Effects of conventional and organic fertilization on spinach (Spinacea oleracea L.) growth, yield, vitamin C and nitrate concentration during two successive seasons

2010 ◽  
Vol 126 (4) ◽  
pp. 415-420 ◽  
Author(s):  
Sedat Citak ◽  
Sahriye Sonmez
Keyword(s):  
Vitamin C ◽  
Nitrate Concentration ◽  
Growth Yield ◽  
Organic Fertilization ◽  
Spinacea Oleracea

scholarly journals Çukurova Bölgesi Koşullarında Farklı Zamanlarda Ekimi Yapılan Brüksel Lahanalarında Bitki Gelişimi, Verim ve Baş Kalitesi

2019 ◽  
Vol 7 (7) ◽  
pp. 1062
Author(s):  
İbrahim Burak Yılmaz ◽  
Nebahat Sarı
Keyword(s):  
Vitamin C ◽  
Antioxidant Capacity ◽  
Plant Height ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Growth Yield ◽  
The Other ◽  
Total Phenolic ◽  
Brussels Sprout ◽  
Main Shoot

In this study, plant growth, yield and sprout quality were investigated by planting at three different periods in three different Brussels sprout varieties in Çukurova Region. In this research, the effects of four different sowing and planting times on plant height (cm), main shoot diameter (mm), leaf number (number/plant), yield (g/m2), sprout weight (g), sprout diameter (mm), sprout height (mm), vitamin C (mg/100 g), antioxidant capacity [μmol trolox equivalents (TE)/g] and total phenolic content [mg gallic acid equivalent (GAE)/100 g] were investigated in Franklin Fı, Maximus Fı and Divino Fı Brussels sprout varieties. According to the research results; Maximus Fı variety was found to be longer, thicker and more leafy than the other varieties in terms of plant height, main shoot diameter and number of leaves. Based on yield, Maximus Fı variety was recorded to be more efficient (584.88 g/m2) than the other varieties (367.97 g/m2 and 259.82 g/m2 in Franklin Fı and Divino Fı, respectively). Maximus Fı was superior than the other Brussels sprout varieties, Franklin Fı and Divino Fı in terms of sprout weight, sprout diameter and sprout height. When the planting times were evaluated, it was recorded that the 1st period was more suitable in terms of both yield and sprout characteristics compared to the other periods. In the vitamin C content, antioxidant capacity and total phenolic content, Franklin Fı was showed higher rates than the other varieties and more nutrient content was detected in the late plantings.

scholarly journals Production and quality of okra produced with mineral and organic fertilization

2019 ◽  
Vol 23 (2) ◽  
pp. 97-102
Author(s):  
Hemmannuella C. Santos ◽  
Emmanuel M. Pereira ◽  
Rafael L. S. de Medeiros ◽  
Paulo M. de A. Costa ◽  
Walter E. Pereira
Keyword(s):  
Vitamin C ◽  
Block Design ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Organic Fertilization ◽  
Randomized Block Design ◽  
Number Of Leaves ◽  
The Mean ◽  
Organic Compost

ABSTRACT Okra, Abelmoschus esculentus (L.) Moench, is a vegetable with annual fruit native to hot regions of Africa, well adapted to the conditions of the Northeast and Southeast regions of Brazil, where it is widely used by small farmers. This study aimed to evaluate the effect of mineral and organic fertilization on the production and quality of okra fruits. The experiment was conducted in randomized block design, with three replicates and eleven treatments defined according to a Baconian matrix. Treatments consisted of doses of N (0, 100, 200 and 300 kg ha-1), P (0, 100, 200 and 300 kg ha-1) and K (0, 80, 160 and 240 kg ha-1), as well as absence and presence of organic compost (30 t ha-1). The following parameters were evaluated: plant height, stem diameter, number of leaves, production of fruits plant-1, number of fruits plant-1, fruit length and diameter and fruit quality (pH, soluble solids, titratable acidity, vitamin C and electrical conductivity). The crop is demanding in terms of K and N fertilizations, with increments of 15.8 and 36% in the mean number and diameter of fruits, respectively. Organic fertilization did not influence the vegetative growth of okra, but was beneficial to the production of fruits with higher vitamin C content, 52% higher than the contents found in fruits produced without such input.

scholarly journals Effects of Fertilization, Arbuscular Mycorrhiza, and Salinity on Growth, Yield, and Bioactive Compounds of Two Aloe Species

