首页>
外文期刊>Advances in Environmental Sciences
>Investigation of characteristics and rating of saline-sodic soils and effect of important parameters on pistachio yield in Kerman province
【24h】
Investigation of characteristics and rating of saline-sodic soils and effect of important parameters on pistachio yield in Kerman province
Kerman Province, located in southeastern Iran, is the global center of pistachio production.Excessive development of pistachio cultivation over the province due to use of land with low orinsufficient potentials, resulting in reduced yield. The main objective of this study is defining thecharacteristics of saline and alkaline soils and their effect on pistachio yield. For this purpose, 88orchards were selected in important pistachio plain with diversity in soil and crop, then drilling andsampling of a profile was done at any point and questionnaires were prepared for the functionalmanagement. In this study, regression analyses were used to study the effects of different landcharacteristics on the yield of pistachios. Results of study in the 6 areas showed that the salinity averagewas about 4 to more than 50 and SAR also varies from about 8 to 70. Average total salinity and SAR was22.5 dS m-1 and 22, respectively in studied profiles. Threshold limit of salinity and SAR for pistachio was9 dS m-1 and 12 respectively and their break-even yield (marginal yield) was 28 dS m-1 and 30respectively. Comparison of salinity and SAR of studied soils with their critical and economy level showedthat about 80% of the land under cultivation has been adversely affected of salinity and alkalinity and inabout 35% of this land, salinity and SAR were more than break-even yield level. Investigation ofregression equations revealed that correlation coefficient for salinity and SAR with yield was 63 and 57dS m-1 respectively, so that these parameters have a significant effect on yield of pistachio. Apart fromthese parameters, properties such as gypsum, organic carbon, soil texture, structure and gravel are alsolimiting yield of pistachio. Due to the adverse effects of soil salinity on pistachio yield, soil managementand desalinization is essential for the optimal use of resources. As well as is recommended the mappingand monitoring of the soil salinity and alkalinity and removing gardens with the low yield.
展开▼
