Effect of Leaching a Saline-Sodic Soil, Amended with Two Types of Organic Matters on Salinity and Sodicity of Soil and N, P and K Concentration in Barley

Application of organic fertilizers in saline-sodic soils, can be helpful in their reclamation without chemical amendments. In this research, leaching experiments of a sline-sodic soil with clay loam texture in laboratory columns was conducted in CRD as split factorial. Main factors were: 1) amendment type including manure and compost, 2) amendment application rate including 1, 3 and 5 percentage by weight and 3) leaching stage with 5 levels including: without leaching, once, twice, three times and four times leaching with 30 days intervals. All columns were incubated for 30 days after the addition of amendments and then were leached. The parameters in each column, were studied in three depths as subplot. After the forth month of incubation-leaching period, the EC and SAR of all soil samples decreased from 15 to below 5dSm-1 and from 20.3 to below 13 (mmolc L-1)0.5, respectively. After determining the best level of leaching, the soil of that columns was air-dried and Barley (Hordeum vulgare L. Bahman cultivar) was cultivated in that soil. Pot experiment was conducted in CRD with 7 treatments (control and 6 amendments levels) and 3 replicate. Application of 1% by weight of manure and compost increased nitrogen concentration by 33.8 and 40.5 percentage, phosphorus concentration by 35.7 and 43.3 percentage, and potassium concentration by 8.7 and 19.2 percentage in shoot, respectively.