scholarly journals Comparison of the effectiveness of digestate and mineral fertilisers on yields and quality of kohlrabi (Brassica oleracea, L.)

2011 ◽  
Vol 59 (3) ◽  
pp. 117-122 ◽  
Author(s):  
Tomáš Lošák ◽  
Andrea Zatloukalová ◽  
Monika Szostková ◽  
Jaroslav Hlušek ◽  
Jiří Fryč ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Ascorbic Acid Content ◽  
Quality Parameters ◽  
Nitrate Content ◽  
Fresh Matter ◽  
Urea Treatment ◽  
Yield And Quality ◽  
Triple Super Phosphate ◽  
One Year

In a one-year vegetation pot experiment we compared the effect of the digestate from a biogas station and mineral fertilisers on yield and quality parameters of kohlrabi, variety Seguza. Four treatments were used in the trial: 1) untreated control, 2) urea, 3) digestate, 4) urea, triple super phosphate, KCl, MgSO4. The rate of N was the same in treatments 2–4, 1.5 g N/pot. In treatment 4 the rate of P, K and Mg corresponded with the rate of these nutrients in the digestate treatment (3). The weight of single bulbs of the control unfertilised treatment were significantly the lowest (22.9%), as well as the nitrate (6.0%) and ascorbic acid content (66.2%) compared to the urea treatment (100%) and the other fertilised treatments. After the application of the digestate (treatment 3) and mineral fertilisers (treatment 4) the weight of single bulbs significantly increased by 27.9 and 29.2%, respectively, compared to the urea treatment (2). The content of ascorbic acid in the fertilised treatments did not differ (772–789 mg/kg) but it increased significantly compared to the unfertilised treatment (511 mg/kg). There were no significant differences between the two treatments fertilised with mineral fertilisers in the bulb nitrate content (678 and 641 mg NO3−/kg fresh matter, respectively). After digestate application their contents decreased significantly to 228 mg NO3−/kg fresh matter. Digestate treatment resulted in comparable or better yield and qualitative parameters compared to treatment with mineral fertilisers.

scholarly journals The Influence of Digestate and Mineral Fertilisers on Yields and Content of Nitrates and Ascorbic Acid in Kohlrabi Bulbs

2014 ◽  
Vol 62 (1) ◽  
pp. 161-166 ◽  
Author(s):  
Tomáš Lošák ◽  
Tereza Zlámalová ◽  
Monika Vítězová ◽  
Jaroslav Hlušek ◽  
Petr Škarpa ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Quality Parameters ◽  
The Other ◽  
Control Treatment ◽  
Nitrate Content ◽  
Fresh Matter ◽  
Urea Treatment ◽  
Yield And Quality ◽  
One Year ◽  
Small Content

In a one-year vegetation pot experiment we compared the effect of the digestate from a biogas plant and mineral fertilisers on yield and quality parameters of kohlrabi, variety Moravia. Four treatments were used in the trial: 1) untreated control, 2) urea, 3) digestate, 4) urea, triple super phosphate, KCl, MgSO4. The rate of N was the same in treatments 2–4, i.e. 1.5 g N/pot. In treatment 4 the rate of P, K and Mg corresponded with the rate of these nutrients in the digestate treatment (3). The inhibited growth of kohlrabi after the application of NPKMg (4) was obviously the consequence of early planting after the application of fertilisers (5 days) and of the salinity of the small content of soil in the pot and resulted in the lowest weight of single bulbs (69 g), followed by the unfertilised control treatment (75 g). After the application of the digestate (treatment 3) the weight of single bulbs significantly increased (126 g) compared to the urea treatment (101 g) and all the other treatments. The content of ascorbic acid in the fertilised treatments did not differ (441–458 mg/kg) but it increased significantly compared to the unfertilised treatment (398 mg/kg). There were significant differences among all the fertilised treatments (1–2–3–4) in the bulb nitrate content (346–1,147–815–1,091 mg NO3−/kg fresh matter, respectively). After digestate application their content decreased significantly to 815 mg NO3−/kg fresh matter. Digestate treatment resulted in comparable or better yields and qualitative parameters compared to all the other treatments.

scholarly journals Digestate is equal or a better alternative to mineral fertilization of kohlrabi

