Paper Information

Journal:   IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES   2004 , Volume 18 , Number 2; Page(s) 0 To 0.
 
Paper: 

EFFECT OF ZINC SULFATE ON CORN RESISTANCE TO BORON TOXICITY

 
 
Author(s):  HOSSEINI SEYED MASHA ELAH, MAFTOUN M., KARIMIAN N., ROUNAGHI A.A.M., EMAM Y.
 
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Abstract: 

Boron (B) toxicity due to the application of saline waters is one of the most important limiting factors for corn (Zea mays L.) production in southern Iran. In recent years, some nutrients such as zinc (Zn) have been used for reducing the adverse effects of B toxicity. A greenhouse experiment was conducted to determine the effect of Zn on corn resistance to B toxicity. Treatments consisted of seven levels of B (0, 2.5, 5, 10, 20, 40, and 80 µg g-1 as boric acid) and three levels of Zn (0, 5, and 10 µg Zn g-1 soil as ZnSO4). The statistical design was completely randomized factorial with three replicates. Boron application reduced plant height and shoot dry matter of corn. Low B levels increased whereas high B levels decreased uptake and apparent recovery of B. Application of B increased B concentration in plant. Low and moderate B levels increased but high B levels decreased Zn concentration and uptake. Zinc application increased plant height, shoot dry matter and Zn uptake and concentration in the plant tissue, and also decreased B concentration and affected B uptake. The results show that in soils with high levels of B, the application of zinc sulfate may reduce the adverse effects of B toxicity and, consequently, increase corn yield.

 
Keyword(s): ZINC, BORON, TOXICITY, CORN, PLANT NUTRITION
 
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