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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">ovoshchi</journal-id><journal-title-group><journal-title xml:lang="ru">Овощи России</journal-title><trans-title-group xml:lang="en"><trans-title>Vegetable crops of Russia</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2072-9146</issn><issn pub-type="epub">2618-7132</issn><publisher><publisher-name>Федеральный научный центр овощеводства</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18619/2072-9146-2023-1-44-49</article-id><article-id custom-type="elpub" pub-id-type="custom">ovoshchi-2113</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>САДОВОДСТВО, ОВОЩЕВОДСТВО, ВИНОГРАДАРСТВО И ЛЕКАРСТВЕННЫЕ КУЛЬТУРЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>HORTICULTURE, VEGETABLE PRODUCTION, VITICULTURE AND MEDICINAL CROPS</subject></subj-group></article-categories><title-group><article-title>Влияние азотного стресса на аккумуляцию нитратов и урожайность сортов салата</article-title><trans-title-group xml:lang="en"><trans-title>Influence of nitrogen stress on nitrate accumulation and yield of lettuce varieties</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7429-4046</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Волкова</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Volkova</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Елена Николаевна Волкова – ведущий научный сотрудник, Отдел 210 Светофизиологии растений и биопродуктивности агроэкосистем.</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>About the Author: Elena N. Volkova – Leading Researcher, Department 210 of Plant Light Physiology and Bioproductivity of Agroecosystems.</p><p>St. Petersburg</p></bio><email xlink:type="simple">ele-ven@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГНУ Агрофизический научно-исследовательский институт</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Agrophysical Research Institute</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>15</day><month>02</month><year>2023</year></pub-date><volume>0</volume><issue>1</issue><fpage>44</fpage><lpage>49</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Волкова Е.Н., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Волкова Е.Н.</copyright-holder><copyright-holder xml:lang="en">Volkova E.N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.vegetables.su/jour/article/view/2113">https://www.vegetables.su/jour/article/view/2113</self-uri><abstract><sec><title>Актуальность</title><p>Актуальность. Многие авторы, отмечают существование значительных генотипических отличий в усвоении азота и накопления нитратов салатом, указывают на аддитивно-доминантный характер наследования признака. Целью работы было выполнить оценку реакции салата различных сортотипов на стресс минерального питания, создаваемый на дефицитном по азоту фоне (N0) и при внесении повышенной дозы азота (N200).</p></sec><sec><title>Материал и методы</title><p>Материал и методы. В микрополевом опыте на хорошо окультуренной дерновоподзолистой почве изучали коллекцию сортов салата, относящихся к основным культивируемым сортотипам. Сорта отличались по географическому происхождению, скороспелости и морфологическим признакам.</p></sec><sec><title>Результаты</title><p>Результаты. Различия по урожайности между сортами на фоне N200 составляли 4,5 раз, а на фоне N0 – 5,7 раз. На повышенном фоне азотного питания самый высокий урожай – 2,22-2,64 кг/м2 формировали сорта: All the Year, Quedlinburger Dickkopf, Берлинский желтый, Great lakes. На дефицитном по азоту фоне по урожайности выделились сорта Азарт и Одесский кучерявец, которые лучше других усваивали почвенный азот. Содержание нитратов в растениях салата разных сортов сильнее варьировало при выращивании на фоне N200 и составляло от 10,7 до 13,6 раз, (в среднем за 2 года – в 11,2 раза), на контроле No – 3,3 раза. Выявлены сорта, накапливающие максимум NO3 в условиях избытка азотного питания Невысоким содержанием NO3 отличался салат – Ромэн (Lactuca romana) – 353 мг/кг и White paris cus (198 мг/кг). Периоду максимального увеличения биомассы соответствовало и максимальное снижение NO3 в растениях. Для оценки скорости изменения биомассы и содержания NO3 были рассчитаны уравнения степенной функции. Результаты показывают, что могут существовать некоторые возможности для снижения содержания NO3 в салате за счет выбора сорта или селекции.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Relevance</title><p>Relevance. Many authors note the existence of significant genotypic differences in the assimilation of nitrogen and the accumulation of nitrates by lettuce, point to the additive-dominant nature of the inheritance of the trait. The aim of the work was to evaluate the response of lettuce of various cultivars to mineral nutrition stress created against a nitrogen-deficient background (N0) and with an increased dose of nitrogen (N200).</p></sec><sec><title>Material and Methods</title><p>Material and Methods. In a microfield experiment on well-cultivated soddy-podzolic soil, a collection of lettuce varieties belonging to the main cultivated variety types was studied. The varieties differed in geographical origin, early maturity and morphological characteristics.</p></sec><sec><title>Results</title><p>Results. Differences in yield between varieties against the background of N200 were 4.5 times, and against the background of N0 – 5.7 times. Against an increased background of nitrogen nutrition, the highest yield – 2.22-2.64 kg/m2 was formed by the following varieties: All the Year, Quedlinburger Dickkopf, Berlin Yellow, Great lakes. Against a nitrogen-deficient background, Azart and Odessa Kucheryavets varieties stood out in terms of yield, which absorbed soil nitrogen better than others. The content of nitrates in lettuce plants of different varieties varied more strongly when grown on the background of N200 and ranged from 10.7 to 13.6 times (on average over 2 years – 11,2 times), on the control of N0 – 33 times. Varieties accumulating maximum NO3 under conditions of excess nitrogen nutrition were revealed. Lettuce Romaine (Lactuca romana) – 353 mg/kg and White paris cus (198 mg/kg) had a low content of NO3. The period of the maximum increase in biomass also corresponded to the maximum decrease in NO3 in plants. Power function equations were calculated to estimate the rate of change in biomass and NO3 content. The results indicate that there may be some scope for NO3 reduction in lettuce through cultivar selection or breeding.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>нитраты</kwd><kwd>азотное питание</kwd><kwd>урожайность</kwd><kwd>сортоспецифичность</kwd><kwd>салат</kwd><kwd>степенная функция</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nitrates</kwd><kwd>nitrogen nutrition</kwd><kwd>productivity</kwd><kwd>variety specificity</kwd><kwd>lettuce</kwd><kwd>power function</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Saric M.R. 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