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Untersuchungen zur Bedeutung des Ernährungszustandes von Kulturpflanzen für ihre Salztoleranz
Author(s) -
Schleiff U.,
Finck A.
Publication year - 1976
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19761390303
Subject(s) - nutrient , soil water , salinity , agronomy , greenhouse , salt (chemistry) , chemistry , potassium , horticulture , environmental science , biology , ecology , organic chemistry , soil science
Investigations on the significance of the nutritional status of plants for their salt tolerance In order to explain the causes of salt damages on crops in the Sibari Plain (Southern Italy) the nutrient contents of plants were used in addition to soil data. Increasing Na‐ and Mg‐salinity reduced the K‐contents of wheat plants during sprouting below the (preliminary) critical value of 30% o and the Ca‐contents below the value of 3% o in spite of high gypsum contents and optimum K‐supply of the soils (compared to soils with low salt contents). The content of nutrient elements can be improved by an increased nutrient supply up to the optimum range, and the content of detrimental elements in plants can be reduced below toxic limits. The specific toxicity of Mg‐salts (believed to be especially high) could be prevented by optimum nutrition of the plants until general salt effects became dominant factors of damage. At optimum nutrient supply 6–7% o Mg in the tops of corn plants were toxic in greenhouse experiments. In the field even at high Mg‐supply of the soils no more than 2,5% o Mg were found in cereals. At optimum K‐supply more than 1–2% o Na in wheat plants reduced the yield. The salt tolerance of plants, therefore, can be increased by proper fertilisation.