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saeid ghavamsaeidi noghabi; ali shahidi; Hossin Homami
Abstract
Determination of crop water requirement is of great importance in irrigation planning and effective management of water in agriculture. In this regard, lysimeters are used to measure water input and output and water balance method. Therefore, this research was carried out to determine the water requirement ...
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Determination of crop water requirement is of great importance in irrigation planning and effective management of water in agriculture. In this regard, lysimeters are used to measure water input and output and water balance method. Therefore, this research was carried out to determine the water requirement of Cannabis sativa L. in 2017 at the Faculty of Agriculture of Birjand University. For this purpose, six weighing lysimeters were used and cannabis water requirement was calculated using the water balance equation. Three lysimeters were planted to grass (12 cm height) as the reference crop, and in the other three lysimeters the cannabis plant was cultivated. Based on the results of the water balance equation, the evapotranspiration potentials of the reference plant and cannabis were 899.6 and 688.89 mm, respectively. The length of different stages of plant growth, including the initial, development, middle and end stages, was 30, 55, 75, and 20 days, respectively. Also, the cannabis crop coefficient values in the four stages of plant growth were 0.28, 0.68, 1.01 and 0.54, respectively. These values are recommended for estimating the water requirement and irrigation management of cannabis.
7
Akbar Mohammadi; Mohammad Hossain NajafiMood; abbas khashei; Ali Shahidi
Abstract
Crop coefficient is one of the most important factors in irrigation planning and optimal allocation of water resources to plants. The crop coefficient is obtained through the ratio of actual evapotranspiration to reference crop evapotranspiration. In this research, in order to determine the crop coefficients ...
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Crop coefficient is one of the most important factors in irrigation planning and optimal allocation of water resources to plants. The crop coefficient is obtained through the ratio of actual evapotranspiration to reference crop evapotranspiration. In this research, in order to determine the crop coefficients of Narcissus flower, which is an important ornamental plant, an experiment was conducted during 2018 growing season using lysimeters, in Birjand. Three lysimeter was used in this project and water requirement of Narcissus flower was calculated by water balance method. Turf grass with a height of 12 cm was used to determine reference crop evapotranspiration. The base crop coefficients were obtained as 0.42, 0.85, 0.86, and 0.74, and the coefficients of the soil surface evaporation were 0.49, 0.28, 0.25 and 0.22 at, respectively, primary, developmental, middle, and end stages. Finally, the values of Narcissus flower’s crop coefficients at different stages of growth including primary, developmental, middle, and end stages were calculated as 0.91, 1.13, 1.11, and 0.96. The estimation of water requirement and irrigation management of Narcissus flower will be possible using the obtained Kc values.
Abbas Khashei Siuki; Ali Shahidi; mehdi dastourani; Hamid Reza Fallahi; fatemeh Shirzadi
Abstract
In order to investigate the effect of soil amendments, zeolite and superabsorbent polymer, on the quantity and quality of sesame yield under drought stress, a factorial experiment was performed in randomized complete block design with three replications, at Research Field of College of Agriculture, University ...
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In order to investigate the effect of soil amendments, zeolite and superabsorbent polymer, on the quantity and quality of sesame yield under drought stress, a factorial experiment was performed in randomized complete block design with three replications, at Research Field of College of Agriculture, University of Birjand, in 2017-2018. Treatments included irrigation at two levels of 50% and 100% water requirement and amendment materials at 6 levels of Z0, Z1, Z2, Z3, Z4 and Z5. (Z0= Control, Z1=adsorbent polymer (125 kg / ha), Z2 = 11.2 ton/ hect of zeolite and Z3 =6.2 ton/hect of zeolite, Z4= zeolite 11.2 ton / hect of zeolite + 125 kg / hect of adsorbent polymer, Z5 =6.2 ton/ hect of zeolite + 125 kg /hect/ of adsorbent polymer) In this study, 1000-grain weight, percentage of crude grain oil, crude protein of grain, plant height, grain yield, harvest index, and water use efficiency were investigated. The results showed that 1000-grain weight, oil percentage, grain protein, plant height, and sesame grain yield were affected by different levels of irrigation and amendments at 1% probability level. Also, harvest index and water use efficiency were affected by different levels of amendments at 1% probability level. Oil percentage, grain yield and harvest index were affected by interaction effects of irrigation levels and amendments at 1% probability level. The highest grain weight, percentage of crude grain oil, crude protein of grain, plant height, grain yield, harvest index, and water use efficiency were observed in Z4 treatment. The results showed that the change in irrigation level from 100% to 50% significantly reduced yield. The highest amount of 1000-grain weight in different levels of amendments was 4.12 g in Z4 and the lowest was 2.89 g. in Z0 treatments Also, the highest amount of crude grain oil in irrigation and different levels of amendments was 56.8% and 40.5%, respectively. The highest and the lowest amount of crude protein in response to different levels of amendments were 15.7% and 13.1%, respectively. The results showed that drought stress had a negative effect on plant growth, but the use of zeolite and superabsorbent polymer partially offset this effect.
yahya choopan; abbas khashei; ali shahidi
Abstract
In arid and semi-arid regions, such as Iran, it is inevitable to use wastewater for irrigation. In this regard, the present research was conducted using a completely randomized block design with three replications and five irrigation treatments. The study included well water (control):T1, municipal wastewater ...
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In arid and semi-arid regions, such as Iran, it is inevitable to use wastewater for irrigation. In this regard, the present research was conducted using a completely randomized block design with three replications and five irrigation treatments. The study included well water (control):T1, municipal wastewater of Torbat Heydarieh city:T2, combining 50% well water and 50% wastewater: T3, alternative irrigation with well water and wastewater: T4, and the combination of 34% well water and 66% wastewater (used farmers) T5. Based on the results obtained from the mean square of the traits, effect of the type of irrigation water was significant on yield, number of boll per plant, number of leaves, and plant height at a probability level of 1% (P<0.01), and for stem diameter at 5% probability level (P<0.05). Based on the results, the highest and lowest yields were obtained in T3 and T1 treatments with 133.6 and 78.8 gram per plants, respectively. The highest number of leaves and stem diameter was recorded in T5 treatment as, respectively, 45.3 and 9.5 mm. The highest and the lowest number of bolls were obtained in T2 and the control treatment, respectively, with values of 16.3 and 8.
m t; a sh
Abstract
In this study, we investigated the source of agricultural water supply (qanat) and performance of agricultural crops in Mazreano village of Ardakan-Yazd. First, by using meteorological data and CROPWAT software, water requirement of horticultural products (pistachio and pomegranate) and field crops (wheat, ...
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In this study, we investigated the source of agricultural water supply (qanat) and performance of agricultural crops in Mazreano village of Ardakan-Yazd. First, by using meteorological data and CROPWAT software, water requirement of horticultural products (pistachio and pomegranate) and field crops (wheat, barley, alfalfa and saffron) were determined in all months of the year. Then, volume of water in access of plants requirement and water deficiency in each month was calculated. Considering the water requirement of each crop relative to its economic benefit, we removed wheat, barley, and alfalfa in one scenario and assigned the water requirements of these plants to saffron cultivation. Then, the new cultivation area and the corresponding water demand were determined in each month. Considering the non-conformity of water demand and water availability in all months of the year, we proposed construction of water storage pool and calculated the net profit from the new plantings and compared it with the existing cultivation. The results showed that in this region change in cropping pattern is a proper solution for increased productivity and improving water consumption pattern. Changing the cropping pattern according to the proposed scenario could lead to three-fold economic net profit compared to the existing cropping pattern.