| 土壤盐分对烤烟各器官干物质重及矿质元素吸收分配的影响 |
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| 引用本文： | 马静,李雪利,王鹏,孙曙光,马君红,潘昊东,姚鹏伟,王静,叶协锋.土壤盐分对烤烟各器官干物质重及矿质元素吸收分配的影响[J].中国烟草学报,2020,26(3):74-83. |
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| 作者姓名： | 马静 李雪利 王鹏 孙曙光 马君红 潘昊东 姚鹏伟 王静 叶协锋 |
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| 作者单位： | 1.河南农业大学烟草学院, 国家烟草栽培生理生化研究基地, 烟草行业烟草栽培重点实验室, 郑州 450002 |
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| 基金项目： | 国家自然基金41907076烟草行业烟草栽培重点实验室项目30800665湖北中烟工业有限责任公司项目2018420000340359 |
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| 摘 要： | 目的 探究土壤盐分对烤烟干物质积累和矿质元素含量的影响。 方法 采用盆栽试验，以中烟100为试验材料，以前期调查当地烟田20个样点耕层平均盐分浓度和离子组成为基准，用CaCl2、Ca（HCO3）2、MgSO4、K2SO4、Na2SO4模拟实际土壤盐分组成，分别以含3倍、6倍、9倍、12倍基准的土壤盐分状况研究对烤烟干物质重和不同器官矿质元素含量、Ca/Na、K/Na及Ca、K选择性运输能力的影响。 结果 ① 在同一生育期，随盐浓度的升高，烤烟各器官干物质重先增后降，在3倍基准浓度处理下干物质重最大，烤烟叶片中的K含量也有增加；随盐浓度的升高，K、Ca、Cu、Fe、Mn元素在部分时期的吸收受到限制。②烤烟各器官K/Na和Ca/Na随盐分浓度的升高而降低，在高盐浓度条件下，烤烟K/Na表现为根>叶>茎。③高盐浓度会在一定程度上促进茎到叶的SK，Na和SCa，Na，抑制根到茎的SK，Na和SCa，Na。 结论 烤烟对低浓度盐分有一定的耐受能力，但高盐浓度下，矿质营养吸收和分配平衡被破坏，影响烤烟生长发育。
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| 关 键 词： | 盐 烤烟 干物质重 矿质元素 |
| 收稿时间： | 2019-10-21 |
Effects of soil salinity on dry matter weight and absorption and distribution of mineral elements in flue-cured tobacco organs |
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| Abstract: | In order to explore the effects of soil salinity on dry matter accumulation and mineral element content of flue-cured tobacco, a pot experiment was carried out. In this study, Zhongyan 100 was used as the test material, and the average salt concentration and ion composition of the cultivated layer of 20 sample sites in previous surveyed local tobacco field were used as the benchmark. The actual soil salt composition was simulated with CaCl2, Ca(HCO3)2, MgSO4, K2SO4, Na2SO4. The effects of 3, 6, 9 and 12 times of soil salinity on dry matter weight, mineral element content in different organs, Ca/Na, K/Na, Ca and K selective transport capacity of flue-cured tobacco were studied. During the same growth period, with the increase of salt concentration, the dry matter weight of various organs of flue-cured tobacco increased first and then decreased. Under 3-fold baseline concentration treatment, the dry matter weight was the highest and the K content in flue-cured tobacco leaves also increased; With the increase of salt concentration, the absorption of K, Ca, Cu, Fe, Mn elements in some periods was restricted. K/Na and Ca/Na in various organs of flue-cured tobacco decreased with the increase of salt concentration. Under high salt concentration, K/Na in different organs of flue-cured tobacco can be ranked as root > leaf > stem. High salt concentration promoted stem-to-leaf transportation of SK, Na and SCa, Na to a certain extent, and inhibited root-to-stem transportation of SK, Na and SCa, Na. Flue-cured tobacco has a certain tolerance to low concentration of salt, but under high salt concentration, the absorption-distribution balance of mineral nutrients is destroyed, which will negatively affect the growth and development of flue-cured tobacco. |
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