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101.
Ruiz-Larrañaga Otsanda Asadollahpour Nanaei Hojjat Montes Iratxe Ayatollahi Mehrgardi Ahmad Abdolmohammadi Alireza Kharrati-Koopaee Hamed Sohrabi Saeed S. Rendo Fernando Manzano Carmen Estonba Andone Iriondo Mikel Esmailizadeh Ali 《Tropical animal health and production》2020,52(5):2283-2290
Tropical Animal Health and Production - Genetic structure and genetic diversity levels of indigenous Iranian sheep breeds are not clear, despite the interest this region has in itself as an... 相似文献
102.
Jula GM Sattari M Banihashemi R Razzaz H Sanchouli A Tadayon K 《Tropical animal health and production》2011,43(3):699-704
To understand epidemiology of Bacillus anthracis in Iran, the morphological, biochemical, and virulence specifications of 32 B. anthracis isolates, collected from human, sheep, cattle, goat, and environmental specimens obtained from throughout Iran were examined
by conventional and molecular approaches. B. anthracis isolates were characterized in multiple ways: (1) capsule formation both on bicarbonate agar and in defibrinated horse blood,
(2) motility of vegetative forms, (3) hemolysis on 5% sheep blood agar, (4) penicillin G susceptibility, (5) lecithinase production
on egg yolk agar, (6) gelatin hydrolysis, (7) ability to develop “string of pearls” on tryptose agar, and (8) capability to
develop mucoid colonies in presence of CO2 were assessed. In addition, biochemical properties such as indole, methyl red, catalase, citrate utilization, and finally
nitrate reduction tests were used. All the tested isolates produced identical morphological and biochemical patterns with
those of the vaccine strain B. anthracis 34F2 Sterne. In order to assess potential virulence of isolates at genomic level, PCR protocols assaying for the pXO1 and
pXO2 loci were employed. The intriguing high level of phenotypic similarity between Iranian isolates of B. anthracis and the 34F2 Sterne strain deserves further studies at genomic level. 相似文献
103.
Rafia S Taghipour-Bazargani T Asadi F Vajhi A Bokaie S 《Veterinary research communications》2011,35(8):531-540
The objective of present study was to record the sequential alterations in liver echo-texture through digital analyzing of
the B-mode ultrasonography in three groups of under-conditioned (UC), moderate-conditioned (MC), and over-conditioned (OC)
clinically healthy Holstein cows from 30 days to calving until 30 days in milk. Furthermore, to compare their changes in association
with the changes of fat mobilization parameters of non-esterified fatty acids (NEFA), betahydroxybutyric acid (BHBA), and
body condition score (BCS). Although the cows lost significant (P < 0.05) BCS from calving and the NEFA values showed an increasing trend near calving and the BHBA values significantly inclined
postparturition, the mean grey scale histogram (MGSH) of liver images did not reveal significant fluctuations unless a significant
decrease on calving day (P < 0.05). The MGSH drop was predicted to be the result of anatomical changes in abdominal cavity, related to delivery and
liver’s blood flow. OC cows had higher NEFA on day +20 than UC and MC cows (P < 0.05). UC cows showed higher MGSH values on day −30 than MC cows and again on day −10 comparing to MC and OC cows (P < 0.05). MGSH values correlated with BCS values (r
UC = −0.186; r
MC = −0.283; r
OC = −0.158). It was concluded that the studied cows did not show significant alterations in textural changes in their liver
ultrasound whilst going through fat mobilization. As quantitative ultrasonography has shown the potential to detect cases
of fatty liver, it could gain the attention to become a feasible device for liver health monitoring on a herd basis. 相似文献
104.
