• Title/Summary/Keyword: 호기

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Optimum Management Plan of Swine Wastewater Treatment Plant for the Removal of High-concentration Nitrogen (고농도 질소제거를 위한 축산폐수 처리시설 적정관리 방안)

  • Shin, Nam-Cheol;Jung, Yoo-Jin;Sung, Nak-Chang
    • Korean Journal of Environmental Agriculture
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    • v.19 no.3
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    • pp.194-200
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    • 2000
  • The amount of swine wastewater reaches about $197,000m^3$ per day at live-stock houses in the whole country. A half of the swine wastewater resources are too small to be restricted legally. This untreated wastewater causes the eutrophication in the water bodies. In case of swine wastewater treatment, the solid-liquid separation must be performed because feces(solid phase) and urine(liquid phase) have large differences in nitrogen and phosphorus concentration. It is necessary to assess exactly the concentration of the pollutants in swine wastewater for planning the wastewater treatment facilities. A full-scale operation was carried out in K city and the plant is consists of conventional plant, the supplementary flocculation basin of chemical treatment process and $anaerobic{\cdot}aerobic$ basin for nitrogen removal. The improved full-scale swine wastewater treatment plant removed the $1,500{\sim}3,000mg/l$ of total-nitrogen(T-N) to 120mg/l of T-N and $131{\sim}156mg/l$ of total-phosphorus(T-P) to $0.15{\sim}1.00mg/l$ of T-N. Accordingly, as a results of operational improvement, the removal efficiencies of T-N and T-P were over $92{\sim}96%$, 99%, respectively. The continuous supply of organic carbon sources and the state of pH played important roles for the harmonious metabolism in anaerobic basin and the pH value of anaerobic basin maintained at about 9.0 for the period of the study.

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Effects of Supplemental Synbiotics Composed of Anaerobic Bacteria, Yeast and Mold on the Aerobic Stability of Total Mixed Ration for Cattle (혐기성 박테리아, 효모 및 곰팡이로 제조된 synbiotics의 첨가가 축우용 완전혼합사료의 호기적 안전성에 미치는 영향)

  • Lee, Shin-Ja;Shin, Nyeon-Hak;Jung, Ho-Sik;Hyun, Jong-Hwan;Moon, Yea-Hwang;Lee, Sang-Suk;Lee, Sung-Sill
    • Journal of Life Science
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    • v.18 no.10
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    • pp.1426-1434
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    • 2008
  • This study was conducted to investigate the effects of supplementation of synbiotics manufactured with anaerobic bacteria, yeast and mold on preservation of total mixed ration (TMR) by exposing days. Eight treatments were composed of untreated synbiotics(US), bacterial synbiotics (BS), yeasty synbiotics (YS), moldy synbiotics (MS), bacterial and mouldy synbiotics (BMS), yeasty and moldy synbiotics (YMS), bacterial and yeasty synbiotics (BYS), and bacterial, yeasty and moldy synbiotics (BYMS). After 7 days of anaerobic fermentation, fermented-TMRs were exposed to the air during 1, 3, 5, 7, 14 and 21 days. One hundred forty four (8 treatments${\times}$6 days${\times}$3 replications) fermented-TMRs were manufactured by vinyl bag ($43\;cm{\times}58\;cm$). Although no significant differences in the activities of carboxymethylcellulase, xylanase and amylase were observed among treatments, theirs acivities were seemed to increase by treatment of BYS or YMS containing yeast. Total bacterial and mold counts also decreased in the treatments containing yeast. Potential pathogenic bacteria were less detected in BYS and BMYS for E. coli, BMYS and YS for Salmonella, and BMS and BMYS for Shigella than those of the other treatments, MS was, however, contaminated easier than US by pathogenic bacteria. From above results, synbiotics containing facultative anaerobic yeast have effects for preservation of TMR fermented anaerobically. Particularly, BMYS treatment having good results in nutrient contents, dry matter loss and pathogenic bacteria amounts was a resonable synbiotics for preservation of the fermented-TMR.

