قیمت محصول :     10000 تومان
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سبد خرید

  • سبد خریدتان خالی است.
  • تاریخ ارائه محصول : 09 / 08 / 2019
  • بازدید : 102 بار
  • دسته بندی :
  • امتیاز کاربران :

Assessment of Soil Genesis in a Salt-Affected Plain for Soil Reclamation

Assessment of Soil Genesis in a Salt-Affected Plain for Soil Reclamation and Improvement Strategies in Miandoab Region

In order to monitoring nature and genetic properties of salt-affected soils under influence of Urmia Lake in Miandoab region, western-Azerbaijan province, seven soil profiles were described, sampled, and analyzed. The significant differences between the soluble values of Cl-1, Na+1, K+1, Mg+2, and Ca+2 at each profiles date indicated clearly a temporal distribution, which can be attributed to other soils properties (e.g., particle-size distribution) and the high soluble salt content of groundwater in the study area. Based on the values of organic carbon (OC), the majority of soil samples were categorized as extremely poor (< 0.6% of OC) and poor (0.6-1.2% of OC) probably due to poor plant growth and low input rates of organic matters. In accordance with the soil texture and the low organic matter content, the cation exchange capacity (CEC) of the soils were rated in low to medium category, ranging 6 to 27 cmol kg-1. The soils indicated some differences in the value of iron oxides and their vertical distribution within the profiles that might related to pedogenic processes, seasonal fluctuations in water table, and repeated cycles of sediment accumulation. The XRD patterns of the clay fraction from all of the soil profiles exhibited a similar composition of phyllosilicate minerals, including illite, smectite, chlorite, vermiculite, and kaolinite. Indeed, the minerals were similar in type but some different were observed in the intensity, position, and peak figure of them (except kaolinite) mainly due to the change in drainage condition and ground water table depth. Suggested management practices to improve of these soils are the combination of physical management, leaching and drainage, the application of elemental S, organic matter, farm manure, mulching, and planting of salt-tolerant crops.

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