Fertigational Effects of Sugar Mill Effluent on Agronomical Characteristics of High Yield Cultivar of Sugarcane (Saccharum officinarum L.) in Two Seasons

Fertigational effects of 10%, 25%, 50%, 75% and 100% concentrations of sugar mill effluent on high yield cultivar of sugarcane (Saccharum officinarum L., cv. CoS 8436) was investigated in the winter and summer season. Fertigation with different concentrations of the sugar mill effluent resulted in significant (P<0.01) changes in the soil parameters namely electrical conductivity (EC), pH, organic carbon (OC), sodium (Na+), potassium (K+), calcium (Ca2+), magnesium (Mg2+), total Kjeldahl nitrogen (TKN), phosphate (PO43-), sulphate (SO42-), iron (Fe2+), cadmium (Cd), chromium (Cr), copper (Cu), manganese (Mn) and zinc (Zn) of the soil in both seasons. The contents of Cd, Cr, Cu, Mn and Zn in the soil were found to be below the maximum levels permitted for soils in India. The agronomic performance of S. officinarum was increased from 10% to 25% and decreased from 50% to 100% concentrations of the sugar mill effluent in both seasons compared to controls. The best results of different agronomical parameters of S. officinarum were noted with 25% concentration of the sugar mill effluent. The accumulations of heavy metals were increased in the soil and S. officinarum from 10% to 100% concentrations of the sugar mill effluent in both seasons. Biochemical components like total sugars, crude fiber and crude carbohydrates were recorded highest with 25% concentration of the sugar mill effluent in both seasons. The contamination factor (Cf) of various heavy metals was observed in the order of Mn> Cu> Zn> Cd> Cr for the soil, and Cd> Cr> Mn> Cu> Zn for S. officinarum in both seasons after fertigation with sugar mill effluent. The contents of Cu, Mn and Zn except Cd and Cr in S. officinarum were noted under the permissible limit of FAO/WHO standards.

کلیدواژه ها:

Saccharum officinarum ، Sugar mill effluent ، Fertigation ، Heavy metals ، Winter and summer season