تغذيه فسفري شش رقم پسته با توجه به نوع خاك و وضعيت ميكوريزي گياهان

Phosphorus nutrition of six pistachio cultivars with regard to soil types and mycorrhizal status of the plants

The important role of vesicular-arbuscular mycorrhizal VAM symbiosis in phosphorus nutrition of plants has been appreciated for a long time. Meanwhile, investigation in the role of mycorrhizal symbiosis on pistachio cultivars has been neglected. This study was carried out due to the economically importance of the tree and regarding to its various cultivars which are used as base plants in grafting after growing in different soils. In a randomized complete block design (RCBD) six cultivars of Pistachia vera were grown in pots at green house condition in seven soil types of pistachio cultivating areas of Kerman province. Physical characteristic of soils including their spore and phosphorus nitrogen , potassium , pH , EC were measured before cultivating plants.After growing the plants, their dry weight ,shoot and root length , root infection of plants with mycorrhizal fungi and their total phosphorus amounts were measured. Different cultivars showed significant differences in total dry weights and total plant phosphorus ,shoot and root length and root infection rates. Data analysis also showed significant differences between soils in case of spore count and phosphorus amounts before and after growing plants.