HortScience ◽  
2013 ◽  
Vol 48 (5) ◽  
pp. 568-575 ◽  
Author(s):  
Mariateresa Cardarelli ◽  
Youssef Rouphael ◽  
Elvira Rea ◽  
Luigi Lucini ◽  
Marco Pellizzoni ◽  
...  
Keyword(s):  
Plant Growth ◽  
Arbuscular Mycorrhiza ◽  
Bioactive Compounds ◽  
Cultural Practices ◽  
Growth Parameters ◽  
Saline Water ◽  
Growth Yield ◽  
Am Fungi ◽  
Organic Fertilization ◽  
Aloe Barbadensis

Three greenhouse experiments were carried out to compare the responses of Aloe arborescens and Aloe barbadensis with organic fertilization (standard or reduced fertilization level), arbuscular mycorrhiza [with AM (+AM) or without AM (–AM)], and salinity (1 or 80 mm NaCl) in terms of plant growth, leaf yield, mineral composition, and nutraceutical value. In all experiments, the yield of fresh leaves was significantly higher by 320%, 252%, and 72%, respectively, in A. barbadensis in comparison with A. arborescens. Doubling the fertilizer dose, plant growth parameters increased, but the bioactive compounds were negatively affected. The highest antioxidant activity was recorded with A. barbadensis using both fertilization regimes, whereas the highest values of anthraquinones aloin were observed in A. barbadensis using a reduced fertilization regime and when plants were inoculated with AM fungi. β-polysaccharide concentration was significantly higher in A. barbadensis in comparison with A. arborescens and was increased by 33% when plants were inoculated with AM fungi. In both Aloe species, increasing the salinity decreased the leaf fresh weight and total dry biomass but increased the aloin and β-polysaccharides content by 66% and 21%, respectively. The results suggest that cultural practices such as organic fertilization, inoculation with AM fungi, and irrigation with saline water can represent effective tools to achieve a more favorable phytochemical profile.

scholarly journals Farklı Besin Solüsyonlarının Yüzen Su Kültüründe Rokanın Verim ve Kalite Özelliklerine Etkileri

2019 ◽  
Vol 7 (2) ◽  
pp. 258
Author(s):  
Golgen Bahar Oztekin ◽  
Tuğba Uludağ ◽  
Yüksel Tüzel ◽  
Mahmut Tepecik
Keyword(s):  
Plant Growth ◽  
Vitamin C ◽  
Nutrient Solution ◽  
Growth Yield ◽  
Nitrate Content ◽  
Water Culture ◽  
Full Dose ◽  
Macro Elements ◽  
Yield And Quality ◽  
Half Dose

This study was conducted in styrofoam trays placed on an aerated nutrient solution in vats in order to determine the effect of different nutrient solutions on rocket plant growth, yield and quality. Seeds of Bengi F1 rocket cultivar were sown into peat as inserting each seed to each hole (17 ccs) of trays with 210 cells (957 plant m-2). Following germination in the germination chamber, seedling trays were moved to a climate controlled greenhouse for adaptation. After emergence, the seedlings were transferred to water culture. The nutrient solution was applied as “full dose” (mg/L: N 150, P 50, K 150, Ca 150, Mg 50, Fe 5.0, Mn 0.50, Zn 0.05, B 0.50, Cu 0.03, Mo 0.02), “half dose” (macro elements reduced by 50%) and “without nutrients” (water). Cultivation was performed in 2 consecutive periods and in each period 3 harvests were done and quality analysis was done on the leaves from the first harvest. Results were given as the mean of two periods. Results showed that plant growth, yield and quality parameters vary depending on the concentration of the nutrient solution. It was observed that as the concentration of nutrient solution decreased, plant growth, biomass, yield values decreased, leaf color and total chlorophyll concentration did not change and while nitrate content decreased, vitamin C content increased. Leaf N, P, K and Fe element contents decreased with half dose, whereas Ca and Mg content did not change. However, there was no statistical difference between full dose and half dose treatments in many measured parameters. When all the data obtained from the study are evaluated together; it is suggested that rocket can be grown in a floating water culture and the dose of macro elements as reduced 50% can be preferred because it reduces the nitrate content, increases the vitamin C content and allows the use of less fertilizers without causing any significant reduction in yield compared with full dose.

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