Ladan Ghorbani; Amin Salehi; Mohsen Movahhdi Dehnavi; Hamidreza Balouchi; Parvin Rostampour
Abstract
Objective: The effects of mycorrhizal and Plant-growth promoting rhizobacteria on some characteristics of milk thistle in different irrigation regimes was investigated.Methods: The experiment was conducted as a factorial based on completely randomized design in 3 replications at the research greenhouse ...
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Objective: The effects of mycorrhizal and Plant-growth promoting rhizobacteria on some characteristics of milk thistle in different irrigation regimes was investigated.Methods: The experiment was conducted as a factorial based on completely randomized design in 3 replications at the research greenhouse of Yasouj University in 2014-2015. The first factor included drought stress at 3 levels (irrigation after 20, 50 and 80% soil moisture depletion), and the second factor was biological fertilizer at 4 levels (control, mycorrhizal (Funneliformis moseae), bacteria (Bacillus subtilis) and mycorrhizal+bacillus.Results: The effect of irrigation regime and biofertilizer was significant on all traits, but the interaction of the factors was only significant on soluble sugar. The highest amount of nitrogen (23.58 mg.g-1), phosphorus (22.76 mg.g-1), protein (50.69 mg.g-1 leaf fresh weight), relative moisture content (70.20 %) and shoot dry weight (19.78 g) was obtained from irrigation after 20% moisture depletion from the soil and the highest amount of potassium (10.08 mg.g-1), proline (9.79 mg.g-1 leaf fresh weight) was obtained from irrigation after 80% moisture depletion. Among the fertilizer regimens, the highest amount of these traits, especially the shoot dry weight (21.71g), was obtained from the combination of mycorrhizal and bacterial biofertilizers. The highest amount of soluble sugar in stress levels was obtained from the integrated treatment of biofertilizers.Conclusion: Increase in the ability of milk thistle to absorb water and soil nutrients using biological fertilizers, and the effect of these nutrients in increasing the photosynthetic capacity and improving growth, has helped this plant to tolerate drought conditions.
Hamed heydari; Amin Salehi
Abstract
In order to evaluate the effects of vermicompost organic fertilizers on root weight, stem weight, root length, stem length, content of photosynthetic pigments and element uptake of nitrogen, phosphorus and potassium of different ecotype’s of Stachys pilifera L., a factorial based on a completely ...
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In order to evaluate the effects of vermicompost organic fertilizers on root weight, stem weight, root length, stem length, content of photosynthetic pigments and element uptake of nitrogen, phosphorus and potassium of different ecotype’s of Stachys pilifera L., a factorial based on a completely randomized design with three replications was conducted at the research greenhouse, Faculty of Agriculture, Yasouj University, during 2012. Factors were vermicompost at four levels (0, 5, 10 and 15 weight percent) and ecotype at four levels (Margoon, Loudab, Abnahr and Sepidar). The results showed that Loudab and Margoon ecotype’s had the maximum nitrogen, phosphorus, potassium and chlorophyll b contents and Sepidar and Abnahr ecotype’s plants had the minimum of them. In a greenhouse experiment, 15 and 0 percent vermicompost had the maximum and minimum levels of nitrogen, phosphorus, potassium and chlorophyll b, respectively, as application of vermicompost by 15 percent in the above mentioned traits increased 71/43, 61/24, 33/33 and 75% compared to control, respectively. The maximum and minimum of total chlorophyll, chlorophyll-a and carotenoid contents were obtained at Loudab and Sepidar ecotype’s with 15 and 0 percent of vermicompost, respectively. In general, the results of this study showed that Ecotypes of the habitats of the lower regions better adapt to greenhouse conditions. Result Also, indicated that application of vermicompost in level of 15 percent had a significant role in improving the morphophysiological characteristics of Stachys pilifera L. and can be used as a suitable planting bed for this plant.