List of Articles macronutrients

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  1 - Effects of Soil Salinization and Waterlogging on the Concentrations of Some Macronutrients and Sodium in Corn Root
  نصرت اله Najafi
  Salinity and waterlogging are two abiotic stresses decrease plants yield. In this research, the effects of soil salinization and waterlogging having concentrations of calcium (Ca), potassium (K), magnesium (Mg) and sodium (Na) and K:Na ratio in corn (Zea mays cv. single More

  Salinity and waterlogging are two abiotic stresses decrease plants yield. In this research, the effects of soil salinization and waterlogging having concentrations of calcium (Ca), potassium (K), magnesium (Mg) and sodium (Na) and K:Na ratio in corn (Zea mays cv. single cross 704) root were studied under greenhouse conditions. A factorial experiment with two factors on the basis of completely randomized design with three replications was performed. The factors under study were: waterlogging duration in five levels (0, 2, 4, 8, 20 days) and soil saturate extract salinity in four levels (0.11, 2, 4, 8 dS/m). A loamy sand soil for plant growth substrate and NaCl salt for establishing the levels of salinity was used. The salinity and waterlogging factors were imposed simultaneously to the plants from the five-leaf stage of plant growth period. The plants were harvested 60 days after sowing and the concentrations of Ca, K, Mg and Na in corn root were determined by dry ashi method. The results showed that by increasing the level of NaCl salinity in the soil, the K concentration and K:Na ratio of corn root were decreased significantly but concentrations of Ca, Mg and Na in corn root were increased significantly. The Mg and Na concentrations of root in waterlogged conditions were significantly lower than that of non-waterlogged conditions but the K and Ca concentrations of root in waterlogged conditions were significantly greater than non-waterlogged conditions. However, the effects of soil waterlogging duration on the Ca, K, Mg and Na concentrations and Na:K ratio of root were dependent on the level of NaCl salinity in the soil. The results demonstrated that even short periods of soil waterlogging had considerable long-term effects on the concentrations of Ca, K, Mg and Na and K:Na ratio in corn root under saline and non-saline conditions. Manuscript profile
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  2 - Effect of potassium and manganese on qualitative and quantitative yield of sugar beet in the north of Khuzestan
  Hossien Obeidi Behnam Habibi Khaniani Hamid Sharifi
  10.22034/aej.2015.520858
  In order to investigate the effect of different amounts of potassium and manganese on qualitative and quantitative yield and other traits of sugar beet in the northern of Khuzestan, a split block experiment was conducted based on complete randomly block with 12 treatmen More

  In order to investigate the effect of different amounts of potassium and manganese on qualitative and quantitative yield and other traits of sugar beet in the northern of Khuzestan, a split block experiment was conducted based on complete randomly block with 12 treatments in three replication in fall cropping season October 2013-2014 in farmland of Haft Tapeh area of Susa city. A resistant mono germ genotype with high yielding named Spartak was used in this study. Examined factors included employing potassium fertilizer treatment in four levels of 0, 1, 2 and 3 kg/ha and manganese fertilizer in 0, 1, 2 kg/ha rates. Spraying with potassium fertilizer had a significant effect on root and white sugar yield. The highest root and sugar yield in treatment were achieved with 3 kg/ha of potassium fertilizer with 80.6 ton/ha root yield and 13.63 ton/ha white sugar yield. Using manganese fertilizer hadn’t significant effect on root yield and other studied traits. Also, using different rates of potassium and manganese fertilizers did not have much influence on qualitative characteristics of sugar beet such as nitrogen, sodium and potassium amounts in root, sugar extraction coefficient, molasses percentage, raw sugar and white sugar percentage. On the whole, using potassium and manganese during the vegetative growth stage of sugar beet is recommendable. Manuscript profile