Yield and quality of lettuce (Lactuca sativa L.) depending on variety and type of nitrogen fertilizer

IF 0.7 4区 农林科学 Q3 AGRONOMY Emirates Journal of Food and Agriculture Pub Date : 2023-06-01 DOI:10.9755/ejfa.2023.3128
L. Bošković-Rakočević, N. Pavlović, J. Mladenović, Miloš Marjanović, J. Zdravković, Ivana Tošić
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Abstract

The aim of this research was to determine the effect of the application of different types of nitrogen fertilizer in five different varieties of lettuce on yield. The experiment was performed in the open field, in the spring cycle of growing during 2018 and 2019. The size of the base plot was 3 m2, and the trial was set up in a random block system. The trial covered the application of various forms of nitrogen fertilizers: ammonium sulphate, ammonium nitrate and urea. The applied nitrogen dose is 100 kg/ha (May 10th 2018 and May 8th 2019). Samples for the analysis of vitamin C and nitrate content, as well as yield determination, were carried out at the stage of the technological maturity of lettuce (60-62 days after seedling). The average weight of lettuce, depending on the variety, varied in the range of 211.3 g to 258.7 g. The use of ammonium nitrate resulted in the highest average weight of lettuce head (246.7 g), followed by the use of urea (238.9 g) and the lowest by the use of ammonium sulphate (221.0 g). The nutritional value of lettuce (vitamin C content) shows that depending on the applied form of nitrogen in the fertilizer, the highest content of vitamin C was determined by urea (10.86 mg/100 g), then ammonium sulphate (9.61 mg/100 g), and the lowest by ammonium nitrate (7.38mg/100g). The lower content of vitamin C was found in varieties of lettuce with red leaves compared to varieties with green leaves. The accumulation of nitrate in lettuce leaves directly depends on the variety and the applied fertilizer. The highest nitrate content was with ammonium nitrate (2355.6 mg/kg). The accumulation of nitrate in lettuce varieties with red leaves was higher compared to varieties with green leaves. Keywords: Lettuce, Nitrate, Vitamin C, Yield, Open field
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莴苣(Lactuca sativa L.)的产量和质量取决于品种和氮肥类型
本研究旨在确定五个不同品种的莴苣施用不同类型氮肥对产量的影响。试验在露地进行,时间为 2018 年和 2019 年春季生长周期。小区面积为 3 平方米,试验采用随机小区制。试验涉及各种氮肥的施用:硫酸铵、硝酸铵和尿素。施氮剂量为 100 公斤/公顷(2018 年 5 月 10 日和 2019 年 5 月 8 日)。在莴苣技术成熟期(出苗后 60-62 天)取样进行维生素 C 和硝酸盐含量分析以及产量测定。根据品种的不同,莴苣的平均重量在 211.3 克到 258.7 克之间。使用硝酸铵的生菜平均重量最高(246.7 克),其次是使用尿素(238.9 克),使用硫酸铵的生菜平均重量最低(221.0 克)。莴苣的营养价值(维生素 C 含量)显示,根据肥料中氮的施用形式,维生素 C 含量最高的是尿素(10.86 毫克/100 克),其次是硫酸铵(9.61 毫克/100 克),最低的是硝酸铵(7.38 毫克/100 克)。与绿叶品种相比,红叶品种莴苣的维生素 C 含量较低。莴苣叶片中硝酸盐的积累直接取决于品种和施用的肥料。硝酸铵的硝酸盐含量最高(2355.6 毫克/千克)。与绿叶品种相比,红叶莴苣的硝酸盐积累量更高。关键词生菜 硝酸盐 维生素 C 产量 露天种植
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来源期刊
Emirates Journal of Food and Agriculture
Emirates Journal of Food and Agriculture AGRONOMYFOOD SCIENCE & TECHNOLOGY&nb-FOOD SCIENCE & TECHNOLOGY
CiteScore
1.80
自引率
0.00%
发文量
18
期刊介绍: The "Emirates Journal of Food and Agriculture [EJFA]" is a unique, peer-reviewed Journal of Food and Agriculture publishing basic and applied research articles in the field of agricultural and food sciences by the College of Food and Agriculture, United Arab Emirates University, United Arab Emirates.
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