2012 ◽  
Vol 60 (1) ◽  
pp. 91-96 ◽  
Author(s):  
Tomáš Lošák ◽  
Ludmila Musilová ◽  
Andrea Zatloukalová ◽  
Monika Szostková ◽  
Jaroslav Hlušek ◽  
...  
Keyword(s):  
Quality Parameters ◽  
Nitrate Content ◽  
Mineral Fertilizers ◽  
Mineral Fertilization ◽  
Fresh Matter ◽  
Urea Treatment ◽  
Yield And Quality ◽  
Triple Super Phosphate ◽  
N Dose ◽  
One Year

In a one-year vegetation pot experiment, we compared the effect of digestate from a biogas station and mineral fertilisers on yield and quality parameters of kohlrabi, variety Segura F1. Four treatments were used in the trial: 1) untreated control, 2) urea, 3) digestate, 4) urea, triple super phosphate, KCl, MgSO4. The N dose was the same in treatments 2–4, 1.5 g N/pot. In treatment 4 the P, K and Mg doses corresponded to those supplied in the digestate treatment (3). The weight of single kohlrabi bulbs in the unfertilised control was significantly lower (36.2%) than in the urea treatment (100%) and the other fertilised treatments. After application of digestate (treatment 3) and mineral fertilisers (treatment 4), the weight of single bulbs significantly increased by 36.2 and 33.6%, respectively, compared with the urea treatment (2). The content of ascorbic acid did not differ between the fertilised treatments (282–301 mg/kg), but was significantly lower than in the unfertilised control (334 mg/kg). There were significant differences between all fertilised treatments (2, 3, 4) in bulb nitrate content (745, 187, 462 mg NO3−/kg fresh matter, respectively). After digestate application the content decreased significantly, to 187 mg NO3−/kg fresh matter. The soil Nmin content after harvest varied between 4.19–5.79 mg/kg in all fertilised treatments and the N-NH4+ form prevailed over N-NO3− only in the digestate treatment (3.45/2.34 mg/kg). We recommend the use of digestate to kohlrabi as it results in comparable or better yield and qualitative parameters of kohlrabi compared with mineral fertilizers.

scholarly journals What is More Suitable for Kohlrabi Fertilization – Digestate or Mineral Fertilizers

2015 ◽  
Vol 63 (3) ◽  
pp. 787-791
Author(s):  
Tomáš Lošák ◽  
Jaroslav Hlušek ◽  
Hana Bělíková ◽  
Monika Vítězová ◽  
Tomáš Vítěz ◽  
...  
Keyword(s):  
Quality Parameters ◽  
The Other ◽  
Nitrate Content ◽  
Mineral Fertilizers ◽  
Triple Superphosphate ◽  
Fresh Matter ◽  
Urea Treatment ◽  
Yield And Quality ◽  
N Dose ◽  
One Year

In a one-year vegetation pot experiment, we compared the effect of digestate from a biogas station and mineral fertilisers on yield and quality parameters of kohlrabi, variety Moravia. Four treatments were used in the trial: 1) untreated control, 2) urea, 3) digestate, 4) urea, triple superphosphate, KCl, MgSO4. The N dose was the same in treatments 2–4, 1.5 g N/pot. In treatment 4 the P, K and Mg doses corresponded to those supplied in the digestate treatment (3). The weight of single kohlrabi bulbs in the unfertilised control was significantly lower (39.2%) than in the urea treatment (100%) and the other fertilised treatments. After application of digestate (treatment 3) and mineral fertilisers (treatment 4), the weight of single bulbs significantly increased by 18.6 and 25.2%, respectively, compared with the urea treatment (2). The content of ascorbic acid did not differ among the all four treatments (274–291 mg/kg). There were significant differences between all fertilised treatments (2, 3, 4) in bulb nitrate content (792, 327, 776 mg NO3−/kg fresh matter, respectively). The content of nitrates was the lowest in the unfertilised treatment – 135 mg NO3−/kg fresh matter. After digestate application the nitrate content decreased significantly, to 327 mg NO3−/kg fresh matter. We recommend the use of digestate to kohlrabi as it results in comparable or better yield and qualitative parameters of kohlrabi compared with mineral fertilizers.

scholarly journals Yield and quality of head lettuce after 24-epibrassinolide application under optimal and reduced irrigation

2012 ◽  
Vol 60 (3) ◽  
pp. 93-100 ◽  
Author(s):  
Martin Koudela ◽  
František Hnilička ◽  
Jaroslava Martinková ◽  
Lenka Svozilová ◽  
Jitka Doležalová
Keyword(s):  
Ascorbic Acid ◽  
Acid Content ◽  
Ascorbic Acid Content ◽  
Nitrate Content ◽  
Research Station ◽  
Marketable Yield ◽  
Yield And Quality ◽  
Head Weight ◽  
Moisture Conditions

