List of Articles Irrigation water use efficiency

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  1 - Evaluation of planting row spacing and plant spacing on the planting row in the sugar beet field in Karaj region
  Reza Esmaeili Rahim Mohammadian Hossein Heidari Sharif Abad Ghorban Noor Mohammadi
  10.2./jpps.2023.698972
  Since the yield of sugar beet is affected by the length of the growing period and agronomic management, to investigate the delayed cultivation, this experiment was conducted in 2015 and 2016 with two treatments of planting row spacing (Pr) with two levels of 25 and 40 c More

  Since the yield of sugar beet is affected by the length of the growing period and agronomic management, to investigate the delayed cultivation, this experiment was conducted in 2015 and 2016 with two treatments of planting row spacing (Pr) with two levels of 25 and 40 cm (main plot) and three levels of plant spacing on row (Ps) using 1.7, 2.4, and 3.1 units per hectare seeds (sub-plot), it was carried out in the form of split plots with a RCBD in four replications. By adding the harvest date treatment with two levels of conventional and delayed in the second year, the statistical design was changed to split plots factorial (Ps and harvest date as factorial). The highest percentage of white sugar content (WSC) and potassium was obtained in the 40 cm row spacing. In the second year, a 37% decrease in the number of final roots compared to the first year caused a 25% decrease in root yield (RY), 31% in white sugar yield (WSY), and 21% in irrigation water use efficiency (IWUE). Contrary to the first year, the effect of Ps was not significant on traits such as RY, WSY, and IWUE, while it had no significant effect on the percentage of WSC in any of the two years. In the second year, with a delay in harvesting, the increase in WSY and IWUE was 32% and 16%, respectively. Therefore, Pr of 25 cm and Ps of 22 cm (2.4 units) is recommended for the Karaj region. Manuscript profile
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  2 - Effect of different levels of nitrogen fertilizer, potassium and water on the quantitative and qualitative characteristics of roselle
  halimeh piri
  Today, changing the pattern of planting towards dehydrating plants is proposed as a solution to drought. One of the plants resistant to drought is roselle. In this research, the effects of different levels of irrigation water, nitrogen fertilizer and potassium fertilize More

  Today, changing the pattern of planting towards dehydrating plants is proposed as a solution to drought. One of the plants resistant to drought is roselle. In this research, the effects of different levels of irrigation water, nitrogen fertilizer and potassium fertilizer on roselle were investigated. The experiments were carried out in a split plot design with four levels of irrigation water depths (I1, I2, I3 and I4, respectively 25, 50, 75 and 100% of the plant water requirement) and three levels of nitrogen (N1, N2 and N3 respectively 50, 75 and 100% nitrogen) as a sub plots and three levels of potassium (K1, K2 and K3 respectively 50, 75 and 100% potassium) as subplots. At the end of the experiment, plant height, capsule weight, dry yield, anthocyanin content and irrigation water productivity were measured. The results of the experiment showed that the effects of irrigation water and potassium fertilizer were significant at 1% and 5% probability level on all measured parameters and nitrogen fertilizer on all parameters except for irrigation water productivity. The highest yield was obtained from 100% fertilizer application and 100% water requirement, but no significant effect was observed between treatment of 100 and 75% of water requirement. The highest irrigation water productivity was obtained in 75% water treatment and 100% nitrogen and potassium fertilizer application, but no significant difference was found between different treatments of nitrogen fertilizer. Therefore, considering the status of the water in the area and the reduction of water resources, the use of 75% of the water requirement will save water consumption without having a significant effect on the reduction of yield. Also, due to dry weather conditions in Sistan province, the use of potassium and nitrogen fertilizer can modify the drought stresses in roselle. Manuscript profile