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 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 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 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 Effect of Light-Emitting Diodes (LEDs) on Some Physical and Bioactive Compounds of ‘Iceberg’ Lettuce (Lactuca Sativa L.)

2021 ◽  
Vol 4 (1) ◽  
pp. 21-30
Author(s):  
Asmaa Sayed Ahmed ◽  
Arshad Abdulkhalq Yaseen ◽  
Triska Dlshad Bakr
Keyword(s):  
Chlorophyll Content ◽  
Lactuca Sativa ◽  
Light Emitting Diodes ◽  
Quality Parameters ◽  
The Other ◽  
Carotenoid Content ◽  
Nitrate Content ◽  
Light Emitting ◽  
Iceberg Lettuce ◽  
Led Lights

Abstract The use of light-emitting diodes (LEDs) is a recent concerned application in the indoor crop system of the modern plant production. In our research, we evaluated the influence of four monochromic LED lights including 100% White (W), Yellow (Y), Red (R) and Blue (B) in comparison to solar lightening condition (GR) as a control. In this regard, some morphological characteristics and biochemical content of the common outdoor ‘Iceberg’ lettuce (Lactuca sativa L.) was measured. The results show that leaf length, leaf area and total head weight were significantly greater in the plants grown under B LED, while all the other physical parameters were significantly higher in the plants grown under GR environmental conditions. On the other hand, chlorophyll (Chl), carotenoids (Car), and nitrate content were also influenced by different light treatments. Plants grown under LED light treatment resulted in significantly higher chlorophyll content compared to the control. However, significantly greater carotenoid content was in the plants grown under GR condition. The highest total chlorophyll content was recorded under B and R LED, whereas the lowest was in the GR condition. The lowest nitrate content in the blade and petiole was recorded in the plants grown under Y LED, while the highest nitrate content was recorded in the GR. Based on our result, it is possible to grow and improve some quality parameters of common outdoor ‘iceberg’ lettuce under LED where the solar light is limited or unavailable. Thus, plants performed better under GR light conditions than monochromic LEDs; however, some LED lights could improve some quality parameters and biochemical contents in the ‘iceberg’ lettuce variety.

scholarly journals Hayvan Yemi Olarak Kullanılan Şekerpancarı Yapraklarının Nitrat İçeriğine Azot-Bor Uygulamasının ve Zamanın Etkisi

2021 ◽  
Vol 9 (2) ◽  
pp. 395-400
Author(s):  
Bedriye Bilir ◽  
Kadir Saltalı
Keyword(s):  
Sugar Beet ◽  
Animal Feed ◽  
Quality Parameters ◽  
Nitrate Content ◽  
Negative Effects ◽  
Nitrate Accumulation ◽  
Factorial Trial ◽  
N Dose ◽  
Set Up ◽  
Different Doses

Nitrogen (N) and boron (B) fertilization is important for yield and quality in sugar beet cultivation. However, excess nitrogen (N) fertilizers cause negative effects on quality. The increase in nitrate content in sugar beet leaves used as animal feed is one of the quality parameters negatively affected. The aim of this study is to examine the effect of different doses of nitrogen, boron fertilization and time on nitrate accumulation in sugar beet leaves. The study was carried out on a field with a B content of 0.56 mg kg-1 in Elbistan district of Kahramanmaraş province. Experiment random blocks were set up in 3 replications according to factorial trial design. Five different doses of N (0, 9, 18, 27 and 36 kg N da-1) and 4 different doses of B (0, 200, 400, 600 g B da-1) were used in the experiment. Leaf samples were taken in July, August, September and October. According to the results of the research, as the applied N dose increased, the nitrate content of sugar beet leaves increased at statistically significant level. The effect of boron application on nitrate of leaves was not found to be significant. The decrease in nitrate content of sugar beet leaves towards the harvest period was found to be statistically significant. As a result, using sugar beet leaves as animal feed after harvest does not pose a risk to animals in terms of nitrate.

scholarly journals Cowpea Crop Response to Mineral and Organic Fertilization in SE Spain

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 822
Author(s):  
Virginia Sánchez-Navarro ◽  
Raúl Zornoza ◽  
Ángel Faz ◽  
Juan Antonio Fernández
Keyword(s):  
Soil Fertility ◽  
Crop Yield ◽  
Total Nitrogen ◽  
Nutritional Composition ◽  
The Other ◽  
Organic Fertilizers ◽  
Nitrate Content ◽  
Organic Fertilization ◽  
Yield And Quality ◽  
Other Hand

