Reza Taherdoost; Mahmood Dejam; Mehdi Madandoust; Farhad Mohajeri
Abstract
The use of sulfur (S) is of special interest in arid and semi-arid Iran since most soils are calcareous. In order to improve germination, seedling growth, and quality of Nigella sativa L. seeds obtained from mother plants grown under drought stress conditions, this investigation was performed in split ...
Read More
The use of sulfur (S) is of special interest in arid and semi-arid Iran since most soils are calcareous. In order to improve germination, seedling growth, and quality of Nigella sativa L. seeds obtained from mother plants grown under drought stress conditions, this investigation was performed in split plots with a completely randomized block design with three replications in research farm Fasa City in 2022. The main factor was irrigation after 25, 50 and 75 percent of soil moisture depletion and the subplots were fertilizer in 8 levels including 100 % S, 50% S + thiobacillus, 50% S + mycorrhiza, 50% S+ thiobacillus+ mycorrhiza, thiobacillus, mycorrhiza, thiobacillus+ mycorrhiza and control. The results showed that in irrigation with 75 percent soil moisture depletion, the integration of 50% S+ thiobacillus+ mycorrhiza decreased the seed membrane stability by 23 percent compared to the control. In an irrigation regime with 75 percent moisture depletion, the integration of 50% S+ thiobacillus+ mycorrhiza and 50% S+ mycorrhiza caused a 31 percent increase in amylase activity in seeds endosperm about control. The highest germination percent and rate are also observed in the integration of 50% S+ thiobacillus+ mycorrhiza. Moreover in the treatment with 75 percent soil moisture depletion, the 50% S+ thiobacillus+ mycorrhiza increased the seed vigor to 46 percent. With regards to the positive effects of sulfur integration with Thiobacillus and mycorrhiza in the improvement of the quality of seeds derived from black cumin under drought stress, the use of these biological compounds should be recommended.
Hamidreza Balouchi; Afsaneh Bekhradyani Nasab; Mohsen Movahhedi Dehnavi; Ali Sorooshzadeh
Abstract
Saffron is propagated exclusively by corm because of sterility. Therefore, choosing the suitable corm for cultivation is one of the important factors in saffron production and the final yield depends on the size of the corm. The research was conducted to investigate the effects of benzyl aminopurine ...
Read More
Saffron is propagated exclusively by corm because of sterility. Therefore, choosing the suitable corm for cultivation is one of the important factors in saffron production and the final yield depends on the size of the corm. The research was conducted to investigate the effects of benzyl aminopurine hormone priming, application of bio-fertilizers and maternal corm weight on the germination indices of saffron cormlets. Experimental treatments consisted of large (7.1-10 g) and small (4-7 g) corms, priming with benzyl aminopurine at concentrations of 0, 250, and 500 mg/l and biofertilizer levels (no fertilizer, Mycorrhiza (Funneliformis mossea) and fertilizer, Phosphate Barvar2). The results showed that maternal corms with 7.1 to 10 g compared to 4 to 7 g increased seedling emergence rate by 14% and the seedling vigor length index by 6.3%. Hormonal priming of maternal corms with a concentration of 500 mg/l increased dry weight leaf of main and lateral shoots (34%), dry weight of the main and total shoots (37% ), and also improved emergence rate (56%) and the number of the contractile root of cormlet (77%) with biofertilizer application. The interaction of hormonal priming (250 mg/l) and the use of maternal corms with 7.1 to 10 g increased the weight index of seedling vigor by 72%. Biofertilizer treatment increased 25% of the total dry weight of the shoots. In general, the application of larger corms and the application of biofertilizer and hormonal priming improved cormlet and saffron seedling vigor.
Mohammad Behzad Amiri
Abstract
In order to evaluation of germinaton characteristics and seedling growth of Iranian Ox-Tongue (Echium amoenum) seeds resulting from the rootstock in conditions of application of biological and chemical fertilizers in different planting dates and methods, a split split plot experiment based on CRD design ...
Read More
In order to evaluation of germinaton characteristics and seedling growth of Iranian Ox-Tongue (Echium amoenum) seeds resulting from the rootstock in conditions of application of biological and chemical fertilizers in different planting dates and methods, a split split plot experiment based on CRD design with three replications was conducted in 2014 year, in Ferdowsi University of Mashhad, Iran. The experimental treatments included seeds resulting from treated Iraninan Ox-Tongue with different agronomic factors in farm such as 2 planting dates (10 February and 3 April 2012), 2 planting methods (seed planting and transplanting) and 3 different types of biological and chemical fertilizers (mycorrhiza (Glomus moseae), biosulfur (included Thiobacillus spp.), chemical fertilizer and control). The results showed that mycorrhiza and biosulfur increased germination percentage 18 and 17% and improved germination rate 32 and 33% compared to control, respectively. Mean germination time in conditions of seed planting was less than transplanting conditions. Mycorrhiza application in conditions of seed planting increased radicle length to plumule length 44% compared to control. Effect of planting date was significant on radicle and plumule dry weight, so that the highest radicle (0.0016 g) and plumule (0.0075 g) weight obtained in planting date of 10 February 2012.
