seed kept wet in a Petri dish for 7 days were transferred to the field. At 6 weeks old four mineral nutrients (NPK, energen, humate and biostim) were added to the soil. Control variants were treated with water. A week later, the leaves were harvested after which, the phenolic compound, flavonoid, protein, sugar, vitamin C, carotenoid, MDA and proline contents were determined using spectrophotometric methods. Results. It was shown that humate fertilizer elicited the highest accumulation of flavonoids. Kale plants fertilized with energen were observed to have the highest phenolic compound content. NPK, energen and humate caused a similarly positive effect on vitamin C content in leaves, unlike biostim whose effect did not significantly differ from control plants. Energen treated kale had the highest increment of carotenoids. A varied reduction of MDA levels in plants treated with all four mineral nutrients was observed in kale leaves. Plants fertilized with biostim accrued the highest protein content in leaves. Proline content increased under the influence of all fertilizers studied. Sugar levels for all kale plants treated with the studied mineral nutrients were enhanced equally Conclusion. Macro and microelements supplied by mineral nutrients differentially boost the biosynthesis of health-promoting metabolites in curly kale, thereby enhancing its quality.

scholarly journals Effect of added magnesium, potassium, lime and nitrogen on oats: II. Nutrient contents, cation ratios and magnesium uptake

1977 ◽  
Vol 49 (4) ◽  
pp. 296-314
Author(s):  
Raili Jokinen
Keyword(s):  
Nitrogen Fertilization ◽  
Magnesium Deficiency ◽  
Peat Soil ◽  
Calcium Content ◽  
Magnesium Content ◽  
Potassium Content ◽  
Pot Experiment ◽  
Nutrient Contents ◽  
Potassium Fertilization ◽  
Magnesium Uptake

In a pot experiment on sphagnum peat soil the magnesium fertilization increased significantly the magnesium content of the grains and the straws of oats. The addition of potassium fertilization decreased the magnesium content when the plants received a magnesium fertilization. Without magnesium the rate of potassium fertilization did not have an effect on the magnesium content of the straws. The increase in the equivalent ratio of the three potassium rates and the two magnesium rates decreased the magnesium content of both the grains and the straws. Along with the magnesium fertilization the addition of lime decreased the magnesium content of the grains and increased that of the straws. Doubling the amount of the nitrogen fertilization with the magnesium fertilizer increased the magnesium content of the grains and the straws. In the case of magnesium deficiency the addition of lime or nitrogen did not have an effect on the magnesium content of the yields. The rate of magnesium, potassium, lime and nitrogen did not have an effect on the potassium content of the grains. The potassium content of the straws increased with the addition of potassium. Without the magnesium fertilization the potassium content, as well as, the ratios K/Mg and K/(Ca + Mg) in the grains and the straws were high. A part of the missing magnesium had, perhaps, been substituted for by potassium. The calcium content of the grains and the straws obtained without magnesium fertilization was significantly higher than the calcium content with magnesium fertilization. The oats substituted possibly in part also calcium for the missing magnesium. The effect of added magnesium, potassium, lime and nitrogen on the magnesium uptake by oats was discussed.

Sign in / Sign up

Export Citation Format

Share Document