Pathogenic Staphylococcus epidermidis isolated from cultured fingerling of sea bass, Lateolabrax japonicus, in Korea (남해안 양식산 농어, Lateoabrax japonicus 치어에서 분리한 병원성 Staphylococcus epidermidis에 관한 연구)

  • Cha, Yong-Baeg;Yang, Han-Choon;Choi, Sang-Duk;Cho, Jae-Kwon
    • Journal of fish pathology
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    • v.10 no.1
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    • pp.1-14
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    • 1997
  • Major object of this study was to investigate the causative organism of th e diseased cultured fingerling of sea bass, L japonicus. The experimental results are summarized as follows ; Staphylococcus epidermidis, isolated from the liver, kidney, spleen and brain, was considered to be the causative organism. External symptoms of this disease were congestion and hemorrhages in eyes. Anatomical symptoms were hemorrhage of brain, congestion of liver, and slight swelling of kidney and spleen. Growth of the isolates was good on BHIA, HIA and Staphylococcus No. 110. The growth occurred at a range(optimum) of $10\sim45^{\circ}C(35\sim40^{\circ}C)$, 0~9% (1~3%) of NaCl concentration and pH 4~10(8). DNase and coagulase production of all isolated strains were nagative, but was positive in hemolysis. Urease was positive reaction, and novobiocin resistance was nagative. Acid was produced anaerobically from glucose and maltose. Acid was produced aerobically from glucose, galactose, sucrose, maltose and dextrine. But gas was not produced from any carbohydrates. When the isolated strain was injected intramuscularly on fingerling of sea bass, L japonicus, it had virulence at $1.7{\times}10^{10}$ viable cells/$m\ell$ for all fish examined but no virulence at $1.7{\times}10^4$ viable cells/$m\ell$. Bacitracin, Erythromycin and Nofloxacin were observed as bacteriostatic agents to the strain, but Colistin, Gentamicin and Nalidixic acid were not. There were remarkable congestion of the brain, regressive necrosis of the liver, and showed necrosis of the epithelial cells of renal tubules in kidney tissues.

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Effects of Wilting and Additives on the Fermentation Chrateristics , Quality and Aerobic Stability of Rye Silage (예건 및 첨가제가 호밀사일리지의 발효특성과 사료가치 및 호기적 안정성에 미치는 영향)

