List of Articles Potassium Humate

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  1 - Laboratory Evaluation the Organic Amender’s Effect on the Leaching Process of Saline- Sodic Soils
  MOHAMMADREZA DALAIAN FATEMEH ZABIHI samira sarbazrashid
  10.30495/wsrcj.2021.19210
  Background and Aim: Soil salinity and alkalinity are one of the most important destructive soil processes, especially in arid and semi-arid regions. Sodium soils are faced with degradation of soil structure, reduction of permeability and speed of water movement in the s More

  Background and Aim: Soil salinity and alkalinity are one of the most important destructive soil processes, especially in arid and semi-arid regions. Sodium soils are faced with degradation of soil structure, reduction of permeability and speed of water movement in the soil, runoff increasing, decrease of land use, ventilation decreasing, and finally, decrease of crop yield. Many researches have been conducted based on physical, chemical, and biological methods to improve the saline and sodic soils, but the hybrid method is the most effective in the improvement of these soils. In this study, the effect of two organic amenders (Potassium Humate and Chicken Feather-CF) with leaching in improving some physical and chemical properties of saline and sodic soils has been investigated.Method: In this research, a factorial experiment in a completely randomized design with 16 treatments and 3 replications was conducted. The first factor was the type of amender (Potassium Humate and Chicken Feather), the second factor was the amount of amender (0.75 and 1.5 Weight percentage) and the third factor was leaching levels (no leaching, 45, 90, and 135 days of incubation). After sampling from depth 0 to 30 cm and measuring some physical and chemical properties of the soil samples, the amenders are mixed with the soil and the soil moisture content was delivered to the field capacity (0.7-0.8 FC). Then the soil samples were poured into the columns. Soil columns were leached at three intervals of 1.5 months with the amount of one pore volume (P.V). At each leaching stage, the properties such as soil acidity (pH), electrical conductivity (ECe) and sodium adsorption ratio (SAR) in drainage water (DW) and pH, EC, SAR, cation exchange capacity (CEC), exchangeable sodium percentage (ESP), wet aggregate stability (WAS), organic carbon (OC) and hydraulic saturation conductivity (Ks) were measured in soil columns. Statistical analyzes and the comparison of means were performed by LSD test and using SPSS17 software. The graphs were drawn with EXCEL software.Results: The results showed that Potassium Humate reduced the pH of the soil and increased the pH of DW. This effect was more as the amender’s weight and leaching increased. Also, Potassium Humate reduced the ECe of soil and this effect was more as the leaching increased. The findings showed that the high amount of amenders led to the high SAR in DW. As the leaching stage increased, the SAR of soil decreased in both amenders. The 1.5% of amenders amount had more effect on the reduction of SAR than the level of 0.75% in both amenders. With increasing leaching, the CEC of soil decreased. The highest CEC (31.2 cmolc.kg-1) was obtained in the CF with 1.5% of the amender’s amount. When the number of amenders increased, the CEC of soil increased. Also, when the leaching and the amount of CF increased, the ESP of soil decreased.The results showed that with increasing the leaching in Potassium Humate, the % OC of soil decreased. The WAS increased with increasing the amount of CF. The highest amount of WAS was in CF (1.5%). Potassium Humate in high amounts (1.5 %) reduced Ks. Ks decreased with increasing leaching from the second leaching stage onwards.Conclusion: In general, it can be concluded that the addition of amenders increases the pH and SAR in the DW and decreases the pH (from 8.24 to 7.39), ECe (from 17.07 to 0.8 dS.m-1) and SAR (from 19.34 to 11.1 (cmolc.l-1)0.5) in the soil. Leaching increased pH and ECe in DW and decreased CEC, ESP in soil and decreased KS by increasing leaching stages after the second leaching stage. Potassium Humate reduced OC%, KS and Chicken Feather increased CEC and WAS and decreased ESP in soil. In general, Chicken Feather (with 0.75%) along with leaching is recommended to modify the saline and sodic soils. Manuscript profile
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  2 - Potassium humate foliar application effects on yield and yield components of different potato cultivars at spring cultivation in Ardabil region
  Jalil Ajalli Saeid Vazan Farzad Paknejad Mohammad Reza Ardekani Ali Kashani
  The effect of different concentrations of potassium humate organic matter was investigated on yield and yield components of five potato varieties in spring planting date of 5th May in Ardabil region, northwest Iran. Experiment was carried out as factorial based on a ran More

