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首页> 外文期刊>Journal of Science and Technology of Greenhouse Culture >Effects of salinity stress on some yield parameters and morphological characteristics of spearmint (Mentha spicata L.) in hydroponic conditions
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Effects of salinity stress on some yield parameters and morphological characteristics of spearmint (Mentha spicata L.) in hydroponic conditions

机译：盐分胁迫对水培条件下留兰香（Mentha spicata L.）某些产量参数和形态特征的影响

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摘要

Mint is an important medicinal herb that is cultivated in different parts of the world. In order to investigate the effects of salinity stress on morphological characteristics of spearmint (Mentha spicata L.), an experiment was conducted in 2013, based on complete randomized design, under hydroponic conditions, at Research Greenhouse of Faculty of Agriculture, Ferdowsi University of Mashhad, Iran. Treatments were five salinity levels (0, 30, 60, 90 and 120 mM of sodium chloride) with four replications. Growth medium was 2:1 cocopeat to perlite, and complete nutrients solution was used. Supplying plants’ nutrients was twice a week along the irrigation water application. When plants’ height was 30 cm, salinity treatments were applied and were continued till full flowering. At the end of the experiment, morphologic traits including plant height, number of main stems, number of lateral branches, leaf area, specific leaf weight, stem diameter, number of nodes, fourth internode length, and spike length were measured. Results showed that salinity stress had significant effects on leaf area, fresh and dry weights of leaf, stem and root, plant height, number of lateral branches, number of nodes, fourth internode length, and spike length. The highest leaf area, leaf dry weight, plant height and number of lateral branches were observed in control treatment. The lowest leaf area and leaf dry weight were obtained in salinity level of 120 mM, and the lowest plant height and number of lateral branches were observed in salinity levels of 90 mM and 120 mM. Salinity had no significant effect on fresh weight of shoot to root ratio, fresh weight of leaf to root ratio, specific weight of leaves, number of main stems and stem diameter. According to the results, it appears that spearmint is sensitive to salinity stress and it can't tolerate salinity levels higher than 30 mM sodium chloride.
机译：薄荷是一种重要的草药，在世界各地都有栽培。为了研究盐分胁迫对留兰香（Mentha spicata L.）形态特征的影响，2013年，在完全水培条件下，基于完全随机设计，在马什哈德·费尔多西农业大学农学院研究温室进行了一项实验，伊朗。处理为五种盐度水平（0、30、60、90和120 mM氯化钠），重复四次。生长培养基为珍珠岩与珍珠岩的2：1椰油，并使用完整的营养液。在灌溉用水期间，每周两次供应植物的营养素。当植物的高度为30厘米时，进行盐分处理，并持续至完全开花。在实验结束时，测量了形态特征，包括植物高度，主茎数，侧枝数，叶面积，比叶重，茎直径，节数，第四节间长度和穗长。结果表明，盐分胁迫对叶面积，叶，茎和根的鲜重和干重，植物高度，侧枝数，节数，第四节间长度和穗长有显着影响。在对照处理中观察到最高叶面积，叶干重，植物高度和侧枝数。盐度为120 mM时，叶面积和叶干重最低，而盐度为90 mM和120 mM时，最低植株高度和侧枝数最少。盐度对枝根鲜重，根鲜重，叶比重，主茎数和茎直径无显着影响。根据结果​​，留兰香似乎对盐分胁迫敏感，并且不能耐受高于30 mM氯化钠的盐分水平。

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