  • 이광녕;김동암
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.17 no.2
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    • pp.187-198
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    • 1997
  • This experiment was conducted to evaluate effects of wilting and additives on fermetation characteristics, quality and aerobic stability of silage of rye(Seca1e cereale L.) harvested at the early heading stage. Harvested rye was wilted or mixed with beet pulp and then treated with formic acid or lactic acid bacteria(LAB) inoculant. Treatments were consisted of direct cut(DC), wilted(WT), beet pulp added(BP), direct cut and formate applied(DF), wilted and formate applied(WF), beet pulp and formate applied(BF), direct cut and LAB inoculated(DL), beet pulp added and LAB inoculated(BL), and wilted and LAB inoculated(WL) silages. Afler 70 days of ensiling period, the silages were opened and exposed to air for 7 days, and the silages of opening day(0 day) were compared with the silages exposed to air for 7 days(7 day). 1. LAB inoculated rye silages(DL, WL, BL) lowered pH values effectively eom the third day of ensiling and showed most stable pattern of pH changes during the initial fermentation process. Direct cut and formate applied(DF), beet pulp and formate applied(BF) and beet pulp added(BP) silages were also effective in lowering pH from the seventh day thai direct cut treatment(DC). 2. pH was low below 3.7 in all treatments of 0 day. After 7-day period of aerobic exposure, DL and WL showed considerable increases in pH from 3.5 and 3.4 to 8.3 and 6.4, respectively. 3. Direct cut rye silages(DF, DC, DL) and beet pulp and formate treatment(BF) produced effluent of 121.2, 85.9, 80.3 and 34.2 mlkg, respectively and these were greater than others(P<0.01). Beet pulp retained 1.61 I/kg of effluent at the application rate of 50 kg/t in comparing BP with DC, and formate application increased the amount of effluent in comparing DF and BF with DC and BP, respectively(P<0.01). 4. Beet pulp and LAB treatment(B1) was highest in content of lactate as 3.1% and formate treated silages(DF, WF, BF) showed lower content of lactate and total acid than others. LAB inoculated(D1, WL, BL) and wilted (WT) silages were graded to be good quality as a second group by the Flieg's score. Formate applied silages (DF, WF, BF) were graded as a foum group lower than DC by one. 5. Residual content of WSC of rye silage was higher in BP, BF, DL and BL than direct cut treatment(M3) (P< 0.01). Formate application had a tendency to increase the content of residual content of WSC. 6. For the ratio of NH3-N to Total N, wilted and LAB inoculated(W1) and direct cut and LAB inoculated(D1) silages were lowest on 0 day as 8.9 and 9.3% respectively. But after 7-day period of aerobic exposure, WL and DL showed largest increase of the ratio of $NH_3-N$ to Total N from 0 day(P<0.01). 7. On 0 day wilted(WT), beet pulp and formate treatment(BF), and beet pulp and LAB treatment(B1) were lower than direct cut treatment(DC) for NDF and ADF concentrations consistently. Formate applied silages (DF, WF, BF) made little change in ADF and NDF concentrations during 7 day period of aerobic exposure. DL and WL showed a large increase in ADF and NDF concentrations under aerobic condition(P<0.01). 8. IVDMD values of wilted(WT), beet pulp added(BP), wilted and LAB inoculated(W1) and beet pulp added and LAB inoculated(B1) silages were higher than direct-cut treatmentPC) as 84.7, 84.7, 84.4 and 83.0%, respectively on 0 day. But during 7-day period of aerobic exposure, a great decreae in IVDMD of WL was showed(P<0.01). The experimental results indicate that wilted silage(WT) could be recommended as the most effective treatment for reducing efluent and increasing quality and feed value of rye silage without deteriorating aerobic stability more than direct cut treatment(DC). Additionally, under unfavorable weather condition beet pulp added and LAB inoculated treatment(T3L) might be the possible alternative for successful ensiling of forage rye.

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Effect of Glycopyrrolate on Cardiovascular System in Dogs Sedated with Medetomidine-Midazolam Combination (개에서 Medetomidine과 Midazolam 병용 투여 시 Glycopyrrolate가 심맥관계에 미치는 영향)

  • Han, Dae-Kyung;Shin, Beom-Jun;Lee, Jae-Yeon;Jee, Hyun-Chul;Park, Ji-Young;Kim, Myung-Cheol;Jeong, Seong-Mok
    • Journal of Veterinary Clinics
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    • v.26 no.4
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    • pp.317-323
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    • 2009
  • This study was performed to evaluate the effect of intravenous administration of glycopyrrolate on cardiovascular and respiratory system in dogs given intravenous medetomidine (20 ${\mu}g$/kg) and intramuscular midazolam (0.3 mg/kg) (MM). Prior to administration of MM, glycopyrrolate was administered intravenously at doses of 5 ${\mu}g$/kg (Gly-5), 10 ${\mu}g$/kg (Gly-10) or 20 ${\mu}g$/kg (Gly-20), respectively. For the control group saline was administered intravenously. In the cardiovascular system, HR, BP, RAP, PAWP, CI, SI, SVR, and PVR were measured. RR, $V_T$, $P_{ETCO2}$, and arterial blood gas analysis were measured for respiratory system. Although rapid and satisfied depth of sedation was obtained by MM, life-threatening bradycardia, the outstanding side-effect on cardiovascular system in dogs were observed. This combination also decreased CO and increased SVR, RAP, and PAWP significantly. The bradycardia could be prevented in all the glycopyrrolate treated groups, but tachycardia was observed in Gly-10 and Gly-20 groups. Significant increases in blood pressure were shown in glycopyrrolate treated groups. Also, tachycardia depends on dose of glycopyrrolate, compensating the CO. However, these were not fully reserved. In conclusion, MM combination could induce rapid and satisfied depth of sedation but was not the suitable method for the deep sedation of dogs with cardiovascular or circulatory problems.