The aim of this work was evaluation of 24-epibrassinolide influence on yield and quality of head lettuce in optimal and reduced moisture conditions and work out recommendation of 24-brassinosteroids use for lettuce in growers praxis. Field trials were carried out on land belonging to the Demonstration and Research Station of CULS in Prague – Troja in 2009 and 2011. Planting on 27. 8. 2009 and 20. 8. 2011 was done at planting space 0.25 × 0.30 m, each variant in four repetition (single plot 4,5 m2). Seedlings of head lettuce (cultivar Santoro – Rijk Zwaan) were used. Irrigation was carried out by microspraying, and was based on current values of efficient water capacity (EWC); the critical value of the EWC was 80% for optimally irrigated fields (irrigation O), and 50% for variants with reduced levels of irrigation (irrigation S). The total amount of irrigation water during vegetation were as follows: the variant with optimal levels of irrigation (O) had 131 mm in 2009 and 123 mm in 2011; the variant with reduced levels of irrigation (S): 58 mm in 2009 and 63 mm in 2011 Three variants were in both (O and S) conditions: A – no application of 24-epibrassinolide, B – 1 × 24-epibrassinolide application immediately after planting, and C – application of 24-epibrassinolide 2 x (immediately after planting and then after 14 days after 1st application). Concentration of 24-epibrassinolide was 10−6. Following parameters of head lettuce were set after harvesting (10.–12. 10. 2009 and 14.–15. 10. 2011): weight of single heads, marketable heads, marketable yield (in pcs/ha and t/ha) and ascorbic acid and nitrate contents. Influence of 24-epibrassinolide on single lettuce head weight was not significant, decrease of head weight was evident after 24-epibrassinolide application in some variants. Significant increase of marketable heads number and their percentages were noted after 24-epibrassinolide application in optimal moisture conditions – in variant B of 12 261 heads/ha (11.1 %) and in variant C of 16 279 heads/ha (14.7 %) compared with non treated variant A. This trend was not visible in reduced moisture conditions. Increase (nonsignificant) of total marketable yield (in t/ha) was noted after 24-epibrassinolide application. No significant differences were founded among the ascorbic acid contents in each irrigation variant. A higher ascorbic acid content (by approximately 11.9 % in variant C compared with control A) is evident after application of 24-epibrassinolide in the variant with lower levels of irrigation – S. Contrarily, decrease ascorbic acid content is indicated in the optimal levels of irrigation – O (by approximately 16.8 % in variant C compared with control A). The influence of 24-epibrassinolide application on the nitrate content was not significant, but the trend of nitrates decrease in optimal irrigation conditions is evident.

scholarly journals Optical Characteristics of Greenhouse Plastic Films Affect Yield and Some Quality Traits of Spinach (Spinacia oleracea L.) Subjected to Different Nitrogen Doses

Horticulturae ◽  
2021 ◽  
Vol 7 (7) ◽  
pp. 200
Author(s):  
Ida Di Mola ◽  
Lucia Ottaiano ◽  
Eugenio Cozzolino ◽  
Leo Sabatino ◽  
Maria Isabella Sifola ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Spinacia Oleracea ◽  
Growth Yield ◽  
Ascorbic Acid Content ◽  
Leafy Vegetables ◽  
Nitrate Content ◽  
Diffuse Light ◽  
Yield And Quality ◽  
N Dose

Light and nitrogen strongly affect the growth, yield, and quality of food crops, with greater importance in green leafy vegetables for their tendency to accumulate nitrate in leaves. The purpose of this research was to explore the effect of two greenhouse films (Film A and B) on yield, and quality of spinach grown under different nitrogen regimes (not fertilized—N0%; sub-optimal N dose—N50%; optimal N dose—N100%). Film A and Film B were used as clear and diffused light films, with 75% and 87% thermicity, and 85% and 90% total transmittivity, respectively, where only Film B had a UV-B window. Film B elicited an increase in yield (22%) and soil–plant analysis development (SPAD) index (4.6%) compared to the clear film, but did not affect chlorophyll a, b, and total chlorophyll content. In addition, the diffuse film significantly decreased ascorbic acid in the crop but had no effect on lipophilic antioxidant activity and phenols content, but decreased ascorbic acid content. Finally, nitrate content was strongly increased both by nitrogen dose (about 50-fold more than N0%) and greenhouse films (about six-fold higher under diffuse light film), but within the legal limit fixed by European Commission. Therefore, irrespective of N levels, the use of diffuse-light film in winter boosts spinach yield without depressing quality.