  The effect of different concentrations of potassium humate organic matter was investigated on yield and yield components of five potato varieties in spring planting date of 5th May in Ardabil region, northwest Iran. Experiment was carried out as factorial based on a randomized complete block design with three replications during 2010 and 2011 growing seasons. Potassium humate was applied at three levels (0, 250 and 300 mL.ha-1 in 300 liter water) and the studied potato varieties included Agria, Savalan, Kaizer, Markiz and Lota. Traits including number of stems, number and weight of tubers per plant, and tuber yield were measured during growing season and after harvesting. Results revealed significant effect of potassium humate, variety and interaction of potassium humate and variety on the studied traits. Savalan and Agria had the highest number of main stems per plant and the lowest number of that was observed in Lota. Number of tubers per plant was higher for Savalan than other studied cultivars. The highest number of tubers per plant was obtained with 250 mL.ha-1 potassium humate application. Savalan also produced the highest tuber weight per plant. The highest tuber weight per plant was obtained when 250 mL.ha-1 potassium humate was applied. Savalan produced the highest total tuber yield when 250 mL.ha-1 potassium humate was applied. Based on the results, Savalan, Kaizer and Markiz were recognized as high product and stable varieties, whereas Agria and Lota were unstable ones with lower yield. Manuscript profile
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  3 - Effect of potassium hummate on seed germination, tuber yield and yield components, and estimation of heterosis rate and dominance degree in true potato seed hybrids
  Davoud Hassanpanah Anvar Asadi
     This research was performed to evaluate the effect of potassium humate on potato seed germination rate in the greenhouse, tuber yield and yield components in the field and estimation of heterosis rate and dominance degree in true potato seed hybrids during More

     This research was performed to evaluate the effect of potassium humate on potato seed germination rate in the greenhouse, tuber yield and yield components in the field and estimation of heterosis rate and dominance degree in true potato seed hybrids during three years (2008-2010). In this experiment, 3500 true seeds of potato hybrid variety HPS-II/67 were planted after treated with potassium humate for 6, 12, 18 and 24 hours in the planting bed of Biolan peat mass in the greenhouse and direct seed planting was considered as a control. Attributes such as time to seed germination, seed germination percentage and days to germination were recorded in the greenhouse. 540 potato seedlings were transferred to the field at 4-5 leaf stages. The experimental design was a completely randomized block design with three replications. After harvest, number and weight of tubers per plant, tuber average size and marketable tuber yield were counted and measured and 300 hybrids were selected. The selected hybrids with Agria cultivar (control) were planted at Agricultural and Natural Resources Research Station of Ardabil during 2010. The results showed that differences between different treatments of potassium humate were significant for tuber number and weight per plant, tuber average size and marketable tuber yield. The maximum seed germination percentage, tuber number and weight per plant and marketable tuber yield were obtained for 6, 12 and 18 hours treatments of potassium humate. Potassium humate increased germination by 41% and 1.2 kg per m2 marketable tuber yield. Mean tuber yield per plant was 550 g in control and 613.08 g in hybrids. Tuber yield per plant for hybrids had 23.67% over dominance, 6.33% complete dominance, 64% reduction dominance and 6.0% without dominance. In this experiment, about 50.33% of hybrids (151 hybrids) had high tuber yield per plant than their control. Heterosis for tuber yield per plant was achieved 50.33%. Finally, 50 hybrids were selected regarding to tuber yield, tuber uniformity, shallow eye depth, short stolon and yellow flesh and skin color, heterosis rate and dominance degree.   Manuscript profile