S171 : The effect of thiobacillus and Pseudomonas bacteria with elemental sulfur and green manure on soluble phosphorus from phosphate rock
Thesis > Central Library of Shahrood University > Agricultural Engineering > MSc > 2014
Authors:
Abstarct: Calcareous soils that include most of our agricultural lands and gardens have caused a reduction in the use of phosphorus fertilizers, thus farmers every year, add a huge amount these fertilizers to lands that are under cultivation causing the aggravation and fixation of phosphor in the soil. On the other hand, the shortage of phosphor sources and high cost of importing such fertilizers are another problematic matter and high consumption of them might result environmental pollutions. Direct use of phosphate rocks could be a supply source of phosphor for plants. Phosphate soil originated from phosphate rock inoculation with the use of Thiobacillus, Pseudomonas , sulfur and organic compounds could provide the phosphor from the phosphate rock or the phosphor could be obtained from the soil just by bacteria inoculation, the utilization of sulfur and organic compounds. The purpose of this research is to examine the effects of Thiobacillus, Pseudomonas, sulfur and green manure on phosphor and some other soil traits. This research was carried out baxsed on a complete randomized design on 2 types of soil with 10 treatments and 3 repetitions. The applied treatments included sulfur, green manure, Thiobacillus neopum and Pseudomonas fluorescens. 50 gram samples were made and 0.5% sulfur, 2% green manure and 1% phosphate soil were added to them according to the treatment type. The soils were sampled in 5, 20, 50, 100, 150 day intervals and soil characteristics like pH, EC, soluble sulfate, soluble phosphorus and available phosphorus were measured. The results showed that applying fertilizing treatments have had a positive effect on the reduction of pH. Applying fertilizing treatments caused the EC and soil salinity to increase, indicating a positive result. Moreover the increase of soluble phosphorus and available phosphorus proved to be a good sign but the increase of soluble phosphorus was notable, the amount of Soluble sulfate was also increased by applying fertilizing treatments. Green manure, sulfur and thiobacillus neopum treatments were affected the most.
Keywords:
#Phosphate Rock #Thiobacillus neopum #Pseudomonas fluorescens #Sulfur #Green Manure Link
Keeping place: Central Library of Shahrood University
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Keeping place: Central Library of Shahrood University
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