scholarly journals Nutrients content and yield in selected cultivars of leaf lettuce (Lactuca sativa L. var. crispa)

2008 ◽  
Vol 35 (No. 3) ◽  
pp. 99-106 ◽  
Author(s):  
M. Koudela ◽  
K. Petříková
Keyword(s):  
Vitamin C ◽  
Significant Influence ◽  
Lactuca Sativa ◽  
Dry Matter ◽  
Growing Season ◽  
Lactuca Sativa L ◽  
Leaf Lettuce

Five cultivars of leaf lettuce (Lactuca sativa L. var. crispa) – Bergamo, Dubáček, Frisby, Lollo Rossa and Redin – were evaluated in two-year experiments carried out at the Faculty of Horticulture in Lednice (Mendel University of Agriculture and Forestry in Brno). Experiments were conducted in two trial years, 1998 and 1999; the lettuce was cultivated in three seasons: spring, summer and autumn. After the harvest, contents of following nutrients were evaluated: vitamin C, minerals (K, Na, Ca, Mg), fibre, dry matter and nitrates. The weight of leaf rosette was also recorded. The contents of selected substances and weights of leaf rosette were ranged as follows: vitamin C (65 to 302 mg/kg), potassium (2,394 to 6,477 mg/kg), sodium (39 to 223 mg/kg), calcium (200 to 755 mg/kg), magnesium (110 to 413 mg/kg), fibre (4.98 to 12.22 g/kg), dry matter (59 to 140 g/kg), nitrates (293 to 3,817 mg/kg) and the weight of leaf rosette (164 to 502 g). A significant influence of cultivar was found in the case of K, Na, and Ca content, as well as in dry matter and weight of leaf rosette. The growing season affected significantly all the evaluated substances, except for fibre. The year of cultivation affected all the evaluated parameters but Ca. It appears from the results that the contents of monitored substances were significantly influenced by cultivar as well as by growing season and year.

Effect of Water Jet Cutting and Moderate Heat Treatment on Quality of Fresh-Cut Red Oak Leaf Lettuce (Lactuca sativa L. var. crispa)

2014 ◽  
Vol 7 (12) ◽  
pp. 3478-3492 ◽  
Author(s):  
Sabine Wulfkuehler ◽  
Sabrina Stark ◽  
Johann Dietz ◽  
Herbert Schmidt ◽  
Agnes Weiss ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Lactuca Sativa ◽  
Red Oak ◽  
Effect Of Water ◽  
Lactuca Sativa L ◽  
Water Jet Cutting ◽  
Fresh Cut ◽  
Leaf Lettuce ◽  
Oak Leaf Lettuce

scholarly journals Cadmium Toxicity Affects Phytochemicals and Nutrient Elements Composition of Lettuce (Lactuca sativa L.)

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Sani Ahmad Jibril ◽  
Siti Aishah Hassan ◽  
Che Fauziah Ishak ◽  
Puteri Edaroyati Megat Wahab
Keyword(s):  
Vitamin C ◽  
Lactuca Sativa ◽  
Cadmium Toxicity ◽  
Positive Interactions ◽  
Nutrient Elements ◽  
Lactuca Sativa L ◽  
Nutrient Film Technique ◽  
Iron Manganese ◽  
Concentration Levels

Lettuce varieties Bombilasta BBL and Italian 167 were treated with different concentrations of cadmium (0, 3, 6, 9, and 12 mg/L) in a nutrient film technique (NFT) system to study its toxicity on phytochemicals and nutrient elements. Antioxidants analysis which employed DPPH and FRAP, flavonoids, phenolic, vitamin C, malondialdehyde (MDA), and proline indicated significant effects of Cd treatment on the varieties tested. Different concentration levels of Cd lead to positive interactions in FRAP, phenolic, and MDA but no significant effect in flavonoids, vitamin C, and proline. Contents of macro- and microelements in the varieties were significantly affected with increase in the toxicity levels of Cd in all nutrient elements tested with interactions exhibited for iron, manganese, and zinc.

