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Showing 4 results for Azospirillum
Tooraj Khoshbakht, Farzane Bahadori, Ahmad Khalighi, Mohamad Moez Ardalan,
Volume 2, Issue 8 (3-2011)
Abstract
The effect of bacteria(Azospirillum lipoferum and Pseudomonas putida) were examined in a green house pot experiment with Aloe vera. The present study was carried out in the complete randomized block design with 4 treatments and 3 replications. The treatments included(1-control plants2-inoculation with Azospirillum lipoferum 3-inoculation with Pseudomonas putida and4- inoculation with mixture of microorganisms). The statistical analysis showed the Plant growth promoting rhizobacterias (PGPR) that tested in this experiment had significant effect on increasing growth parameters such as roots and leaves fresh and dry weight ,number and length of leaves and roots ,leaf area as well as the content of the P and K uptake in Aloe vera . High significant difference was observed in inoculation of Pseudomonas putida. This treatment significantly increased yield about 42.4% compared with control plants. The results obtained in the present work mainly show the potential of PGPR in production of Aloe vera.
N. Moslehi, Y. Niknejad, H. Fallah Amoli, N. Kheyri,
Volume 8, Issue 30 (9-2016)
Abstract
In order to investigate the effect of integrated application of chemical, organic and biological fertilizers on some of the morphophysiological traits of rice Tarom Hashemi cultivar, the present experiment was conducted in a randomized complete blocks design with 8 treatments and three replications at a research field of Amol in 2013-14. Treatments of the experiment consisted of: T1: Control or no fertilizer application, T2: nitrogen fertilizer application, T3: manure fertilizer application, T4: Azospirillum bacteria application, T5: manure fertilizer + Azospirillum, T6: nitrogen fertilizer + manure fertilizer, T7: nitrogen fertilizer + Azospirillum bacteria and T8: nitrogen fertilizer + manure fertilizer+ Azospirillum bacteria. Results indicated that experimental treatments had a significant effect on all under studied traits. Treatment of T7, had the highest plant height and the most filled grain number per panicle. Treatments of T6 and T7 had the most panicle number per plant. The lowest sterile floret number per panicle was observed in treatments of T7 and T8. Among treatments, treatment of T5 allocated the most one-thousand grain weight (25.97 gram) and harvest index (65.30 percent). The highest panicle length was belonged to treatments of T4, T5 and T6. The highest biological yield (7812 kilogram per hectare) and nitrogen of straw (15.67 kilogram per hectare) was observed in T6 treatment. The highest amount of grain yield and nitrogen storage in grain with averages of 4298 and 58.34 kilogram per hectare was belonged to T8 treatment, respectively.
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Volume 10, Issue 38 (9-2018)
Abstract
Soil fertilization plays an important role in absorbing nutrients by plant, which is the most important factor in soil fertility, increasing soil organic matter. In this regard, a factorial experiment was conducted in a randomized complete blocks design with three replications in the area around the city of Someh-Sara. Experimental factors included vermicompost consumption levels (without fertilizers 5 and 10 tons per hectare) and the use of plant growth promoting bacteria (non-inoculation, Azotobacter and Azospirilum) for seed inoculation. The results showed that the interaction of vermicompost and bacteria on the amount of leaf chlorophyll, number of tillers, plant length, number of full grain per spike, biological yield and rice yield were significant at one percent probability level. The maximum rice yield was obtained from treatment of 10 tons per hectare of vermicompost + azosporillum with an average of 7096 kilogram per hectare; which was increased by 31.28 percent compared to control treatment and by the amount of 27.47 percent of 10 tons per hectare vermicompost application + non-inoculation treatment. Also, the maximum concentration of phosphorus and potassium grain was obtained from treatment of 10 tons per hectare of vermicompost + azosperplum, while the highest grain nitrogen concentration was observed from treatment with 5 tons per hectare of vermicompost + azotobacter. Therefore, according to the results obtained for the maximum yield of rice, application of 10 ton per hectare vermicompost is recommended with seed inoculation with Azospyrilum.
Hadi Jahanshahi, Hossein Ajamnorozi, Mohamdreza Dadashi, Mohamad Bagher Rezaei, Hedieh Mosanaiey,
Volume 13, Issue 52 (3-2022)
Abstract
In order to evaluate the effect of chemical and biological fertilizers on crop and physiological characteristics of wheat, pearl cultivar was applied in experimental form in the form of complete randomized randomized blocks with three replications in Nokandeh city of Golestan province. Experimental factors include nitrogen supply sources at four levels of nitrogen (12 g/100 kg seed), Azospirillum (12 g/100 kg seed), urea (200 kg/ ha-1) and an equal combination of three sources (33% Azotobacter + 33% Azospirillum + 33% urea) and phosphorus-supplying sources at the level of three levels of triple superphosphate (100 kg / ha), fertile phosphate 2 (12g/100 kg seed) and equal combination of two sources (50% triple superphosphate + 50% fertile phosphate 2)) Was with the control. The results of analysis of variance showed that nitrogen and biological fertilizers had a significant effect on all traits except the weight of one thousand seeds at the level of one percent probability. The results showed that the highest plant height, biological yield, spike length, number of seeds per spike, grain yield, flowering and care protein, chlorophyll b and total fertilizer treatment combined the three sources of nitrogen supply (33% Azotobacter + 33% of Azospirillum + 33% Urea). High levels of leaf area index, spike and chlorophyll a were obtained with Azotobacter treatment. In summary, the results of this study showed that using the right combination of biofertilizers and nitrogen fertilizers can reduce the use of chemical fertilizers and therefore be consistent with agricultural goals.
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