Kambiz Abrari Vajari Hamid Jalilvand Mohammad Reza Pourmajidian Kambiz Espahbodi Alireza Moshki 《林业研究》2011,22(4):591-596
A case study was conducted in beech forests of northern Iran to determine the effect of the created gaps on some soil properties in beech stand. Changes of soil properties in small (60 150 m 2 ), medium (151 241 m 2 ), large (242 332 m 2 ) and very large (333 550 m 2 ) gaps, as well as under closed stands were studied eight years after the gap creation. Soil samples were taken from three depths, 0 10, 10 20 and 20 30 cm. The gaps were different from their around undisturbed stands in terms of the following soil parameters: Mg +2 concentration of 0 10 cm at medium gap size, bulk density of 10 20 cm at very large gap size as well as K + and Ca +2 concentrations at 20 30 cm at small and large gap sizes, respectively. Furthermore, the size of the gaps had no effect on soil characteristics through the whole profile. Water saturation percent (Sp %) at 0 10cm as well as P and Mg +2 at 20 30 cm was different amongst undisturbed stands around different gap sizes. The center and the edges of the gap were different only in terms of organic carbon at the depth of 10 20 cm. Significant differences were observed between gaps andclosed canopy regarding P and Ca +2 at depth 0 10 cm and 10 20 cm, respectively. It can be concluded that applied silvicultural system for harvesting trees which created these gaps might be suitable for conservation and forest management in the region. 相似文献
105.
We conducted a greenhouse experiment to investigate the role of seed source in growth and symbiotic nitrogen fixation of black locust (Robinia pseudoacacia L). Seeds from different sources were planted in the same environmental conditions and inoculated with a suspension of mixed Rhizobium. We used the modified 15 N isotope dilution method to estimate biological nitrogen fixation of Robinia trees. Different Robinia seed sources differed significantly in terms of tissue dry weight (50.6 80.1 g), total N (1.31-2.16 g) and proportion of nitrogen derived from the atmosphere ( 0-51%). A higher nitrogen fixation rate of Robinia trees was associated with higher dry weight. Moreover, the leaves of Robinia proved to adequately represent the nitrogen fixation capacity of entire plants. Our results confirmed that assessment of seed sources is a useful way to improve the nitrogen fixation capacity and therefore the growth rate of Robinia. 相似文献
106.
Rajbhandari R Peng N Moore R Arabshahi A Wyss JM Barnes S Prasain JK 《Journal of agricultural and food chemistry》2011,59(12):6682-6688
The glycosides of flavonoid, anthocyanins and A type proanthocyanidins in cranberry concentrate were characterized and quantified using liquid chromatography-tandem mass spectrometry (LC-MS/MS). Cranberry concentrate (1 g/body weight) was orally gavaged to Fischer-344 rats (n = 6), and blood and urine samples were collected over 24 h periods. Quercetin, 3'-O-methylquercetin (isorhamnetin), myricetin, kaempferol, and proanthocyanidin dimer A2, together with thirteen conjugated metabolites of quercetin and methylquercetin and intact peonidin 3-O-galactoside and cyanidin 3-O-galactoside were identified in the rat urine after cranberry treatment. Very low levels of isorhamnetin (0.48 ± 0.09 ng/mL) and proanthocyanidin dimer A2 (0.541 ± 0.10 ng/mL) were found in plasma samples after 1 h of cranberry administration. Although no quercetin was detected in plasma, MRM analysis of the methanolic extract of urinary bladder showed that chronic administration of cranberry concentrate to rats resulted in accumulation of quercetin and isorhamnetin in the bladder. These results demonstrate that cranberry components undergo rapid metabolism and elimination into the urine of rats and are present in the urinary bladder tissue potentially allowing them to inhibit urinary bladder carcinogenesis. 相似文献
107.
Mehrdad Shahabian Seyed Mahmood Samar Alireza Talaie Mohammad Reza Emdad 《Archives of Agronomy and Soil Science》2013,59(3):267-276
This work examines the effects of two deficit irrigation strategies, conventional deficit irrigation (DI) and partial root-zone drying (PRD), on mature navel orange trees. The study carried out during two consecutive years (2008 and 2009) in a semi-arid climate on a silty–clay–loam soil in the north of Iran. Both DI and PRD trees were irrigated at two levels, 75 and 50% (DI75, PRD75, DI50 and PRD50) of the full irrigation (FI). In DI, irrigation water was applied to both sides of the tree rows, similar to FI. In PRD, irrigation water was applied alternately to only one side, at each irrigation event. Results showed that DI treatments reduced fruit yield by ～30% compared with FI, but PRD treatments caused no reduction in fruit yield. No negative impact was detected in fruit quality after applying DI and PRD treatments. Shoot growth decreased in all DI and PRD treatments in both years. In DI, stomatal resistance was higher (50%) than in FI, but it was not significantly affected in PRD. The irrigation water use efficiency of PRD trees increased to nearly twice that of FI. According to these two years' results, we recommend PRD as an acceptable deficit irrigation strategy in the region. 相似文献
108.
