|Table of Contents|

Effects of Simulated Salt and Alkali Conditions on the Mineral Nutrition of Helianthus annuusL.(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2014年02期
Page:
1-5
Research Field:
Publishing date:

Info

Title:
Effects of Simulated Salt and Alkali Conditions on the Mineral Nutrition of Helianthus annuusL.
Author(s):
LIU Jie 1; 2
1.Weifang University of Science and Technology，Shouguang，Shandong 262700；
2.School of Life Science，Northeast Normal University，Changchun，Jilin 130024
Keywords:
Helianthus annuusL.; salt stress; salt- alkaline mixed stress; mineral nutrition
PACS:
S 565. 5
DOI:
-
Abstract:
Taking ‘Baikuiza No. 6’ Helianthus annuusL.as material，under salt stress and salt- alkaline mixed stress，which were established by mixing NaCl，Na2SO4，NaHCO3 and Na2CO3 at various proportions.Several indices of seedlings stressed- including growth and mineral elements contents were determined.On the base，by analyzing the status of mineral ions outside the roots and the level of mineral nutrition of plant body，an investigation into the different effects of ion absorption about salt stress and alkali stress were carried out.The results showed that there were significant difference on mineral nutrition content between salt stress and salt alkaline mixed stress.The contents of N，P，S and Fe did not decrease，but increased under salt stress；while contents of almost all mineral nutrients declined under salt- alkaline mixed stress.High pH caused ionic activity and free concentrations of some mineral elements to decline sharply and even to precipitate coupled with the reduction of the absorption capacity of roots,which was the fundamental reason that alkali stress showed nutrient stress.Nutritional damage of alkali stress was not only one of the main baneful factors，but also one of the main reasons why it was more severe than salt stress.

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Last Update: 2014-08-09