Surgical Results of Selected Stage IIIB Non-small Cell Lung Cancer (병기 IIIB 비소세포암 환자에서의 수술 성적)

  • 민호기;김형수;유정우;최용수;김관민;김진국;장봉현;심영목
    • Journal of Chest Surgery
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    • v.36 no.3
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    • pp.157-163
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    • 2003
  • Traditionally, patients with stage IIIB non small cell lung cancer (NSCLC) have been con-sidered Inoperable due to the short-term survival rate of this disease. However, some recent papers have reported good surgical treatment results for T4 lesions in stage IIIB NSCLC. This study reports the results of stage IIIB NSCLC patients who underwent surgical treatment at our institute. Material and Method: This study includes 109 patients who were diagnosed with pathological stage IIIA lung cancer and 59 patients who were diagnosed with pathological stage IIIB at our institute between 1994 to December 2001. Patients who underwent neo-adjuvant chemotherapy and radiation therapy were excluded from this study. According to the TNM classification, 13 patients from stage IIIA were classified into T3N1, 12 into T1N2, 73 into T2N2 and 11 into T3N2. Stage IIIB patients consisted of 26 patients with T4N0, 18 with T4Nl, 14 with T4N2, and 1 with T4N3. Result: The 30-day mortality for stage IIIA and IIIB were 4.58% and 5.08% respectively. The overall survival rate at the 1st, 2nd, 3rd, and 5th year were 69.1%, 53.7%, 41.6%, and 30.7% respectively in stage IIIA and 68.8%, 55.6%, 42.9%, and 35.9% respectively in stage IIIB. Patients with satellite nodules in the same lobe & no Iymph node involvement had a survival rate of 53.9% in 3 years compared with 15.2% in patients with satellite nodules in the same lobe with Iymph node involvement. Conclusion: Surgical treatment is recommended for selected stage IIIB NSCLC patients (pathological N0 stage & completely resectable patients), particularly for patients with satellite nodules in the same lobe & no lymph node involvement.

Simple and Effective Surgical Repair with Vascular Graft Strip for Ischemic MR (인조혈관대를 이용한 허혈성 승모판막 폐쇄부전의 수술적 치료)

  • 민호기;이승훈;이주현;성기익;박계현;전태국;박표원;이영탁
    • Journal of Chest Surgery
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    • v.36 no.9
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    • pp.646-650
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    • 2003
  • Many surgical techniques for ischemic mitral regurgitation (IMR) have been used with their excellent results and advantages. Here, we report our simple posterior annuloplasty techniques using vascular graft strip with their early results. Material and Method: Twenty two patients (13 male) underwent the operations for IMR (excluding the papillary muscle rupture) from December 2001 to January 2003. Preoperative risk factors were low ejection fraction (<35%, n=9), hypertension (n=13), diabetes (n=9), and renal failure (Cr>2.5, n=4). The wide dissection beneath the both vena cavae and interatrial groove after bicaval cannulation enabled the easy exposure of mitral valve even in the small left atrium. After eight or nine interrupted sutures in posterior annulus for anchoring the 6 mm width vascular graft strip, symmetric (n=8) or asymmetric (n=14) annuloplasty were done. Combined surgeries were CABG (n=21), Dor procedures (n=3), tricuspid valve annuloplasty (n=1), Maze operation (n=1), and aorto-right subclavian artery bypass (n=1). Result: Except for one surgical mortality, all the patients were doing well and the mean grade of regurgitation was decreased from 2.95 to 0.88, however the ejection fraction had not changed significantly just before discharge. Post-operative valve function evaluated before discharge revealed no residual regurgitation in 8 (including 1 patient with mild stenosis due to over reduction), minimal in 11, mild in 2, and mild to moderate regurgitation in 1. One patient who had ischemic cardiomyopathy and renal failure died of the arrhythmia during the hemodialysis. Conclusion: These observations suggest that the annuloplasty with vascular graft strip could be a safe and cost effective techniques for ischemic mitral regurgitation. However, the long term evaluation for the mitral valve function should be defined for the final conclusion.

