盐分和水分胁迫对落羽杉幼苗的生长量及营养元素含量的影响

doi:10.11707/j.1001-7488.20040610

林业科学 ›› 2004, Vol. 40 ›› Issue (6): 56-62.doi: 10.11707/j.1001-7488.20040610

盐分和水分胁迫对落羽杉幼苗的生长量及营养元素含量的影响

汪贵斌曹福亮

南京林业大学森林资源与环境学院,南京210037

收稿日期:2002-06-02 修回日期:1900-01-01 出版日期:2004-11-25 发布日期:2004-11-25

Effect of Salt Stress on Growth and Uptake of Nutrient of Taxodium distichum under Varying Soil Water Content

Wang Guibin,Cao Fuliang

College of Forest Rosources and Environment, Nanjing Forestry University Nanjing210037

Received:2002-06-02 Revised:1900-01-01 Online:2004-11-25 Published:2004-11-25

摘要/Abstract

摘要：

采用温室盆栽试验方法,研究了不同土壤水分下盐胁迫对1年生落羽杉实生苗的生长及营养吸收的影响。试验共12种处理,3种水分水平(W₁ ,淹水;W₂ 、W₃,土壤含水量分别为田间持水量的75%和25% ) ,每种水分下设4种盐分处理(NaCl含量为土壤干重的0、0.15%、0.3%和0.45% ) ,处理时间为130d。结果表明:土壤盐分胁迫下落羽杉幼苗的生长及对营养的吸收发生了显著的变化,这种变化又因土壤含水量的不同而不同。落羽杉相对高生长、相对地径生长和生物量增量随着土壤盐分浓度的增加和土壤水分含量的减少而减少。在淹水条件下,随着土壤盐分浓度的增加,落羽杉幼苗根、茎、叶中全N、全P、全Na,以及叶片中的全Ca、全Fe的含量均随着升高,而根、茎中的全Fe、全Ca、全Mg含量差异较小。在W₂ 水分条件下,各种盐分处理都在不同程度上增加了根、茎、叶中全N、全Na、全Ca和全Fe含量,茎和叶中全P、全K和全Mg含量,而根系中的全P、全K和全Mg含量在盐分浓度较高时有所下降。在W₃水分条件下,各种土壤盐分不同程度地增加了叶片全N、全P和全K含量,茎和叶中全Mg和全Ca含量,以及根、茎、叶中全Na含量,而茎和根中全N、全P和全K含量,根、茎和叶中全Fe含量均随着土壤盐分浓度的增加而下降。

关键词: 土壤水分, 盐胁迫, 落羽杉, 生长量, 营养元素含量

Abstract:

One-year-old seedlings of Taxodium distichum were grown in a pot under greenhouse conditions with varying soil water contents (W₁, flooding; W₂, 75 of field water capacity; W₃, 25 of field water capacity), and there were four salt (NaCl) contents (0, 0.15, 0.3 and 0.45 of dry weight of soil)under every water content to study the effects of soil water and salt contents on growth and uptake of nutrients of T.distichum. The time of treatment was 130 days. The results showed that there were significant effects of soil water and salt contents on growth and uptake of nutrients of T.distichum. The relative height growth, relative ground diameter growth and biomass increment decreased with increase of soil salt content and decrease of soil water content. The total N, P and Na content in root, stem and leaf and the total Ca and Fe content in leaf increased with increase of soil salt content under the soil condition of flooding, while the total Fe, Ca and Mg content in stem and root had little significant difference. The total N, Na, Ca and Fe content in root, stem and leaf and the total P, K and Mg content in stem and leaf increased in a different degree with increase of soil salt content under the soil condition of W₂, while the total P, K and Mg content in stem decreased under higher soil salt content. The total N, P and K content in leaf, the total Ca and Mg content in stem and leaf and the total Na content in root, stem and leaf increased in a different degree with increase of soil salt content under the soil condition of W₃, while the total N, P and K content in stem and root and the total Fe content in root, stem and leaf decreased with increase of soil salt content.

Key words: Soil water content, Salt stress, Taxodium distichum, Growth, Uptake of nutrient

汪贵斌曹福亮. 盐分和水分胁迫对落羽杉幼苗的生长量及营养元素含量的影响[J]. 林业科学, 2004, 40(6): 56-62.

Wang Guibin;Cao Fuliang. Effect of Salt Stress on Growth and Uptake of Nutrient of Taxodium distichum under Varying Soil Water Content[J]. Scientia Silvae Sinicae, 2004, 40(6): 56-62.

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盐分和水分胁迫对落羽杉幼苗的生长量及营养元素含量的影响

Effect of Salt Stress on Growth and Uptake of Nutrient of Taxodium distichum under Varying Soil Water Content

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