Effects of different nitrogen and potassium sources on lettuce (Lactuca sativa L.) yield in a sandy soil

Awaad, M.; Badr, Ragab Ali; Badr, Mamoduh Ali; Abdel-Rahman, A. H.

doi:10.18393/ejss.2016.4.299-306

Cited by 13 publications

(15 citation statements)

References 11 publications

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“…These results in accordance with the findings of Shaheen et al, (2012);El-Mergawi et al, (2014); Zhang et al, (2014) ;Abdelraouf, (2016); Awaad et al, (2016) and Mahlangu et al, (2016).…”

Section: Discussionsupporting

confidence: 92%

Nitrate Accumulation and Oxalate Formation in Spinach Plants (Spinacia oleracea, L.) as Affected by Nitrogen Fertilization levels and Iron Foliar Application.

Ghaly

Baddour

El-Azazy

2017

Journal of Soil Sciences and Agricultural Engineering

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Two field experiments were organized at the Tag Elez Station Experimental Farm; Governorate of Dakahlya, during the two successive winter seasons of . Spinach seeds were sown on 2 nd and 6 th of December, seasons 2014 and 2015, respectively. Ten treatments were arranged in split plot design with 3 replicates to evaluate the combination effect of five levels of N-fertilizer {50, 75, 100, 125 and 150 %} from the recommended dose (RD) by the Ministry of Agric. and Soil Recl. (MASR) in the form of NH 4 NO 3 (33.5% N) as soil application in the presence and absence of Fe as foliar way FeSo 4 (20%Fe) was used as a source of Fe at the rate of 300 ppm Fe. The obtained results indicated that: * A nitrogen fertilizer application at the rates of this survey significantly increased the average values of dry weigh, chlorophyll contents, N, P, K, Fe and VC in the leaves of spinach plant tell the rate of 100% RD. increasing the rate of N-fertilizer from 100% to 150% RD significantly decreased the mean values of all the aforementioned traits during both seasons of the experimentation. At any level of N-fertilization; foliar applied of Fe has been recorded a pronounced high effects on the average values of all parameters under the current study. * Increasing the rate of N-fertilization from 50 to 150%RD sharply and significantly increased the average value of nitrate and nitrite accumulation in spinach leaves, while such effect significantly decreased the activity of nitrate reductase enzyme in spinach plant. Moreover, foliar application of Fe in combination with any rate of N-fertilizer has been corrected this trend. * A favorable effect on oxalate formation in spinach leaves due to an addition of iron in foliar way combined with any level of N-fertilization as compared to the plants treated with the same levels of nitrogen in single form.

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“…These results in accordance with the findings of Shaheen et al, (2012);El-Mergawi et al, (2014); Zhang et al, (2014) ;Abdelraouf, (2016); Awaad et al, (2016) and Mahlangu et al, (2016).…”

Section: Discussionsupporting

confidence: 92%

Nitrate Accumulation and Oxalate Formation in Spinach Plants (Spinacia oleracea, L.) as Affected by Nitrogen Fertilization levels and Iron Foliar Application.

Ghaly

Baddour

El-Azazy

2017

Journal of Soil Sciences and Agricultural Engineering

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“…For the nitrogen source x nitrogen content interaction, the NitroMais source always corresponded to the highest averages in the characteristics of ALT, DCL and DCA, except only at the concentration of 150 (Table 2). In the work of Awaad et al (2016), the results indicated that the application of slow release nitrogen fertilizer, alone or combined with potassium sulfate, significantly improved the yield and yield quality of lettuce plants cultivated in sandy soil. Quadratic effect was observed in ALT, DCL, DCA, NFC and PFC in the Americana genotype for both nitrogen sources, whereas Crespa genotype showed similar behavior for DCL and DCA in NitroMais and NFC and PFC fertilizer in Polyblen (Figure 1 and Table 3).…”

Section: Resultsmentioning

confidence: 99%

Univariate and multivariate controlled release nitrogen pairing on lettuce culture performance

Ferreira¹,

Bastos²,

Carvalho³

et al. 2020

Commun. Plant Sci.