scholarly journals The yield and quality of broccoli grown under flat covers with soil mulching

2014 ◽  
Vol 60 (No. 5) ◽  
pp. 228-233 ◽  
Author(s):  
E. Kosterna
Keyword(s):  
Ascorbic Acid ◽  
Dry Matter ◽  
Nutritive Value ◽  
Ascorbic Acid Content ◽  
Chemical Components ◽  
Marketable Yield ◽  
Fresh Matter ◽  
Organic Mulch ◽  
Yield And Quality ◽  
Rye Straw

The experiment was carried out between 2010 and 2012. Effect of plants covering and the kind of organic mulch applied to soil mulching on the yield and selected component of nutritive value in Milady F<sub>1</sub> broccoli cultivated for early harvest was investigated. The application of polypropylene fibre contributed to a significant increase in the marketable yield of broccoli on average by 5.25 t/ha, weight of head by 0.10 kg and length of arc by 1.44 cm. Increase of the content of chemical components as a result of plants covering amounted to 1.76% for dry matter,&nbsp;2.50 mg/100 g fresh matter (FM) for ascorbic acid, 0.65% FM for total sugar and 0.15% FM for monosaccharides. All kinds of straw contributed to an increase in the broccoli yield and improvement its parameters. The highest marketable yield and weight of head was obtained in the plots mulched with buckwheat straw. Irrespective of covering, cultivation on the mulch with buckwheat straw contributed to a slight decrease in dry matter, total sugars content, whereas cultivation on the rye straw decreased ascorbic acid content.

scholarly journals The effects of PLA biodegradable and polypropylene nonwoven crop mulches on selected components of tomato grown in the field

2014 ◽  
Vol 26 (2) ◽  
pp. 163-167 ◽  
Author(s):  
Izabela Zawiska ◽  
Piotr Siwek
Keyword(s):  
Ascorbic Acid ◽  
Dry Matter ◽  
Soluble Sugar ◽  
Soluble Sugars ◽  
Growing Season ◽  
Field Studies ◽  
Nitrate Content ◽  
Yield And Quality ◽  
Cotyledon Stage

ABSTRACT The results of two years (2010-2011) of field studies using two types of nonwoven mulches (one biodegradable, polylactic acid PLA 54 g m-2, and traditional polypropylene PP 50 g m-2) on the yield and quality of tomato are presented. Seeds of tomato (‘Mundi’ F1) were sown in a greenhouse, in containers filled with perlite and sand, and then the plants at the cotyledon stage were replanted in multipot trays filled with substrate for vegetable plants. In the last week of May, seedlings were planted on mulches in the field at a spacing of 50 × 100 cm. The mulch was maintained throughout the growing season. A plot that remained unmulched served as the control. Tomatoes were harvested once a week. The fruits were evaluated for L-ascorbic acid, dry matter, soluble sugars and nitrate content. In 2011, the analysis of the plant material showed that the concentration of L-ascorbic acid was about 23% higher in the tomato fruits harvested from plants grown on biodegradable PLA 61 g m-2 mulch in comparison to the control. A similar effect was demonstrated for the soluble sugar concentration in 2011 for both types of nonwovens.

Effect of inorganic fertilizers and bio-fertilizers on growth, yield and quality of tomato (Lycopersicon esculentum Mill.)

2016 ◽  
Vol 1 (01) ◽  
pp. 116-118
Author(s):  
Anant Kumar ◽  
Virendra Pal ◽  
S. P. Singh ◽  
Santosh Verma
Keyword(s):  
Ascorbic Acid ◽  
Lycopersicon Esculentum ◽  
Acid Content ◽  
Growth Yield ◽  
Ascorbic Acid Content ◽  
Summer Season ◽  
Growth And Yield ◽  
Lycopersicon Esculentum Mill ◽  
Yield And Quality

A field experiment was carried out during summer season of 2013 and 2014 to find out the effect of inorganic and bio-fertilizers on the growth, yield and quality of tomato (Lycopersicon esculentum Mill.) cv. Pusa Hybrid -2. The results revealed that plants growth and yield of tomato can be increased with the application of Azospirillum along with recommended dose of NPK (120kg N + 60kg P + 60kg K/ha). The ascorbic acid content of fruits were found maximum with the 80kg N + 40kg P + 60kg K/ha with Azospirillum. The TSS was improved by the application of 80kg N + 40kg P + 60kg K/ha with Phosphobacteria.

