ISHS Acta Horticulturae 726: IV International Symposium on Pistachios and Almonds
THE EFFECT OF DIFFERENT MINERAL NUTRIENTS ON EARLY SPLITTING IN PISTACHIO |
| Authors: | J. Hosseinifard, B. Panahi |
| Keywords: | Iran, iron, potassium, pistachio (Pistacia vera L.) |
| Abstract:
Some pistachio nuts rupture their hulls in the orchard prior to harvest and are known as “early splits”. Even though relatively few nuts become early splits, these nuts are va ery important factor, because their kernels are frequently decayed by fungi and contaminated with aflatoxin. Unbalanced nutrition of pistachio may be correlated with early splitting, which caused Aspergillus infection. Previous research has revealed that K, Fe and P deficiency and Zn toxicity are correlated with early split occurrence. Furthermore, a positive and significant correlation between Cu content in leaf with early splitting and a negative, significant correlation between percentage of K and Ca in leaf have been reported. The aim of current research was the evaluation of the effects of spraying Fe nutrient element; combination of Fe, Zn, Mn, Cu, and application of buried elements in soil such as K2So4, Fe, Zn on early splitting percentage, in separate experiments. The results indicated that Fe and its proportions to other nutrient elements were an important factor that affected on early splitting. In addition, a positive and significant correlation between early splitting and Cu content in leaf was observed in different experimental areas. The experimental treatments caused a non-significant increase of K level in leaf. Furthermore, these data were proved that a balanced mineral nutrition plays a key role in remained intact hulls to cover and protect the kernel from invasion by molds. | |
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