The effect of nitrogen fertilizer, herbicides and cultivar on nitrogen components of carrot roots

Chessin, D.A.; Hicks, J. R.

doi:10.1016/0304-4238(87)90033-1

Cited by 3 publications

(4 citation statements)

References 11 publications

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“…A concentration of 2 -3 g nitrate N kg ¼ 1 DM corresponds to 170 -260 mg nitrate kg ¼ 1 fresh weight of carrots with 115 g DM kg ¼ 1 fresh weight. This is very high compared with the concentrations normally found in carrots grown with the application of mineral fertilizer (Chessin & Hicks, 1987;Cserni & Prohászka, 1987;Sørensen, 1993). In contrast, the concentrations of nitrate in carrots grown in 1995 with maximum N-min at 160 kg N ha ¼ 1 were less than 25 mg nitrate kg ¼ 1 fresh weight, which corresponds to very good quality and an excellent raw material for industrial processing of baby foods.…”

Section: Total Nitrogen and Nitrate Nitrogenmentioning

confidence: 52%

“…Nitrate in vegetables is considered unwanted because a high concentration increases the risk for methaemoglobinaemi a among babies and generally is considered to be involved in the formation of carcinogenic nitroso compounds in the processing and consumption of foods (Phillips, 1971;Hofmann, 1995;Derache & Derache, 1997). The concentration of nitrate is relatively low in carrots (Chessin & Hicks, 1987;Wiebe, 1987). Superoptimal nitrogen (N) supply has been shown to cause undesirable high nitrate levels in carrot, whether supplied as mineral fertilizer (Schaller & Schnitzler, 2000) or by mineralization of residues of previous crops (Sørensen, 1993).…”

Section: Introductionmentioning

confidence: 99%

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Nutritionally Important Chemical Constituents and Yield of Carrot ( Daucus carota L.) Roots Grown Organically Using Ten Levels of Green Manure

Kaack¹,

Nielsen²,

Christensen³

et al. 2001

Acta Agriculturae Scandinavica, Section B - Soil & Plant Sc

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Nutritionally important chemical constituents and yield of carrot (Daucus carota L.) roots grown organically using ten levels of green manure. Accepted February 27, 2002. Acta Agric. Scand., Sect. B, Soil and Plant Sci. 51: 125 -136, 2001. © 2002 Taylor & Francis.In a eld experiment carried out over two years (1995, 1996) carrots were grown organically on a sandy loam soil. A broad range of mineral nitrogen (N-min) levels at carrot emergence was obtained by depleting or amending the soil by removing or supplying different amounts of green manure. With N-min values ranging from 22 to 162 kg N ha ¼ 1 at carrot emergence, the N uptake of the carrot crop increased linearly from 70 to 200 kg N ha ¼ 1 . The yield increased with N-min at lower levels of N, but levelled off above 90 -100 kg N ha ¼ 1 . In fresh carrot roots the concentrations of total N, ten individual amino acids, total sum of amino acids, two amides, asparagine and glutamine, and b-carotene increased linearly with the soil concentration of N-min at carrot emergence. Nitrate N increased exponentially with N-min, reaching levels of 340 mg NO 3 kg ¼ 1 fresh weight under some conditions. The concentrations of potassium, calcium, glucose, fructose, sucrose and six individual free amino acids were unaffected by the N-min level. Magnesium was decreased at the lowest deliberately depleted N-min levels, whereas the concentration of dry matter and vitamin C decreased linearly with increasing N-min levels. Signi cantly lower concentrations of dry matter, total N, nitrate N, vitamin C and total sum of free amino acids were found in the warm and sunny year 1995 with the highest yield of carrot roots, whereas the contrary was found for b-carotene.

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Section: Total Nitrogen and Nitrate Nitrogenmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Nutritionally Important Chemical Constituents and Yield of Carrot ( Daucus carota L.) Roots Grown Organically Using Ten Levels of Green Manure

Kaack¹,

Nielsen²,

Christensen³

et al. 2001

Acta Agriculturae Scandinavica, Section B - Soil & Plant Sc

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“…The recorded dependence of the radish yield parameters on the contents N in corresponds with the attainments of Šlosár et al of soluble sugars, of phenolic compounds, of carotenoids). Chessin and Hicks (1987) found out that along with the rising dose of N fertilizers, the content of nitrogen in carrot was increased linearly, but the content of nitrates was not influenced. Kováčik and Ryant (2019) state that in 85% of cases, nitrogen fertilization increases yields and deteriorates the quality of cultivated plants.…”