Alireza Shiri Harzevili Inge Dooremont Inne Vught Johan Auwerx Paul Quataert & Daniel De Charleroy 《Aquaculture Research》2004,35(1):49-55
The burbot (Lota lota) is the only fresh water member of the cod family, Gadidae, and is adapted to cold waters. The effects of temperature and light on the growth and survival of burbot larvae were investigated under hatchery conditions. Three temperature regimes (12, 16 and 20°C) were applied under continuous light and darkness during the experiment. Rotifer, Brachionus calyciflorus (L.) were fed to the larvae in the first 10 days and the diet was then replaced with Artemia nauplii. At the end of the feeding stage with rotifer, growth in terms of the total length and wet weight were larger at higher temperatures under continuous light. At day 10, survival rates of the fish held at 12°C under continuous light and darkness regime were higher than those held at 16°C and 20°C kept under the same conditions. From day 10 onwards, larval growth improved remarkably after changing the live food from rotifer to Artemia in all treatments. At the end of the study, the highest survival rate was recorded among the larvae held at 12°C exposed to continuous light. Under light condition, the temperature of 20°C did not result in an improved larval growth compared with 16°C. This may indicate that high temperature and continuous light are not beneficial for larval growth and survival when they reach older stage of development. The results indicate a significant interaction for the combination of temperature, light and time with respect to survival and wet weight, making unambiguous interpretation of the main effects difficult. 相似文献
109.
Determination of soybean yield gap and potential production in Iran using modeling approach and GIS 
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下载免费PDF全文 Alireza NEHBANDANI Afshin SOLTANI Ali RAHEMI-KARIZAKI Amir DADRASI Faranak NOUBAKHSH 《农业科学学报》2021,20(2):395-407
Increasing crop production is necessary to maintain food security for the growing global population.Reducing the gap between actual and potential yield is one of the important ways to increase yield per unit area.Potential yield and the yield gap of soybean were determined for Golestan Province,Iran,using Soybean Simulation Model (SSM-i Crop2) and Geographical Information System (GIS).Information from 24 weather stations and soil data of the region were used.Yield gap and production gap were calculated at county and province levels.The average actual yield of soybean in this province was2.28 t ha~(–1) while the province’s potential yield was 4.73 t ha~(–1),so the yield gap was estimated 2.44 t ha~(–1).Thus,there is a great potential for increasing soybean yield in Golestan,which is possible through improving crop management of soybean in farmers’fields.The average water productivity of soybean was estimated to be 0.81 kg m~(–3).Spatial distribution of water productivity in soybean farms showed that the highest and the lowest water productivities (0.99 and 0.44 kg m~(–3)) were in western and eastern regions of the province,respectively,in accordance to vapour pressure deficit.It was concluded that soybean production in the province could increase by 66%(from 109 970 to 182 170 tons) if 80% of the current yield gap could be removed. 相似文献
110.
Yagoob Habibzadeh Mohammad Reza Zardashti Alireza Pirzad Omid Eini 《Journal of plant nutrition》2015,38(11):1754-1767
In this study we determined some morpho-physiological characteristics of mung bean plants under various irrigation regimes (irrigation after 50, 100, 150 and 200 mm evaporation from pan class A) and mycorrhizal fungi inoculation (Glomus mosseae, Glomus intraradices). The highest and lowest seed yield was obtained from plants irrigated after 50 and 200 mm evaporation from pan, respectively. Root dry weight, root volume, leaf phosphorus and relative water content were decreased in plants under water deficit stress. Whereas, under various level of severe water deficit the proline content, total soluble carbohydrates and leaf nitrogen were increased. Mycorrhizal colonization was observed to be higher in well-watered plants rather than in stressed plants. Furthermore, the mycorrhizal plants produced a higher seed yield (161 g/m2), leaf phosphorus, leaf nitrogen, chlorophyll index, proline, total soluble carbohydrates content, relative water content, root length, root volume, root dry weight and root/shoot weight ratio as compared with non-mycorrhizal plants. 相似文献