Showing 3 results for Ramroudi
Mahmoud Ramroudi, Aghafakhr Mirlohi,
Volume 1, Issue 1 (summer 1997)
Abstract
In order to find suitable cultivar and N-topdress rates in corn planted after wheat harvest, a field experiment was conducted in Isfahan University of Technology Experiment Farm located at Shervedan, Falavarjan in 1994. The experiment design was a split plot with a randomized complete block arrangement and four replications. Main plots were four N-topdress rates (0, 90, 180, and 270 kg/ha) and the subplots were three corn hybrids (S.C.I08, S.C.301, and D.C.370). N-topdress rates had no effect on the stages of plant development (50% emergence, transition, pollination and physiological maturity). Also there were no significant effects on the number of leaves per plant, LAI, plant height and plant dry weight measured at pollination stage for different N-topdress rates. As expected, plant development stages differed among hybrids except that of time until 50% emergence. Differences in the number of leaves per plant, LAI, plant height and dry weight of plant measured at pollination stage were highly significant among hybrids. D.C. 370 had the highest values for all of these characteristics. Dry matter accumulation during growing season increased as the N-topdress rates were increased for the hybrids. Also N-topdress rates x hybrid interaction was significant for biological yield. Grain yield, number of seeds per ear, 100-seed weight and biological yield were affected by N-topdress rates and hybrid. Higher grain yield of D.C. 370 can be attributed to greater number of seeds per ear. The results of this study suggest that D.C. 370 with 90 kg/ha N-topdress rate can be used after wheat harvest in Isfahan.
A Jalali, M Galavi, A Ghanbari, M Ramroudi, M Yousef Elahi,
Volume 14, Issue 52 (sumer 2010)
Abstract
Using treated wastewater led to increasing crop yield, but it may causes heavy metals accumulations and also their toxicity in soil and plant. In order to investigate the effects of wastewater on yield, forage yield components, and heavy metals concentrations in stem and leaf of sorghum, an experiment was conducted in the agricultural Research Institute of Zabol University in 2006-2007, using a randomized complete block design with four replication. The irrigation treatments were: 1) well water for whole growing season as control (T1), 2) well water for all growing season along with NPK application (T2), 3) wastewater during the first half of growing season (T3), 4) wastewater during the second half of growing season (T4), 5) wastewater and tapwater alternately (T5) and 6) wastewater for whole growing season (T6). The results showed that irrigations with wastewater and well water alternately and wastewater for whole growing season produced the maximum forage yield and the maximum heavy metal accumulation in plant organs observed by irrigation with wastewater for hole growing season, and wastewater and well water alternately. There was significant increase between T5 and T6 relative to control and other treatments. The elements concentration such as Cu, Pb and Fe in leaf was more than stem, but Zn and Ni concentration in stem were more than leaves. There were no significant differences for Mo and Cr concentration between stem and leaf. Forage yield in T6 and T5 relative to T2 were increased 38.96 and 51.95 percent respectively. In all irrigation treatments the amount of elements and heavy metals in sorghum were lower than standard limits. Based on the results, alternative irrigation method (T5) is recommended for forage sorghum production.
M. Shamsalddin Saied, A. Ghanbari, M. Ramroudi, A. Khezri,
Volume 21, Issue 1 (Spring 2017)
Abstract
Cover crops, conservation tillage systems and organic fertilizers have played an important role in maintaining or enhancing soil quality. In order to assess the combined effects of these techniques on soil quality an experiment was conducted as split Plot experiment based on randomized complete block design with three replications at Shahid Bahonar University of Kerman in 2011-2012.
The method of return of cover crops to soil included reduced tillage (disc) and no-till (herbicide glyphosate + cutting) as the main factor and manure application management included cover crops (wheat, canola and peas) without the use of urea, cover crops with a consumption of 25 t/ha of manure, Cover crop with 75 kg of urea and fallow treatments (without cover crop) as subplots. The results showed that the highest concentration of nutrients (except N and P concentrations in the plant), the nutrient yield and biomass of cover crops belonged to wheat treated with urea fertilizer. Soil properties such as bulk density, pH, organic matter and soil nutrient concentrations (nitrogen, phosphorus and potassium) were significantly affected by fertilizer management and the method of return of cover crops to soil (except pH) and soil organic matter content and nutrient concentration were affected by their interactions. In wheat cover crop treatments with urea with %27.53 reduction in bulk density, %20.88 increase in the porosity, organic matter 2.4 times and nitrogen 1.5 times compared to the fallow treatment was the best treatment that wasn’t significantly different from the wheat treated with manure in low- tillage system. Wheat treated by manure had the highest phosphorus that was 3.5 times of the phosphorus concentration in the fallow treatment. So, in order to develop sustainable agriculture, reducing the use of synthetic fertilizers and environmental protection, the wheat cover crop treatments with manure and low- tillage cropping systems would be appropriate in Kerman.