Section: Resultsmentioning

confidence: 95%

Dependence of Quantitative and Qualitative Parameters of Radish Yield on Contents of Ammonium and Nitrate Nitrogen in Soil Substrate

Kováčik¹,

Wiśniowska-Kielian²,

Smoleń³

et al. 2021

J. Ecol. Eng.

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Plant nutrition is one of the significant factors determining the quantity and quality of crop production. Therefore, the objective of the experiment was to express the dependence numerically (statistically) of the selected yield parameters of radish on the contents of ammonium and nitrate nitrogen occurring in the soil growing medium in different periods of radish vegetation. The experiment was performed in the plastic greenhouse with aeration and irrigation manually operated. It had three variants and was established by the method of random plot arrangement with a threefold repetition of variants. The variants differed in the quantity of vermicompost in the soil growing medium (0%, 10%, 20%). The achieved results indicate that the yield parameters of radish were more dependent on the contents of N-NO 3 than on the contents of N-NH 4 + occurring in the soil substrate. The quantity of N-NO 3 -, occurring in the soil growing medium in the initial period of the growing season, had impact on the quantity of yield. The quantity of N-NO 3 -, present in the soil substrate in the second half of the growing season, had impact mainly on the content of vitamin C and content of nitrates in roots. As the N-NO 3 content of the soil growing medium increased, the content of nitrates was increased and content of vitamin C was decreased. The dependence between the contents of N-NH 4 + in the substrate and root yield was insignificant. The quantity of radish root yield depended predominantly on the contents of N in occurring in the soil growing medium at the beginning of the growing season. On the contrary, the content of nitrates and vitamin C (influencing the yield quality) was dependent mostly on the contents of N in present in the soil substrate in the second half of radish growing season. Along with the increase in the content of N in , the root yield and the content of nitrates in roots also increased, while the content of vitamin C was decreased.

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“…As the weight of plant roots and leaves and the content of chlorophylls depend considerably on the doses of N (Marschner, 2005), and also the chlorophylls content depends significantly on the N application rates and nitrogen content in the plant (Hallik et al, 2009;Gholizadeh et al, 2017), it is evident that the presented dependences (Table 8) affirm the impact of N nutrition on the vegetable quality, which is usually negative. Along with an increase of the N in content in soil, the formation of phytomass and the quantity of nitrates is increased in it, akin to the quantity of vitamin C decreases (Chessin and Hicks, 1987;Lominadze and Nakashidze, 2016).…”

Section: Interdependences Between the Measured Parametersmentioning

confidence: 99%

Parameters of radish phytomass (Raphanus sativus L.) determined by vermicompost and earthworms (Eisenia fetida)

Kováčik

Olšovská

Smoleń

et al. 2021

Folia Horticulturae

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In 2-year outdoor pots experiment, which was realised in the vegetation cage situated in the campus of Slovak University of Agriculture in Nitra, both the impact of different doses of vermicompost (Vc) (0%, 10%, 20%, 25% and 50%) and the number of earthworms (EW) (0, 10 and 20 individuals/pot) in the soil substrate were studied on the quantitative and qualitative parameters of radish yield. The achieved results show that along with the increasing quantity of Vc, the total chlorophyll content also increased proportionally. The content of vitamin C declined and the content of nitrates increased in both the aboveground and underground biomass. The weight of the roots and leaves of radish increased until the content of Vc in the substrate did not exceed 20%. Vermicompost abundance >20% led to the decline of root and leaf biomass formation. The root yield and leaf biomass were higher in the presence of 50% Vc content in the substrate, compared with the control. The EW had mostly a negative impact on radish phytomass formation, particularly both weight and root diameter. The highest percentage of roots weight decline cultivated in the treatment with EW were obtained with the least dose of Vc (10%), thereby the least quantity of fodder for the EW. The impact of EW on the total chlorophyll, vitamin C and nitrates contents in roots and leaves was non-significant. The number of EW did not influence the root diameter and content of vitamin C; however, it affected the root weight.

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The effect of nitrogen fertilizer, herbicides and cultivar on nitrogen components of carrot roots

Cited by 3 publications

References 11 publications

Nutritionally Important Chemical Constituents and Yield of Carrot ( Daucus carota L.) Roots Grown Organically Using Ten Levels of Green Manure

Nutritionally Important Chemical Constituents and Yield of Carrot ( Daucus carota L.) Roots Grown Organically Using Ten Levels of Green Manure

Dependence of Quantitative and Qualitative Parameters of Radish Yield on Contents of Ammonium and Nitrate Nitrogen in Soil Substrate

Parameters of radish phytomass (Raphanus sativus L.) determined by vermicompost and earthworms (Eisenia fetida)

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