Khadijeh Shahsavarpour Lendeh; Hemmatollah Pirdashti; Esmaeil Bakhshandeh
Abstract
In order to investigate the effect of a native plant growth promoting bacteria (Enterobacter sp.) on some vegetative characteristics and paddy yield of rice(cv. ‘Tarom Hashemi’), a field experiment was carried out in Babol (Aghamalek village) at 2016. This experiment was arranged in split ...
Read More
In order to investigate the effect of a native plant growth promoting bacteria (Enterobacter sp.) on some vegetative characteristics and paddy yield of rice(cv. ‘Tarom Hashemi’), a field experiment was carried out in Babol (Aghamalek village) at 2016. This experiment was arranged in split plots based on a randomized complete block design with three replications. Six levels of potassium sulfate fertilizer (PSF: 0, 25, 50, 75, 100 and 125 kg ha-1) were used as the main plots and four levels of inoculations (non-inoculation as control, seed inoculation in the seedbed condition, seedling root inoculation before transplanting time and combined both previously methods) served as the sub-plots. The results indicated that various methods of inoculation increased plant height (1.25-2.54%), tillers number per hill (TNH; 11.7-16.5%), total leaves number per hill (TLN; 12.5-14.2%), leaf area index (LAI; 7.16-17.9%) and paddy yield (PY; 14.6-19.8%) of rice and the occurring of anthesis stage were about one day sooner as compared to the control condition. In this experiment, the studied traits significantly influenced by PSF and various methods of inoculation, but the interaction effect between them were not significant. Among inoculation methods, the combined method was better than others. In addition, the values of all studied traits such as PH, TNH, TLN, LAI and PY (18.2% more than the control) increased as PSF increased from zero to 125 kg ha-1. Consequently, the application of Enterobacter sp. and PSF through improved the vegetative characteristics, particularly in LAI, TNH and TLN, resulted to increase in the radiation interception capacity, photosynthetic efficiency and improved PY of rice.
Shahriar Kazemi; Esfandiar Farahmand; Hemmatollah Pirdashti; Mojtaba Mahmoudi
Abstract
In order to evaluate the effects of mycorrhiza-like fungi, Piriformospora indica, and mycorrhiza fungi, Glomus mosseae, symbiosys on corn (Zea mays L. cv. SC 704) grain yield and water use efficiency under different limited irrigation regimes and phosphorus, a field experiment was conducted as split ...
Read More
In order to evaluate the effects of mycorrhiza-like fungi, Piriformospora indica, and mycorrhiza fungi, Glomus mosseae, symbiosys on corn (Zea mays L. cv. SC 704) grain yield and water use efficiency under different limited irrigation regimes and phosphorus, a field experiment was conducted as split factorial based on a randomized complete block design at two stations of Gharakhil and Bayekola during growing season of 2015. Treatments were different irrigations at three levels (100, 75 and 50% ofcrop water requirement) in main plots, four levels of inoculation (control, Pi inoculation, Gm inoculation and Pi + Gm inoculation) and three levels of phosphorus (control, 50 and 100 % of crop requirement) in sub plots as factorial. According to the results, simultaneous inoculation of Pi and Gm induced significant increase in grain yield in both regions (8.6 and 6.3 % for Gharakhil and Bayekola stations, respectively). In both regions, symbiotic fungi incolationimprovement of productivity of water use obtained when Pi and Gm were inoculated (especially simultaneous inoculation), in all irrigation treatments. The most of the positive effects of coexistence were observed in both area under irrigation 50% (4.33 and 4.15 Kg/ha, respectively). Overall, the inocolation, results represented a synergistic effect of two applied fungi for ameliorating the corn water use efficiency, especially under limited irrigations.
Raouf Seyed sharif
Abstract
To study the effects of nano-zinc oxide and seed inoculation with brady rhizobium and plant growth promoting rhizobacteria on yield and some agronomic traits of soybean, a factorial experiment based on randomized complete block design with three replications was conducted in 2013 at the research farm ...