Genetic variation and phylogenetic relationship among different leaf lettuce (Lactuca sativa L.) varieties in Korea

2020 ◽  
Vol 53 (3) ◽  
Author(s):  
Yu-Meng Lu ◽  
Xin-Fu Bai ◽  
Shi-Lin Zheng ◽  
Yong-Chul Park ◽  
Yan-Lin Sun ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Phylogenetic Relationship ◽  
Lactuca Sativa ◽  
Lactuca Sativa L ◽  
Leaf Lettuce

scholarly journals The effect of fertilisation with fermented pig slurry on the quantitative and qualitative parameters of tomatoes (Solanum lycopersicum)

2009 ◽  
Vol 4 (No. 3) ◽  
pp. 116-121 ◽  
Author(s):  
L. Kouřimská ◽  
L. Babička ◽  
K. Václavíková ◽  
D. Miholová ◽  
Z. Pacáková ◽  
...  
Keyword(s):  
Vitamin C ◽  
Significant Influence ◽  
Dry Matter ◽  
Titratable Acidity ◽  
Matter Content ◽  
Dry Matter Content ◽  
Pig Slurry ◽  
Suitable Alternative ◽  
Organic Fertiliser ◽  
C 50

The effect of fertilisation with fermented pig slurry on the quantitative and qualitative parameters of two kinds of tomatoes was assessed by means of pot trials. These trials were carried out between the years 2005 and 2008. Each trial involved four treatments, namely (a) control without fertilisation, (b) fertilisation with mineral fertilisers, (c) 50% nutrients in mineral fertilisers and 50% in fermented pig slurry, and (d) fertilisation with fermented pig slurry only. Besides the yield parameters, the following characteristics were monitored: dry matter content, vitamin C content, titratable acidity, nitrogen compounds, nitrates and selected elements (Pb, Cd, As, Zn and Hg) contents. The fertilisation method showed no statistically significant influence on many parameters (titratable acidity, Hg, As, dry matter, vitamin C and nitrates contents). These results showed that anaerobically fermented pig slurry can be a suitable alternative to the use of mineral fertiliser. They also showed that its use as an organic fertiliser did not impair the hygienic quality and safety of the vegetable products grown, as all tomato samples fulfilled the tested heavy metals and nitrates legislation limits. The fertilisation method showed a statistically significant influence on the yield. Diffe-rences occurred between the organic and mineral methods in the case of Cd, and between non-fertilised and organic methods in the case of Zn. The fertilisation method also significantly influenced N-compounds content in tomatoes. A statistically significant influence of the year was found with all parameters except zinc and vitamin C contents. The influence of cultivar was also found, but only in the case of zinc and dry matter contents.

scholarly journals Yields of perennial grasses in the summer and at the end of the growing season

2009 ◽  
Vol 57 (2) ◽  
pp. 105-114
Author(s):  
Jiří Skládanka ◽  
Petr Doležal ◽  
František Hrabě ◽  
Jan Šeda ◽  
František Mikyska
Keyword(s):  
Significant Influence ◽  
Dry Matter ◽  
Relative Yield ◽  
Dactylis Glomerata ◽  
Growing Season ◽  
Perennial Grasses ◽  
Species Number ◽  
Relative Yield Total ◽  
Additive Relation ◽  
Small Plot

The paper deals with the yields of Festulolium, Dactylis glomerata, Arrhenatherum elatius and Festulolium-Dactylis glomerata mixture during the growing season and at the end of the growing season. The yields were assessed in the Bohemian-Moravian upland at 560 m a.s.l. A small-plot experiment was established in three repetitions. The assessment was made in three subsequent years. The experiment was annually fertilized with 50 kg . ha−1 N, 30 kg . ha−1 P and 60 kg . ha−1 K. Evaluated were dry matter yields and RYT values (Relative Yield Total) in the mixture of Festulolium and Dactylis glomerata. In summer, the sward was used either for one cut (harvest in early June) or two cuts (harvests in early June and late July). At the end of the growing season, the stand was harvested in October or in November or in December. Yields of the first cut in early June ranged from 5.90 to 9.12 t . ha−1. Yields of the second cut in late July ranged from 1.05 to 4.60 t . ha−1. Statistic difference between the species was significant (P < 0.05) in the respective cuts. Total yields of dry matter in the growing season ranged from 7.51 to 10.05 t . ha−1. Number of cuts and year showed a statistically highly significant influence (P < 0.01) on DM yields. The mixture of Festulolium and Dactylis glomerata exhibited an additive relation (RYT = 1) in the first cut and an antagonistic relation (RYT < 1) in the second cut. At the end of the growing season, the yields ranged from 0.71 to 2.27 t . ha−1. Average yields of one-cut swards (harvested in summer in early June) were at the end of the growing season 2.27 t . ha−1 and average yields of two-cut swards (harvested in summer in early June and late July) were 0.79 t . ha−1. From October to December, the yields were decreasing from 1.78 to 1.32 t . ha−1. Species, number of cuts in summer, harvest date at the end of the growing season and year showed a statistically highly significant influence (P < 0.01) on dry matter yields. In the first two production years, the mixture of Festulolium and Dactylis glomerata exhi­bi­ted an antagonistic relation (RYT < 1) at the end of the growing season. In the third production year, the relation between Festulolium and Dactylis glomerata as expressed by the RYT value could be identified as synergic (RYT > 1).

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