Оптимальные условия хранения семян овощных культур: температура от -10° С до + 12° С и относительная влажность воздуха, в зависимости от культуры, от 40% до 60%. При более низкой температуре у многих семян снижаются энергия прорастания и всхожесть. В очень морозную зиму семена могут пострадать.
Увеличивая или сокращая световой день, можно регулировать сроки цветения овощных культур и в результате получать урожай хорошего качества. Например, специально организованный короткий день помогает в борьбе с такими нежелательными явлениями, как стрелкование и цветение редиса, салата, шпината (растения длинного дня). Для этого на грядки с 8 часов вечера до 7-8 часов утра устанавливают съемные каркасы из непрозрачных материалов.
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