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There are few studies in the literature that demonstrate the behavior of controlled release nitrogen fertilization in lettuce crop. Thus, the objective of this work was to evaluate, through univariate and multivariate pairing, the behavior of controlled release nitrogen sources on the performance of lettuce culture. The studies were conducted at the Horta dos Coqueiros property in Mineiros-GO, Brazil. The soil analyzes were taken before the experiment implementation, in the 0 to 20 cm layer, the soil was classified as NEOSSOL Quartzarenic. The experimental design was a randomized complete block design, with a 2x2x5 factorial design corresponding to 2 lettuce genotypes (Americana cv. Lucy Brow and Crespa cv. Vanda), submitted to two controlled release N sources (NitroMais and Polyblen). doses (0, 75, 150, 225, 300 kg ha-1 of N) performing 4 repetitions. Transplantation occurred 20 days after sowing in trays, with plant spacing of 30x30. Data collection occurred 45 days after transplantation used 5 central plants of each plot. The analyzes were performed in the Rbio R interface, besides the Genes Software. The analysis of variance revealed triple interaction among the variables. Quadratic effect was expressed for both genotypes on protected nitrogen sources. For high performance of lettuce cultura in the Americana genotype cv. Lucy Brown recommends the application of protected nitrogen Polyblen at a concentration of 217.50 and NitroMais at 174.38 kg ha-1 of N, as well as the source Polyblen at a dose of 146.50 kg ha-1 of N in the genotype Crespa cv. Vanda. Highlighted Conclusions 1. High performance of lettuce crop in the genotype Americana cv. Lucy Brown recommends the application of controlled release nitrogen Polyblen at a concentration of 217.50 and NitroMais at 174.38 kg ha-1 of N. 2. In the Crespa cv. Vanda, the Polyblen source is at a dose of 146.50 kg ha-1 of N.

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“…Application of different sources of N with combination of potassium sulphate increased the EC of the soil above that of soil fertilized with slow release N fertilizer alone. Application of N and potassium sulphate together decreased the pH and the amounts of N and P in the soil, but increased the quantity of potassium, (Awaad et al, 2016).…”

Section: Fig 2 Effects Of Nitrogen Fertilization On Availablementioning

confidence: 92%

Effect of Nitrogen Fertilization on Growth, Yield and Fruit Quality of Superior Grapevines

الراضی¹,

حجاب²,

عبدالعال³

et al. 2019

Journal of Soil Sciences and Agricultural Engineering

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This study was conducted during 2017 and 2018 seasons on 5-year old Superior grapevines in a farm located at Minia-Abokerkas western desert road, Egypt. The aim of this investigation was to study the effect of nitrogen sources: (Calcium nitrate15.5% N as a fast fertilizer and urea form 40% N as a slow fertilizer), with two nitrogen rates (40 and 70 N units) on the growth and yield of Superior grapevines. The results showed that, the leaf N content was significantly affected by nitrogen applications. The highest value of leaf N content was 2.68-8.83% with 70 units calcium nitrate (F-70) treatment after both seasons. Leaf P content ranged from 0.11 to 0.41% in both seasons. Leaf K content was un-significantly affected by either the tested N sources or their rates, comparing to control (C) treatment. Leaf K content ranged from 0.79 to 1.41 and 0.69 to 2.00 % in 2017 and 2018 seasons, respectively. Leaf area was significantly affected by fertilizer types or rates. The leaf area (average value) could be arranged in descending order F-70 > F-40 > S-40 > S-70 in both seasons, the highest yield was recorded under urea form 40 units (S-40) and (S-70) treatments. The highest values of total soluble solids, TSS/acid ratio, total sugars, reducing sugars and the lowest values of total acidity were obtained with (S-70) treatment in the second season. Soil nitrogen content, available potassium and available phosphorus was significantly increased by the tested sources rates of fertilizers after the second season compared to the first season. The utilizing of N fertilizers either as urea form or calcium nitrate elevated the amount of N, P and K in the soil compared to control.

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Effects of different nitrogen and potassium sources on lettuce (Lactuca sativa L.) yield in a sandy soil

Cited by 13 publications

References 11 publications

Nitrate Accumulation and Oxalate Formation in Spinach Plants (Spinacia oleracea, L.) as Affected by Nitrogen Fertilization levels and Iron Foliar Application.

Nitrate Accumulation and Oxalate Formation in Spinach Plants (Spinacia oleracea, L.) as Affected by Nitrogen Fertilization levels and Iron Foliar Application.

Univariate and multivariate controlled release nitrogen pairing on lettuce culture performance

Effect of Nitrogen Fertilization on Growth, Yield and Fruit Quality of Superior Grapevines

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