Effect of Rates and Methods of Zinc Application on Yield and Fruit Quality of Satsuma Mandarin

Document Type : Research Paper

Authors

1 Researcher, Agricultural and Natural Resources Research Center of Mazandaran

2 Agricultural and Natural Resources Research Center of Mazandaran

3 Professor, Tarbiat Modarres University

4 Researcher, Citrus Research Institute

Abstract

Zinc deficiency, which usually appears as chlorotic pattern on new growth, is considered one of the most prominent nutritional disorders in citrus trees. This study was conducted to evaluate the effects of the rates and methods of zinc application on yield and quality of citrus fruits . The experiment was conducted at Sari Kotra – Horticultural Research Station in Mazandaran province during 1999 – 2002 period. A complete randomized block design was used with ten treatments and four replications. Treatments included:To- controls, T1- 50g Zn per tree as broadcast application, T2-100g Zn per tree as broadcast application, T3- 200g Zn per tree as broad cast application, T4- 50 g Zn per tree as banding application, T5- 100g Zn per tree as banding application, T6-200g Zn per tree as banding application, T7- foliar application with concentration of 2kg ZnSO4 in 1000 lit water, T8- foliar application with concentration of 3kg ZnSO4 in 1000 lit water , T9- foliar application with concentration of 4kg ZnSO4 in 1000 lit water. Results of experiment with Satsuma mandarins showed that zinc application increase fruit yield and also leaf zinc concentration significantly and the highest yield and leaf zinc concentration was associated with treatment T9. Also, effect of the rates and methods of zinc sulfate application on the average fruit weight was significant and the highest average fruit weight was obtained from foliar application with concentration of 3kg ZnSO4 in 1000 lit water that was almost 23 percent more than the control. Application of zinc sulfate increased fruit diameter significantly compared with the control. The highest diameter of peel was obtain from treatment T5 that increased almost 17 percent over the control. The effect of zinc sulfate application on shelf life of Satsuma mandarin showed that the lowest and highest weight reduction was obtained in treatment T6 and  treatment T5, respectively . 

Keywords

References

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Iranian Journal of Soil Research
Volume 21, Issue 1
May 2007
Pages 1-14

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