scholarly journals Yield and quality of bush processing tomatoes fertilized with dried organic and organomineral fertilizers

2008 ◽  
Vol 56 (2) ◽  
pp. 31-38 ◽  
Author(s):  
Stanislav Boček ◽  
Ivan Malý ◽  
Šárka Patočková
Keyword(s):  
Ascorbic Acid ◽  
Farmyard Manure ◽  
Total Yield ◽  
Ascorbic Acid Content ◽  
Fruit Weight ◽  
Mineral Fertilizers ◽  
Marketable Yield ◽  
Yield And Quality ◽  
Processing Tomatoes

The effect of dried organic and organomineral fertilizers on the yield and quality of the bush processing tomatoes variety ‘Proton’ were explored in 2005–2006. Field experimental plots were established in Žabčice in the Czech Republic. The following variants of fertilizers were included: Agormin T, Agro, Dvorecký agroferm, farmyard manure, mineral fertilizers and unfertilized control. All plots, except the control, were fertilized with mineral fertilizers on the same nutrients level. Total yield, marketable yield, number of fruits and mean fruit weight were assessed. Total solids, carotenoids, ascorbic acid and nitrates (mg.kg−1 of fresh fruit weight) were analysed in fruits. Fertilizers did not significantly influence total yield and marketable yield. The highest yields were found at Agormin T (7.42 kg . m−2 and 6.73 kg . m−2, respectively), the highest mean fruit weight was found at mineral fertilizers (82.9 g) and Agormin T (82.4 g). Fertilizing with Agro resulted in the highest number of fruits (81.0 pieces . m−2). Dvorecký agroferm significantly increased ascorbic acid content in fruits compared to the control. The highest nitrates content was recorded for the control, the lowest for mineral fertilizers. There was not found significant effect of fertilizers on total solids and carotenoids. All tested dried organic or organomineral fertilizers were shown to be efficient alternatives to traditional farmyard manure. Only Agro significantly decreased ascorbic acid content in comparison to farmyard manure.

scholarly journals Effect of white fleece on the selected quality parameters of early potato (Solanum tuberosum L.) tubers

2011 ◽  
Vol 49 (No. 8) ◽  
pp. 370-377 ◽  
Author(s):  
J. Laxhman ◽  
K. Hamouz ◽  
A. Hejtmánek ◽  
J. Dudjak ◽  
M. Orsák ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Solanum Tuberosum L ◽  
Ascorbic Acid Content ◽  
Field Trials ◽  
Quality Parameters ◽  
Cultivated Plants ◽  
Nitrate Content ◽  
Early Potato ◽  
Potato Tubers ◽  
Potato Genotype

The effects were tested of white fleece on the contents of ascorbic acid, nitrates, and polyphenols in 1999 and 2000, and on the carotenoids content in 2000 and 2001 intubers of two early potato varieties (Adora and Impala) in field trials on two cultivation sites (Přerov n/Labem and Prague-Troja). Early irrigated potatoes were cultivated according to the uniform methodology for field trials. Two variants were compared &ndash; cultivated plants covered with white fleece (Pegas-Agro UV 17) and the controls without any covering. The tubers were harvested three times in intervals of 7&ndash;16 days. The results were statistically tested by ANOVA and Tukey&rsquo;s methods. Ascorbic acid content showed a tendency to higher values in the potatoes covered with white fleece as compared with the control samples (average increase by 12.3%). The effect of the fleece was significantly affected by the potato genotype and the year of cultivation (cv. Adora showed a content higher by 12.54% in comparison with the control). The tendency to reduce nitrate levels was observed in potato tubers cultivated under the fleece, especially in the second term of harvest (on average by 14.34%). The decrease between the first and the third term of harvest was apparent. The higher was the maturity of potato tubers, the lower nitrate content was found. Significant differences were found between the varieties (P = 0.0058) and the cultivation sites (P = 0.0399). The effect of white fleece on polyphenol content was not statistically significant. However, the effect of the year of cultivation on the polyphenols content was significant (P = 0.0094). The effect of white fleece on the carotenoids content was not statistically significant but a tendency to lower contents in the variant with white fleece was found (by 7.2%). The sites and the varieties affected the carotenoids contents significantly (P = 0.0028 and P = 0.0417, respectively).

Sign in / Sign up

Export Citation Format

Share Document