Paper Information

Journal:   JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)   MAY-JUNE 2012 , Volume 26 , Number 2; Page(s) 272 To 281.
 
Paper: 

BIOAVAILABILITY OF NUTRIENTS IN THREE TEXTURAL CLASSES OF A CALCAREOUS SOIL AFFECTED BY ADDITION OF SEWAGE SLUDGE AND FERTILIZER AFTER HARVESTING CORN

 
 
Author(s):  BOOSTANI H.R.*, RONAGHI A.
 
* DEPARTMENT OF SOIL SCIENCE, COLLEGE OF AGRICULTURE, SHIRAZ UNIVERSITY
 
Abstract: 

Now days, Use of sewage sludge (SS) in agriculture as inexpensive source included macro and micro nutrient has been attended. Purpose of experiment performance was comparison of SS application with fertilizer treatment (F) on some nutrient bioavailability in three textural classes of a calcareous soil after harvesting corn. A factorial experiment was carried out in a completely randomized design with two factor and three replications under greenhouse conditions. Results indicated that soil total nitrogen (TN), available phosphorous (P) and potassium (K) were increased significantly by addition of SS in all three soil textures. TN and available P were significantly lower in fertilizer treatment compared with SS amended soil in all three soil textures. Addition of SS in increasing soil K was lower than the increase in soil P or TN which is probably due to the low content of K in SS. Soil DTPA extractable iron (Fe), zinc (Zn), copper (Cu), and manganese (Mn) significantly increased with SS application in all three soil textures and was higher than fertilizer treated soil textures. Based on nutrient bioavailability in soil textures after harvesting corn, especially at high rates of SS, addition of most nutrients are not necessary for next crop. Concentration of DTPA extractable cadmium (Cd) and Lead (Pb) were not detectable in soil textures amended with SS after harvesting corn, therefore, low content of Cd and Pb in utilized SS reveals that reaching a toxic level of these elements in soil is unexpected. However, if frequently high levels of SS are applied, soil test is recommended for monitoring heavy metals concentration amended soils. Nutrient security of corn and eliminate of Fe and Zn deficiency in calcareous soils are advantages of SS application in agricultural land. Prior to any SS recommendations, the results need to be verified under field conditions.

 
Keyword(s): SEWAGE SLUDGE, BIOAVAILABILITY, NUTRIENTS, CALCAREOUS SOIL, CORN
 
References: 
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