Plant Productions

Evaluation of the Interactive Effects of Nitrogen Sources and Sodium Bicarbonate on The Growth and Some Morpho-Physiological Characteristics of Garlic in Hydroponic System

Mahdiyeh Shojaei Khanisi; Hamid Reza Roosta; Mahmoudreza Roozban; Hamidreza Soufi

Volume 44, Issue 2 , August 2021, , Pages 221-234

https://doi.org/10.22055/ppd.2020.31011.1821

Abstract

AbstractIntroductionSoil salinity and alkalinity seriously affect about 932 million hectares of land globally, reducing productivity in about 100 million hectares in Asia. Plants in ... Read More AbstractIntroductionSoil salinity and alkalinity seriously affect about 932 million hectares of land globally, reducing productivity in about 100 million hectares in Asia. Plants in alkaline soil must cope with physiological drought and ion toxicity, and also maintain intracellular ion balance and regulate pH outside the roots. Alkaline stress result into decrease in chlorophyll concentration, stomatal conductance and transpiration rate and inhibite the growth of plant. Nitrogen sources affect the pH of nutrition solution, which can affect plant growth, so nitrate increases the pH of nutrient solution while ammonium decreases pH of nutrition solution. Materials and MethodsIn order to evaluate the effect of nitrogen sources on vegetative growth, physiological and chlorophyll fluorescence of white and purple garlic genotypes under sodium bicarbonate stress, an experiment was carried out as factorial base on completely randomize desigen with three factors; sodium bicarbonate at three levels (0, 10 and 20 mM), nitrogen sources (5 mM ammonium sulfate, ammonium nitrate and calcium nitrate in nutrient soulotion) and genotypes (white and purple) with three replications in 2017 in Greenhouse of Faculty of a Agriculture, University of Vali-e-asr Rafsanjan. Results and DiscussionThe results showed that shoot and root fresh and dry weight decreased by increasing sodium bicarbonate from 10 mM to 20 mM in nutrient solution and application of ammonium nitrate and ammonium sulfate sources decreased the negative effect of sodium bicarbonate on shoot and root fresh and dry weights. Among nitrogen sources, ammonium sulfate produced the highest soluble sugar content in both garlic genotypes. Proline content was enhanced by increasing sodium bicarbonate concentration in nutrient solution. The highest photosynthetic pigments were absorbed in plant that nourished by ammonium nitrate and ammonium sulfate, respectively. The sources of nitrogen, sodium bicarbonate and their interaction had no significant effect on chlorophyll fluorescence parameters, but genotype had significant effect on these traits. ConclusionAccording to the results of this experiment, the use of ammonium sulfate and ammonium nitrate sources has a better performance on growth and yield of garlic under bicarbonate stress conditions.

A comparison of various Substrates impact on yield and quality of Chrysanthemum ×morifolium cv. Puma in Hydroponic and Aquaponic systems

M. Alaei; H.R. Roosta; N. Mortazavi; H. Alaei

Volume 37, Issue 3 , December 2014, , Pages 115-127

Abstract

Abstract With expansion of hydroponic culture, demand for subsrate materials also has increased and necessity for more study to find the best substrate according to the plant characteristics ... Read More Abstract With expansion of hydroponic culture, demand for subsrate materials also has increased and necessity for more study to find the best substrate according to the plant characteristics seems to be necessary. For this purpose, a study was carried out on chrysanthemum cv puma using a factorial design with two factors, first a different substrate (cocopeat: perlite, 0:100, 25:75, 50:50, 75:25, 100:0) and second, a culture system (aquaponic and hydroponic) with compeletly randomized design and three replicates for 5 months. Results of ANOVA showed that the culture system and substrate form and their interaction has a significant (p<0.01) effect on chrysanthemum quantity and quality characteristics. According to the results of this study, in hydroponic system, vegetative growth characteristics of plants were higher compared to aquaponic. In substrate with 100% pelite, fresh and dry weight of roots and shoots were the lowest, whereas plants in 25% perlite+75% cocopeat had the highest fresh and dry weight of roots and shoots. Thus, the substrate ratio of 25% perlite+75% cocopeat was the best substrate for vegetative growth. There was a significant difference between hydroponic and aquaponic in reproductive characteristics of plants e.g., flower number per plant, flower number on one shoot, flower bud number, quality index and length of king flower. Plants in hydroponic system had the highest flower in the substrate ratio of 50% perlite+50%cocopeat, although this increment in flower number caused the reduction of flowers quality compared to other cocopeat contained substrates, whereas, in aquaponic system the highest flower number of plants was observed in 100% perlite substrate. Generally, plants in the substrate with mixture of cocopeat and perlite especially in the higher ratios of cocopeat had the best growth which is related to good physical characteristics of perlite and good physicochemical characteristics of cocopeat especially higher water and nutrient maintenance of cocopeat.

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Author = H.R. Roosta

Evaluation of the Interactive Effects of Nitrogen Sources and Sodium Bicarbonate on The Growth and Some Morpho-Physiological Characteristics of Garlic in Hydroponic System

Abstract

A comparison of various Substrates impact on yield and quality of Chrysanthemum ×morifolium cv. Puma in Hydroponic and Aquaponic systems

Abstract