Mineral fertilization is considered to be useful for improving soil fertility and yields. However, its use is linked to global warming and soil and water pollution by its rapid mobilization. On the other hand, organic fertilization is recommended to maintain or improve soil organic carbon and total nitrogen stocks while contributing to climate change mitigation. The main goal of this study was to assess the effect of two different fertilizer types, mineral and organic, during three cowpea crop cycles on the soil’s physicochemical properties, enzyme activities, crop yield, crop quality and nutritional composition when considering two cowpea cultivars (Feijão frade de fio preto (FP) and Feijão frade de fio claro (FC)). The use of mineral fertilizers was seen to contribute to improved soil fertility due to the increase in soil properties, such as recalcitrant carbon, total nitrogen, ammonium content, available K and available Mg. On the other hand, organic fertilizers only increased the nitrate content in the soil. There were no differences in terms of cowpea crop yield, quality and nutritional composition by fertilizer type. Thus, both fertilizer types contributed to the same crop yield and quality, and thus the use of organic fertilizers can result in a sustainable alternative for maintaining cowpea crop yield and quality.

scholarly journals Effect of mineral fertilizers with different sulphur content on the yield of winter wheat in a small plot experiment

2009 ◽  
pp. 97-100
Author(s):  
Éva Mars ◽  
Péter Sipos ◽  
Norbert Boros ◽  
Zsuzsanna Tarján ◽  
Zoltán Győri
Keyword(s):  
Winter Wheat ◽  
Maximum Yield ◽  
Mineral Fertilizer ◽  
Quality Parameters ◽  
Mineral Fertilizers ◽  
Yield And Quality ◽  
Important Field ◽  
Small Plot ◽  
The University ◽  
Plot Experiment

We can find more and more references on the importance of sulphur and sulphur fertilization, mainly in the case of most important field crops, as cereals, maize, and the oilseeds. The traditional sulphur sources continuously lost their importance by the stringent air pollution orders and nowadays they are not able to meet the demands of plants. Besides, the application of superphosphate, as phosphorus mineral fertilizer, decreased in several countries. Sulphur fertilization is required in most cases to reach the required yields and quality parameters. The lack ofsulphur causes decreased nitrogen utilization and yield by cereals as winter wheat, moreover, results less favourable baking parameters.We have examined the N and S content of different parts of winter wheat plants in a small plot experiment at the University of Debrecen, Centre of Agricultural Sciences, Látókép Experimental Station. We have also studied the effect of different sulphur fertilization forms and doses on the baking quality parameters and yield. Our aim was to contribute to the development of yield and quality improving sulphur fertilization methods, adaptable by practice.We have measured the lowest yield in the case of one of the control plots, and 100 kg/ha nitrogen, 80 kg/ha potassium and 70 kg/ha phosphorus nutrient supply resulted the lowest yield (8.7 kg/plot). The maximum yield, 10.2 kg/plot was also experienced on superphosphate fertilized plot by the application of 140 kg/ha phosphorus dose. Application the first dose of both Biofert and FitoHorm 32 S leaf fertilizers raised the yield from9.1 to 9.9 kg/plot. ANOVA proved that Biofert and FitoHorm 32 S had no significant effect on the amount of yield, the increase is only a tendency.

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.

From Scarcity to Abundance: Achieving Quality-Assured Mass Higher Education

2011 ◽  
Vol 15 (2) ◽  
Author(s):  
Peter P. Smith
Keyword(s):  
Higher Education ◽  
Knowledge Economy ◽  
Good Practice ◽  
The United States ◽  
The Other ◽  
Secondary System ◽  
Mass Higher Education ◽  
Post Secondary ◽  
One Year ◽  
The One

The United States is in a bind. On the one hand, we need millions of additional citizens with at least one year of successful post-secondary experience to adapt to the knowledge economy. Both the Gates and Lumina Foundations, and our President, have championed this goal in different ways. On the other hand, we have a post-secondary system that is trapped between rising costs and stagnant effectiveness, seemingly unable to respond effectively to this challenge. This paper analyzes several aspects of this problem, describes changes in the society that create the basis for solutions, and offers several examples from Kaplan University of emerging practice that suggests what good practice might look like in a world where quality-assured mass higher education is the norm.

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