Phosphorus Availability and Some Biological Properties in the Bean (Phaseolus vulgaris) Rhizosphere |
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| Authors: | Tahereh Raiesi Ali Reza Hosseinpur |
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| Institution: | 1. Horticultural Science Research Institute, Citrus and Subtropical Fruit Research Center, Agricultural Research and Education Organization (AREO), Ramsar, Iran;2. Agriculture College, Soil Science Department, Shahrekord University, Charmahal-Bakhtiari, Iran |
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| Abstract: | The objectives of this research were to evaluate the rhizospheric effects of bean (Phaseolus vulgaris) on phosphorus (P) availability and dissolved organic carbon (DOC), microbial biomass carbon (MBC), microbial biomass phosphorus (MBP), alkaline phosphatase (ALP) and P in the particulate fraction (PF-P) in some calcareous soils under rhizobox conditions. The results showed that DOC, MBC, MBP and ALP strongly increased in the rhizosphere soils compared with the bulk soils (p < 0.05). Also, the amounts of PF-P and P extracted with different tests in the rhizosphere were lower compared to the bulk soils (p < 0.05). The correlation studies showed that plant indices (dry yield and P uptake) had a positive relationship with Olsen-P, MBP, DOC, ALP and PF-P in both the rhizosphere and the bulk soil. Therefore, bean rhizosphere caused increases of DOC, MBC, MBP and ALP and decreases of available P and PF-P in the studied soils. In addition, the results of this research showed that the Olsen-P method and MBP and PF-P could be used to estimate bean-available P in the studied calcareous soils. |
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| Keywords: | Chemical extractants MBP PF-P phosphorus rhizosphere |
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