Niloofar Barati; Masoud Rafiee; Marjan Diyanat; Mohammad Reza Ardakani; Weria Weisany
Abstract
Objective: In recent years, the use of conservation tillage methods has been widely considered in the world, and the use of conventional tillage methods has become outdate in some parts of the world. Conservation tillage systems are usually implemented in arid and semi-arid regions. In semi-arid regions, ...
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Objective: In recent years, the use of conservation tillage methods has been widely considered in the world, and the use of conventional tillage methods has become outdate in some parts of the world. Conservation tillage systems are usually implemented in arid and semi-arid regions. In semi-arid regions, the key to increasing agricultural production is to maximize surface water infiltration. In addition, techniques that reduce evaporation from the soil and increase the amount of water available to plants during drought are very important. Therefore, an experiment was conducted in 2022-2023 and 2023-2024 to evaluate the effect of tillage systems on the quantitative and qualitative yield of forage and the activity of antioxidant enzymes in forage legumes. An experiment was conducted in the research farm of the Lorestan Agricultural and Natural Resources Research and Education Center Khorramabad city, in 2022-2023 and 2023-2024.
Methods This experiment was conducted in a split plot based on a randomized complete block design with three replications. Tillage methods (conventional, low-tillage, and no-tillage) were considered as the main factor and forage legumes (Broujerd landrace faba bean, Lamei cultivar vetch, Grass pea, Barakat and Feyz cultivar faba bean) were considered as secondary factors.
Results The results showed that the interaction effect of tillage system and forage legumes was significant on all measured traits except for quality parameters including digestible dry matter, crude protein, crude fiber, ash, water soluble carbohydrates and neutral detergent insoluble fiber was significant at the 1% level of error probability. The highest fresh forage yield (10671.52 and 10581.11 kg h-1), leaf dry weight (16.86 and 16.82 gr) and stem (20.46 and 20.42 gr) in conventional and reduced tillage systems were observed in the Lamei variety of vetch, while the dry forage yield (2820.91 and 2352.82 kg h-1) in conventional tillage systems was observed in the Lamei variety of vetch and the Barakat variety broad bean, and the catalase enzyme (54.09 OD micro gr protein min-1) in the conventional tillage systems was observed in the Lamei variety of vetch. A review of the changes in qualitative traits among forage legumes also showed that the highest digestible dry matter, ash, and crude protein were obtained from Lamei variety of vetch, and the highest water soluble carbohydrates, crude fiber and insoluble fiber were obtained from Barakat variety and Borujerd landrace broad bean.
Conclusion: According to the results, implementing a conventional and low-tillage system compared to a no-tillage system and planting the forage legume, the Laami variety of vetch, had a more beneficial effect on increasing yield characteristics, antioxidant enzyme activity, and forage quality traits.
Azimeh Bagheri; Ataalah Siadat; Ahmad Koochekzadeh; Mohammad Reza Moradi Telavat; Masoud Rafiee
Abstract
In order to investigate the physiological responses of chickpea cultivars to supplemental irrigation and super-absorbent polymer use, an experiment was conducted in 2015 using a split factorial experiment based on randomized complete block design in the research farm of Khorramabad Agricultural Research ...
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In order to investigate the physiological responses of chickpea cultivars to supplemental irrigation and super-absorbent polymer use, an experiment was conducted in 2015 using a split factorial experiment based on randomized complete block design in the research farm of Khorramabad Agricultural Research Center. Factors were supplemental irrigation times (without supplemental irrigation, irrigation in 50 percent of flowering and irrigation in 50 percent of seed filling) as main factor and cultivars (Arman, Azad and Greet) and super absorbent polymer (zero, 100 and 200 kg/ha) in the sub plots. The result showed that the supplemental irrigation and super absorbent polymer reduced soluble carbohydrates and seed protein and increased insoluble carbohydrates, chlorophyll a, chlorophyll b and total chlorophyll. Supplemental irrigation in 50 percent of flowering satge increased 74 percent of seed yield compared to dry land condition. The highest seed yield, biological yield and harvest index were obtained from Greet cultivar with supplemental irrigation at 50 percent of flowering stage and application of 200 kg/ha super absorbent polymer, with the averages 2179 kg/ha, 4012 kg/ha and 54.3 percent, respectively. The results showed that at all levels of supplemental irrigation, the use of superabsorbent polymer improves plant growth conditions and, consequently, significantly increased seed yield. This will increase further by increasing the consumption of super absorbent polymer within supplementary irrigation.
Mohammad saeed Hasanvandi; Masoud Rafiee; Azimeh bagheri
Abstract
Growth analysis is a valuable method in the quantitative analysis of crop growth, development and cropproduction. In order to evaluate effects of nitrogen rates and plant density on physiological growth indicesof safflower, an experiment was conducted at Khorramabad, Lorestan province in 2008. The experimentwas ...
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Growth analysis is a valuable method in the quantitative analysis of crop growth, development and cropproduction. In order to evaluate effects of nitrogen rates and plant density on physiological growth indicesof safflower, an experiment was conducted at Khorramabad, Lorestan province in 2008. The experimentwas carried out as split plot in basis of randomized complete block design with four replications. Threenitrogen application rates were as main plots (N1=control, N2=75 and N3=150 kg/ha net nitrogen) andplant density was as sub plots in 3 levels (D1=40, D2=50 and D3=60 plant/m2). The growth degree dayindex was used to examine more closely fitting growth curves using non-linear regression models.Appropriate model was selected for each growth index. The results showed that application of nitrogenled to increasing of growth indexes including leaf area, total dry matter and crop growth rate. But, netassimilation rate was reduced. Growth indexes such as, leaf area, total dry matter, did not change withincreasing plant density, due to branching of safflower. However, crop growth and net assimilation ratewere reduced in plants. Overall, the results show that applied nitrogen has a more positive effect onsafflower growth index compared to density changes.
Sajad Kordi; Mohammad Eskandari; Ali Fadavi; Mehrshad Barary; Masoud Rafiee; Ali Ashraf Mehrabi
Abstract
A field experiment was conducted to study the physical properties of maize grain in response to different urea fertilization methods (urea foliar spraying and soil application), three harvest times (grain moisture content of 20, 30 and 40 pecent) in four maize hybrids (three foreign hybrids e.g. NS640, ...
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A field experiment was conducted to study the physical properties of maize grain in response to different urea fertilization methods (urea foliar spraying and soil application), three harvest times (grain moisture content of 20, 30 and 40 pecent) in four maize hybrids (three foreign hybrids e.g. NS640, Jeta600 , Konsur580 and one common hybrid, SC704 as control) at Khorram Abad Agricultural Research Station in 2010. The experimental design was a strip split plot based on a complete block design with four replications. The fertilization method was considered as horizontal factor and the vertical factors were hybrid and grain moisture content (harvest time) in a split plot arrangement. Analysis of variance showed that there were significant differences among grain moiusture at harvest time treatments in terms of length, bulk density, real density and specific grain area. The 20% grain moiusture at harvest time was the best based on the physical properties. Also the effect of fertilization methods was significant for grain width and 1000-grain weight. Results showed that the highest grain width (7.81mm) and thousand kernel weight (257.38g) was achieved at urea soil application.. According to the results, Jeta Hybrid showed better physical properties compared to the other hybrids. Because, this hybrid had the highest real density (1.71 g/cm3), porosity (54.23%) and thousand kernel weight (266.57g), indicating higher grain quality.Key words: corn, fertilizer application, hybrid, porosity, real density.