mohsen zafaranieh; arman Azari
Abstract
The present study tries to quantify germination response of Guar (Cyamopsis tetragonoloba) to temperature and water potential. Performed in Vali-e-Asr University laboratory in 2020, it is a completely randomized design in a factorial arrangement with four replications. It aims at quantifying the rate ...
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The present study tries to quantify germination response of Guar (Cyamopsis tetragonoloba) to temperature and water potential. Performed in Vali-e-Asr University laboratory in 2020, it is a completely randomized design in a factorial arrangement with four replications. It aims at quantifying the rate of Guar germination in response to temperature, and water potential. The seeds have been germinated at seven temperatures (5, 10, 15, 20, 25, 30, and 35°C) and six water potentials (0, -0.2, -0.4, -0.6, -0.8, and -1 MPa). The results reveal that the Beta function is suitable for describing the response of seed germination temperature, and water potential. Under different water potentials, base, optimum, and maximum temperatures have been 7.3-12°C, 22.1-25.8°C, and 32.2-36°C, respectively. The hydrothermal time parameters are 268.3 bar °C h, -1.103 MPa and, 8.36°C for ɵHT (hydrothermal time constant). The data obtained from these models can be used to establish and manage guar for cultivation in different areas.
mohsen zafaranieh
Abstract
In order to evaluate the effects of planting date and plant density on phenology, seed yield, and essential oil quality of Guar, an experiment has been conducted during 2018-2019 and 2019-2020 growing seasons. It is a split plot layout based on a randomized complete block design with three replications. ...
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In order to evaluate the effects of planting date and plant density on phenology, seed yield, and essential oil quality of Guar, an experiment has been conducted during 2018-2019 and 2019-2020 growing seasons. It is a split plot layout based on a randomized complete block design with three replications. Different planting dates are considered as the main factor, including September 5th to February 5th as monthly. Three plant densities are considered as sub-factor (20, 40, and 60 plants in a square meter). The required growing degree- day (GDD) from sowing to physiological maturity ranges between 1802.3 and 2347.9 °d on different planting dates. The highest GDD from sowing to physiological maturity is observed on May 5th. The highest seed yield (3780 kg / ha) and galactomannan yield (1050 kg / ha), 100- seed weight (3.5 g), and oil percentage (17.9%) belong to May 5th + 40 plants per m2. by delaying planting time, 100- seed weight causes oil percentage to drop and the seed yield (40%), galactomannan (68%) and the oil percentage (15%) are observed in September. Therefore, it seems that the best time and density for planting Alyssum is May 5th with a density of 40 plants per m2.
Mohsen Zafaranieh
Abstract
In order to evaluate yield and yield components properties of cold-tolerant chickpea under winter sowing and complementary irrigation conditions, two experiments in the context of partial balanced block design with 81 chickpea genotypes and three replications were carried out. Complementary irrigation ...
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In order to evaluate yield and yield components properties of cold-tolerant chickpea under winter sowing and complementary irrigation conditions, two experiments in the context of partial balanced block design with 81 chickpea genotypes and three replications were carried out. Complementary irrigation was performed during growing season including irrigation immediately after sowing, 20 days after the first irrigation and at early phase of flowering. After winter cold, survival percentage of the chickpea genotypes was calculated and total precipitation rate from sowing to harvesting was 267 mm. Moreover, properties of grain yield components (survival percentage, pod number per plant, the number of grains per pod and weight of 1000 grains), grain yield, biological yield and harvest indices of the genotypes were measured and recorded. Based on the results, the difference between the genotypes was significant for all the measured properties. Under complementary irrigation, 40 percent of the genotypes showed winter survival rate higher than 76 percent and grain yield in 52 percent of the genotypes was higher than 100gr/m2. Under winter sowing condition, grain yield in 32 percent of the samples was higher than 40gr/m2. Finally, under winter sowing and complementary irrigation regime, the genotypes ‘MCC333’, ‘MCC186’, ‘MCC803’ and ‘MCC743’ possessing yield over 600 kg/ha were determined as the superior genotypes.