The Change of Peripheral Eosinophil Count after Bronchial Provocation with Inhaled Histamine in Bronchial Asthmatics (기관지 천식 환자에서 히스타민 기관지유발검사후 말초혈액 호산구수의 변화)

  • Kim, Chi-Hong;Kim, Young-Kyoon;Kwon, Soon-Seog;Kim, Kwan-Hyoung;Han, Ki-Don;Moon, Hwa-Sik;Song, Jeong-Sup;Park, Sung-Hak
    • Tuberculosis and Respiratory Diseases
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    • v.39 no.5
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    • pp.386-391
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    • 1992
  • Background: Recently, bronchial provocation of the airway of atopic asthmatic subjects with inhaled allergen has been shown to produce an initial peripheral blood eosinopenia followed by an eosinophilia occurring approximately 12 to 18 hrs after the challenge. However there are few studies about the change of peripheral eosinophil count (PEC) after bronchial provocation with nonspecific stimuli such as histamine or methacholine. Interestingly our preliminary study demonstrated a notable change of PEC during bronhial provocation with inhaled histamine in some asthmatic subjects. This study was designed to reevaluate our preliminary data and to further investigate the change of PEC during as well as after bronchial provocation with inhaled histamine in bronchial asthma tics. Methods: Sixteen asthmatic subjects participated in this study. Bronchial provocation with inhaled histamine was done between 9 AM and 12 MD. Blood samplings for PEC were done with 5 minutes intervals during the procedure, and repeated at 1 hour, 2 hours, 4 hours, 8 hours, 24 hours, and 48 hours after the procedure. Results: The results were as follows; 1) The patients were divided into two groups characterized by each pattern in the change of PEC during the procedure. A group (11 of sixten, group I) showed an increasing pattern of PEC and another group (5 of sixteen, group II) showed a decreasing pattern of PEC during the procedure. 2) Group I demonstrated a tendency to maintain continuously higher level of PEC than the baseline value until 48 hours after the procedure. 3) Group II demonstrated a tendency to maintain continuously lower level of PEC than the baseline value until 48 hours after the procedure. 4) There were no significant differences in their clinical parameters including baseline eosinophil count, baseline $FEV_1$, $PC_{20}$ of histamine, and serum IgE level between group I and group II. Conclusion: Our results suggest that the change of PEC produced by inhaled histamine in asthmatic subjects is much different from that produced by inhaled allergen, and that each patient may have their individual characteristics in the change of PEC in response to bronchial provocation with inhaled histamine. Alternatively these findings suggest that eosinophils may be partially involved in the early asthmatic reaction.

