Agriculture and horticulture
Z. Izadi; A. Biabani; H. Sabouri; B. Bahreyninejad
Abstract
Datura stramonium L. is one of the important medicinal plants in the pharmaceutical industry due to its alkaloid compounds. To investigate the effects of urea fertilizer at three levels (60, 120, and 180 kg.ha-1) and planting density at three levels (6, 10, and 14 plants.m-2) on the yield and yield components ...
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Datura stramonium L. is one of the important medicinal plants in the pharmaceutical industry due to its alkaloid compounds. To investigate the effects of urea fertilizer at three levels (60, 120, and 180 kg.ha-1) and planting density at three levels (6, 10, and 14 plants.m-2) on the yield and yield components of this plant species, a factorial experiment was conducted in a randomized complete block design in the research farm of Isfahan Agricultural and Natural Resources Research and Education Center, Iran in 2018 and 2019 crop years. The main effects of density and urea on the traits including height, number of lateral branches, and 1000-seed weight and the interaction of different urea and density levels on the traits including seed yield, biological yield, number of capsules per plant, number of seeds per plant, and number of seeds per capsule were significant in both years. The highest seed yield (1282.37 and 1212.53 kg.ha-1, respectively in 2018 and 2019 years) was obtained in the urea fertilizer 180 kg.ha-1 and 6 plants.m-2 treatment. The causal analysis results showed that the highest direct positive effect at the different levels of density and urea was related to the number of capsules per plant. The results of this experiment showed that the application of 180 kg.ha-1 of urea and 6 plants.m-2 could play an important role in increasing the seed yield of medicinal plant D. stramonium.
S.H. Davoudi; A. Biabani; A. rahemi-karizaki; S.A.M. modares sanavi; E. Gholamalipor Alamdari; M. Zarei
Abstract
To investigate the effect of iron and zinc chelates on some quantitative and qualitative characteristics of medicinal plant black cumin (Nigella sativa L.), a factorial experiment was conducted in a randomized complete block design with three replications in two areas (the research farm of 1- Gonbad ...
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To investigate the effect of iron and zinc chelates on some quantitative and qualitative characteristics of medicinal plant black cumin (Nigella sativa L.), a factorial experiment was conducted in a randomized complete block design with three replications in two areas (the research farm of 1- Gonbad Kavous University in Golestan province and 2- Agriculture Faculty of Tarbiat Modares University in Tehran province). Experimental treatments included control )spray with pure water), and separate foliar spray of iron: iron nano-chelate at two levels of 1.5 and 4 per 1000 and iron chelate at 3 per 1000 and zinc: zinc nano-chelate at two levels of 1.5 and 3 per 1000 and zinc chelate at 3 per 1000. The treatments were applied in the 8-10 leaf stage and at the time of filling the capsules. The application of nano forms of iron and zinc chelates compared to the common forms had a significant relationship with yield and yield components and qualitative characteristics and increased them. Concentrations of 4 per 1000 of iron nano-chelate and 3 per 1000 of zinc nano-chelate caused the highest increase in seed yield (217.47 g m-2 in Gonbad and 288.67 g m-2 in Tehran), biological yield (582 g m-2 in Gonbad and 337.2 g m-2 in Tehran), harvest index (37.43% in Gonbad and 76.46% in Tehran), and oil percentage and yield. The highest numerical values for cell leakage (57.70 µmol g-1FW in Gonbad and 64.72 µmol g-1FW in Tehran) and prolin (13.40 mg g-1FW in Gonbad and 11.51 mg g-1FW in Tehran) were related to iron and zinc chelate treatments (common forms). Based on the results, the application of the nano form of iron and zinc, even at low concentrations, could positively affect the quantitative and qualitative yield.
