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Showing 2 results for Bio-Fertilizer.
Effect of mycorrhizal inoculation and phosphorus fertilizer on fenugreek resistance against arsenic
M. R. Asgharipour, M. Bijani,
Volume 7, Issue 2 (8-2016)
Abstract 
The aim of this study was to evaluate the effects of mycorrhizal inoculation and phosphorus (P) application on arsenic (As) toxicity and absorption by fenugreek, after application of As to soil. In this greenhouse experiment, plants inoculated with three mycorrhizal species and grown in soils with different levels of applied P and As, were compared. Phytotoxicity of As was determined by studying plant growth, As accumulation, as well as uptake of macronutrients and concentration of photosynthetic pigments. Based on the results, addition of As significantly reduced plant growth, uptake of macronutrients and concentration of photosynthetic pigments. Most of the absorbed As was retained in roots and fenugreek roots had higher concentration of As than the shoots. In addition, P and mycorrhiza had a significant impact on all traits, except sodium concentration. In this study, the interaction between As vs. P as well as between As vs. mycorrhiza was significant on concentration of carotenoids, potassium and arsenic in shoots. P and mycorrhiza had a moderating role and decreased the negative effects of arsenic toxicity on these properties. Results of this experiment revealed that application of P fertilizer and mycorrhizal inoculation in fenugreek could be effective in reducing the negative effects of As stress by increasing the uptake of nutrients and concentration of photosynthetic pigments.

The effect of soil fertilization and foliar spray of semperflorens begonia (Begonia semperflorens) by Spirulina cyanobacterium biomass
Dr. Abolfazl Jowkar, Kazem Bashiri, Dr. Mohammad Taghi Golmakani,
Volume 8, Issue 3 (12-2017)
Abstract
Semperflorens begonia (Begonia semperflorens) is an ornamental house-plant which for its optimal growth and development needs a proper nutrition. Currently, cyanobacteria are sought after by plant growers as a growth bio-stimulant. Spirulina (Spirulina platensis) is an important cyanobacterium which has a vast range of nutritional organic and inorganic substances. This green-blue algae could be a new option of bio-fertilizers for organic cultivation of plants, which merits further investigations in different plants. In this regard, a research with a completely randomized design and five replications was carried out in the greenhouse of the Department of Horticultural Science at Shiraz University, to increase the quality and yield of semperflorens begonia. Spirulina treatments were studied in two forms of soil fertilization and foliar spray (concentrations of 0, 500, 1000, 2000 and 4000 mg/L). Results showed that soil fertilization has greater effect on morphophysiological traits of begonia than foliar spray. Soil fertilization with 4000 mg/L spirulina was the best treatment and compared to the control, significantly increased the vegetative growth, phosphorus, potassium and chlorophyll content of leaves and visual quality of semperflorens begonia. Also, in the abovementioned treatment, the sugar content of leaves, petals’ anthocyanin content and number of flowers were 3, 2 and 2 times higher than control treatment.

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