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Effect of Blue and Yellow Polyethylene Shading Net on Growth Characteristics and Ginsenoside Contents in Panax ginseng C. A. Meyer (청색과 황색 해가림이 인삼의 생육 및 진세노사이드 함량에 미치는 영향)

  • Kim, Geum-soog;Lee, Min-Jung;Hyun, Dong-Yun;Park, Chun-Geun;Park, Ho-Ki;Cha, Seon-Woo;Lee, Sung-Woo
    • Korean Journal of Medicinal Crop Science
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    • v.15 no.3
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    • pp.194-198
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    • 2007
  • Yield and ginsenoside contents of ginseng (Panax ginseng C. A. Meyer) is affected by light intensity and quality, and the color and the thickness of PE shading net when PE net is utilized for shading material. This study was carried out to investigate the effect of light quality on root yield and ginsenoside contents off-year-old ginseng by using polyethylene shading net with each blue and yellow color, Spectral irradiance under blue and yellow shading net showed the peak at 498 nm and 606 nm, respectively, which made distinct difference in light quality. Heat injury ratio of blue shading net was increased distinctly more than that of yellow shading net in summer season because of higher transmitted quantum (23%)and air temperature (0.3 $^{\circ}$C) in blue shading net than those of yellow shading net. Chlorophyll content and leaf area under yellow shading net were higher than those of blue shading net, and its heat injury ratio was lower than those of blue. These effects may led to 48% higher increase of root yield under yellow shading net than that under blue shading net. The content of total ginsenoside in taproot was not significantly differed between blue and yellow shading net, while the content in lateral and fine root was significantly increased in blue shading net compared to yellow shading net. PDM ratio of blue shading net showed more significant increase in lateral root than that of yellow shading net. All of Rb$_1$/Rg$_1$ ratio in three parts of root under blue shading net was higher than that of yellow shading net, but there were no significant increase in the ratio of lateral root.

Effect of Phosphate Bio fertilizer Produced by Enterobacter intermedium on Rhizosphere Soil Properties and Lettuce Growth (Enterobacter intermedium으로 제조된 인산생물비료가 토양 특성 및 상추의 생육에 미치는 영향)

  • Park, Bum-Ki;Na, Jung-Heang;Hwang-Bo, Hoon;Lee, In-Jung;Kim, Kil-Yong;Kim, Yong-Woong
    • Korean Journal of Soil Science and Fertilizer
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    • v.38 no.1
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    • pp.15-24
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    • 2005
  • Enterobacter intermedium oxidizes glucose to gluconic acid and sequentially converts gluconic acid to 2-ketogluconic acid (2-KGA) under aerobic condition. Shaking incubation of E. intermedium in a broth medium containing 22.5 g glucose, 8.2 g gluconic acid and 40 g rock phosphate per liter resulted in $1028mg\;L^{-1}$ soluble phosphate. The culture broth was used as phosphate bio-fertilizer (PBF) in this experiment. To evaluate PBF produced by E. intermedium on lettuce growth, five treatments (PBF1/3, PBF2/3, PBF3/3, BP, and MF) were used. In MF and BP treatments, $P_2O_5$ 5.9 kg of mineral fertilizer per 10a was added, while in PBF1/3, PBF2/3, and PBF3/3 treatments, culture broth containing one third, two third, and same amount of soluble $P_2O_5$ 5.9 kg per 10a was applied, respectively. At 20, 35, and 50 days after transplanting of lettuce, plant growth components, biomass, enzyme activities and soil chemical properties were analyzed. Dehydrogenase activity and available phosphate concentration of rhizosphere in phosphate bio fertilizer treatments (PBF1/3, PBF2/3, PBF3/3) were generally higher compared to MF and BP treatments. Soil biomass in PBF3/3 treatment was significantly higher than MF and BP treatments at early growth stage. However, there was no significant difference among all treatments with time. Plant fresh weights in PBF1/3, PBF2/3, and MF treatments were better than those in BP and PBF3/3 treatments. However, in PBF2/3 treatment the highest fresh weight was discovered where alkaline phosphatase activity was generally higher than other treatments at 35 and 50 days. Enhancement of lettuce growth at 35 and 50 days in PBF2/3 treatment was associated with greater phosphate uptake in lettuce tissue. As regarding all results, PBF showed better lettuce growth compared to mineral phosphate fertilizer where PBF2/3 treatment resulted in increase of lettuce fresh weight by 23% and phosphate uptake by 50%.