Abbas Nasiri Dehsorkhi; Hassan Makarian; Mehrdad Mahlooji; SeyedHassan Mirhashemi; Siavash Bardehji; Sima Sadat Seyedi; Navid Kargar Dehbidi
Abstract
An experiment was conducted at the Faculty of Agriculture, Shahrood University, as a randomized complete block design with four replications to investigate the effect of ultrasonic waves and seed priming on some quality traits of cowpea under soil application of trifluralin. Nine treatments were: T1: ...
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An experiment was conducted at the Faculty of Agriculture, Shahrood University, as a randomized complete block design with four replications to investigate the effect of ultrasonic waves and seed priming on some quality traits of cowpea under soil application of trifluralin. Nine treatments were: T1: control, T2: ultrasonic waves, T3: ultrasonic waves + reduced herbicide dose (1 L ha-1), T4: ultrasonic waves + recommended herbicide dose (2 L ha-1), T5: hydro-priming, T6: hydro-priming + reduced herbicide dose, T7: hydro-priming + recommended herbicide dose, T8: reduced herbicide dose, T9: recommended herbicide dose. The results showed that the effect of treatments was significant on all traits except leaf phosphorus. The maximum chlorophyll a (1.30 mg g-1 FW), carotenoid (1.82 mg g-1 FW), leaf relative water content (79.9 %), and leaf nitrogen (3.97%) were obtained in ultrasonic treatment, which resulted in a significant increase of 28.7, 22.1, 7.9, and 18.5 percent, respectively, in comparison to the control. In comparison to the ultrasonic treatment, ultrasonic waves + recommended herbicide dose reduced chlorophyll b, RWC, and leaf nitrogen by 29.3, 21.1, and 35.3 percent, respectively. In comparison to herbicide application alone, the combination of ultrasonic waves and the recommended herbicide dose reduced chlorophyll a and total chlorophyll by 29.7 and 22.2 percent, respectively. Overall, the results of the present study showed that pretreating cowpea seeds with ultrasonic waves could increase photosynthesis pigments, relative water content, and leaf N (in the absence of herbicide use).
Mehrdad Mahlooji; Abas Nasiri Dehsorkhi
Abstract
Salinity is one of the most important abiotic stresses because it causes zinc to precipitate in an unusable form for plants and is influenced by saline-calcareous soils. This experiment was carried out in a strip split block design with three replications at the Esfahan Rodasht Drainage and Salinity ...
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Salinity is one of the most important abiotic stresses because it causes zinc to precipitate in an unusable form for plants and is influenced by saline-calcareous soils. This experiment was carried out in a strip split block design with three replications at the Esfahan Rodasht Drainage and Salinity Research Station to investigate the effects of agrophysiological responses of barley genotypes to zinc fertilization and water saline irrigation. As vertical factors, water irrigation quality at three levels, 2, 10, and 18, dS/m, were used. Fertilizer application included Nano zinc-oxide, zinc-chelate, a mixture of Nano zinc-oxide and zinc-chelate, and water as a control. Within vertical factors, three different barley genotypes are arranged, including Morocco (moderate semi-sensitive), Nosrat (moderate tolerant), and Khatam (tolerant). The results showed that the application of Zn-chelate fertilizer resulted in the highest grain yield, K+ concentration, and K+/Na+ ratio in shoots. In Khatam, stomatal conductance (gs), the maximum quantum efficiency of PSII (Fv/Fm), K+ and Zn2+ concentrations, and the K+/Na+ ratio were all higher than in Morocco. In comparison to Morocco, Khatam had lower Na+ and Ca2++Na+ contents. Furthermore, as salinity stress increased, all barley genotypes showed a decreasing trend in K+ content and the K+/Na+ ratio in shoots.