Read More
To study the effects of nano-zinc oxide and seed inoculation with brady rhizobium and plant growth promoting rhizobacteria on yield and some agronomic traits of soybean, a factorial experiment based on randomized complete block design with three replications was conducted in 2013 at the research farm of the Islamic Azad University, Ardabil Branch. Treatments were foliar application of nano-zinc oxide at four levels (zero, 0.3, 0.6 and 0.9 gr/litr) and seed inoculation with brady rhizobium and plant growth promoting rhizobacteria at five levels (without inoculation as control, seed inoculation with brady Rhizobium japanicum, seed inoculation with brady rhizobium R. japanicum + Azosprillum lipoferum strain OF, seed inoculation with brady Rhizobium japanicum + Psedomonas putida strain 41, seed inoculation with brady Rhizobium japanicum + Azosprillum lipoferum + Psedomonas putida. The results showed that maximum of plant height, grain 100 weights, the number of nodules per plant and grain yield, total dry matter (530 gr/m2), crop growth rate (9.48 gr/m2.day) and relative growth rate (0.1 gr/gr.day) were obtained at foliar application of 0.9 gr/litr nano-zinc oxide + seed inoculation with rhizobium + Azosprillum + Psedomonas and the least of these indices were obtained at without foliar application of nano-zinc oxide + seed inoculation. It seems that using 0.9 gr/lit of nano-zinc oxide × seed inoculation with rhizobium and PGPR could increase the grain yield and some agronomic traits of soybean and can be recommended to the growers.
Vahideh Khalegh nejhad; farhad jabbari
Abstract
This experiment was carried out to evaluate the effect of Rhizobium strains and plant growth promoting Rhizobacteria(PGPR) on yield and yield components of chickpea (Cicer arientinum L.) Arman cultivar. This research was conducted as split plot based on randomized complete block design at Zanjan university ...
Read More
This experiment was carried out to evaluate the effect of Rhizobium strains and plant growth promoting Rhizobacteria(PGPR) on yield and yield components of chickpea (Cicer arientinum L.) Arman cultivar. This research was conducted as split plot based on randomized complete block design at Zanjan university researchal farm. Irrigation levels(optimum irrigation during season growth and no irrigation during growth period) were set as main plots and fertilizer level(control or no application chemical and biological fertilizer, 50kg/ha Urea, seed inoculation with Mesorhizobium ciceri strain of SWRI-3,seed inoculation with Mesorhizobium ciceri strain SWRI-17, seed inoculation with PGPR,Co-inoculation with rhizobium strains SWRI-3+SWRI-17 and Co-inoculation with all biofertilizer , PGPR+SWRI-3+SWRI-17) were sets as subplots. The results of this study showed that drought stress reduced plant height, number of branches, number of seeds per plant, seed weight, biological yield and harvest index.Applicatin of biofertilizers because of positive effects on plant height, number of seeds per plant, seed weight, pod weight per plant and biological yield,produced more grain yield in comparison control and nitrogen urea fertilizer in both of arrigated and rainfed conditions.In addition ,seed co-inoculation with all of bio-fertilizers(PGPR+SWRI-3+SWRI-17) achieved more grain yield in comparison separate inoculation about 18-36% in irrigated and 34-50% in rainfed conditions.
Ali Khosravi; Raouf Seyed Sharifi; Aliakbar Imani
Abstract
In order to study of nitrogen application time and seed inoculation with plant growth promotingrhizobacteria on yield, fertilizer use efficiency and grain filling rate of sunflower, a factorial experimentwas conducted based on randomized complete block design with three replications in research farm ...
Read More
In order to study of nitrogen application time and seed inoculation with plant growth promotingrhizobacteria on yield, fertilizer use efficiency and grain filling rate of sunflower, a factorial experimentwas conducted based on randomized complete block design with three replications in research farm ofIslamic Azad University, Ardabil branch in 2011. The first factor was time of nitrogen application inthree levels, (1/3 at 4-6 leaf stage, 1/3 at budding stage, 1/3 at flowering stage), (1/2 at 4-6 leaf stage, 1/2at budding stage), (1/4 at 4-6 leaf stage, 1/2 at budding stage, 1/4 at flowering stage) as N1, N2 and N3respectively and the second factor was seed inoculation with plant growth promoting rhizobacteria in fourlevels containing (without inoculation as control, seed inoculation with Azotobacter chrocococum strain5, Psedomunas putida strain 9, Psedomunas putida strain 41). The results showed that maximum of grainweight, grain filling period, grain and biological yield, 1000 grain weight, number of grain per head, plantheight, head and stem diameter were obtained in nitrogen application as N2×seed inoculation withAzotobacter. Maximum of nitrogen use efficiency was recorded at nitrogen application as N2×seedinoculation with Azotobacter and minimum of it was obtained in nitrogen application as N1× no seedinoculation. It seems that in order to increasing of grain yield, fertilizer use efficiency and grain fillingrate, can be suggested that should be applied nitrogen application time as N2×seed inoculation withAzotobacter.