Articles
TREND OF SOIL SALINIZATION AND ITS EFFECT ON PISTACHIO YIELD OF RAFSANJAN ORCHARDS
Article number
940_41
Pages
287 – 292
Language
English
Abstract
In Rafsanjan (Iran) area (including Rafsanjan, East and West suburbs, Koshkueieh, Anar, Noogh, and Kabootarkhan) by review of local map of desired mentioned location, and the existing result of water sample analysis of the area plus preliminary on-farm observations, some orchards which have had our preferred relative conditions were selected randomly.
Along with these activities, feasible place for excavation of the soil profile was marked out.
In another step, the writing of the soil profile description was done by teamwork of soil scientists for the depth of 0-40, 40-80 and 80-120 cm in soil profile.
Soil samples were taken from above depths.
The electrical conductivity (ECe) of soil extract, other routine analyzed factors and needed items for the above samples were measured in the lab.
Some other data in relation to the orchard which were selected and samples gathered too.
These items were general questions about the orchard management parameters.
The obtained data together with general information about the orchards were processed in Excel media.
In this software, desired charts and figures were analyzed by linear regression method.
This curve display and its process were also done by the use of SPSS, SAS, and other needed ones.
As a whole the results reveal that:
– Salinity threshold (here defined as the average soil salinity of 40-120 cm of soil profile layer after which yield decreases) for pistachio is 8.65 for ECe and 4.2 (about 4) dS m-1 for irrigation water (ECiw). The above mention yield was related to almond-shape pistachio cultivars such as Akbari or Ahmadaghaei.
– The obtained results also showed that the reasonable orchard management, especially amount of irrigation water, is able to change the yield amount considerably in saline conditions.
We should keep in mind that obtained results are general relationships and their precise amounts are greatly dependent on specific conditions of regional orchards.
Along with these activities, feasible place for excavation of the soil profile was marked out.
In another step, the writing of the soil profile description was done by teamwork of soil scientists for the depth of 0-40, 40-80 and 80-120 cm in soil profile.
Soil samples were taken from above depths.
The electrical conductivity (ECe) of soil extract, other routine analyzed factors and needed items for the above samples were measured in the lab.
Some other data in relation to the orchard which were selected and samples gathered too.
These items were general questions about the orchard management parameters.
The obtained data together with general information about the orchards were processed in Excel media.
In this software, desired charts and figures were analyzed by linear regression method.
This curve display and its process were also done by the use of SPSS, SAS, and other needed ones.
As a whole the results reveal that:
– Salinity threshold (here defined as the average soil salinity of 40-120 cm of soil profile layer after which yield decreases) for pistachio is 8.65 for ECe and 4.2 (about 4) dS m-1 for irrigation water (ECiw). The above mention yield was related to almond-shape pistachio cultivars such as Akbari or Ahmadaghaei.
– The obtained results also showed that the reasonable orchard management, especially amount of irrigation water, is able to change the yield amount considerably in saline conditions.
We should keep in mind that obtained results are general relationships and their precise amounts are greatly dependent on specific conditions of regional orchards.
Authors
M. Moazenpour Kermani, H. Hokmabadi
Keywords
salinity, irrigation, electrical conductivity, pistachio
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