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The cooling requirement of Iranian pistachio cultivars is Iranian Pistachio about 1200-600 hours. No

 

Providing cooling needs of pistachio trees causes delay in flowering, irregular flowering,

 

Reduce the number of leaflets, produce simple and abnormal leaves and flower zinc

 

The growth branches of the current season are lateral and lateral. Pistachio is the same

 

Other deciduous trees require a certain minimum of cold to develop buds

 

For 1000 hours at a temperature of less than 7 degrees Celsius during the sleep period

 

It is winter. Akbari and Cherokee cultivars need colder than other pistachio cultivars

 

It has more than 1000 hours. In the winter of 1993 due to relative warmth

 

The weather reduced the need for cooling, familiarity with the operation, and some pistachio crops

 

Pistachio cultivars, including Akbari cultivar, were not supplied throughout the country and caused a decrease

 

The performance was over. For example, accumulated cold based on meteorological data

 

Rafsanjan until February 6, 1994 based on the calculation of the Utah method 624 hours and

 

The method from zero to 7 degrees Celsius was 625 hours as predicted

 

By the end of that year, 800 hours of cold will be provided. But for Akbari figure this

 

The need for cooling is not enough and this need will be met by the methods described

 

, To be eliminated. One of the methods to meet the cooling needs of Akbari cultivars

 

Pistachio is the use of volk oil. Due to temperature fluctuations in the use of oil

 

Volk is recommended as follows:

 

Soil and fresh water: Akbari cultivar 40 per thousand and other cultivars in the proportion of 30 per thousand

 

Soil and saline water: Akbari cultivar 50 per thousand and other cultivars 40 per thousand

 

Soil and saline EC is above 12. Due to the importance of Volk oil in the removal

 

To meet the cooling needs of pistachio trees, it is necessary to provide points in this regard:

 

First point: these materials are emulsifiable oils, Volk 92, Supravilo and…

 

They are famous. In fact, substances from the group of aliphatic hydrocarbons are from

 

Paraffin oils are made with petroleum derivatives.