Ghollarata, M., Raiesi, F., Nadian, H. (2009). Investigation the Effects of Salinity and Soil Phosphorus on Respiration, Microbial Biomass and Phosphatase Activities in the Rhizosphere of Berseem Clover (Trifolium alexandrinum L.). , 22(2), 217-223. doi: 10.22092/ijsr.2009.127000
M. Ghollarata; Fayez Raiesi; H. Nadian. "Investigation the Effects of Salinity and Soil Phosphorus on Respiration, Microbial Biomass and Phosphatase Activities in the Rhizosphere of Berseem Clover (Trifolium alexandrinum L.)". , 22, 2, 2009, 217-223. doi: 10.22092/ijsr.2009.127000
Ghollarata, M., Raiesi, F., Nadian, H. (2009). 'Investigation the Effects of Salinity and Soil Phosphorus on Respiration, Microbial Biomass and Phosphatase Activities in the Rhizosphere of Berseem Clover (Trifolium alexandrinum L.)', , 22(2), pp. 217-223. doi: 10.22092/ijsr.2009.127000
Ghollarata, M., Raiesi, F., Nadian, H. Investigation the Effects of Salinity and Soil Phosphorus on Respiration, Microbial Biomass and Phosphatase Activities in the Rhizosphere of Berseem Clover (Trifolium alexandrinum L.). , 2009; 22(2): 217-223. doi: 10.22092/ijsr.2009.127000

Investigation the Effects of Salinity and Soil Phosphorus on Respiration, Microbial Biomass and Phosphatase Activities in the Rhizosphere of Berseem Clover (Trifolium alexandrinum L.)

پژوهش های خاک
Volume 22, Issue 2, February 2009, Pages 217-223    PDF (227.41 K)
Document Type: Research Paper
DOI: 10.22092/ijsr.2009.127000
Authors
M. Ghollarata* 1; Fayez Raiesi2; H. Nadian3
1Researcher
2Associate Professor, Shahr-e Kord University
3Associate Professor, Molla Sani-e Ahvaz University
Abstract
In order to investigate the effects of salinity and soil phosphorus on respiration, microbial biomass and phosphatase activities in the rhizosphere of berseem clover (Trifolium alexandrinum L.), an factorial experiment was arranged in a randomized complete block design with four levels of salinity (S1= 0.12, S2= 2, S3= 6 and S4= 10 dS/m) and two levels of phosphorus (P1= 10 and P2= 30 mg/kg ) from KH2PO4  sources with four replications under greenhouse conditions. Different levels of salinity were produced by NaCl, MgCl2, Na2SO4 and MgSO4 with weight proportional 2, 1, 1 and 1 respectively. The traits such as Soil respiration, Substrate-Induced Respiration (SIR), Microbial biomass and activities of Acid and Alkaline phosphatase enzymes in the rhizosphere of berseem clover were measured. The salinity was applied using saline water with the above- mentioned electrical conductivities. The results show that an increase in soil phosphorus increases soil respiration but decreased microbial biomass, SIR and acivities of acid and alkaline phosphatase. All measured traits were reduced with an increase in salinity. 
Keywords
Berseem Clover; Substrate- Induced Respiration (SIR); Acid and Alkaline Phosphatase; Microbial Biomass; Rhizosphere
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