THE RESPONSE OF N MINERALIZATION, MICROBIAL BIOMASS N AND UREASE ACTIVITY IN CD-CONTAMINATED SOILS TO COMPOST ADDITION

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DAYANI LEILA; RAIESI FAYEZ

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Journal: JOURNAL OF AGROECOLOGY (کشاورزی بوم شناختی) Year:2012 | Volume:2 | Issue:2 Page(s): 1-15

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Information Journal Paper

Title

THE RESPONSE OF N MINERALIZATION, MICROBIAL BIOMASS N AND UREASE ACTIVITY IN CD-CONTAMINATED SOILS TO COMPOST ADDITION

Author(s)

DAYANI LEILA | RAIESI FAYEZ | Issue Writer Certificate

Keywords

HEAVY METALSQ3

SOIL MICROBIAL ACTIVITYQ4

SOIL N DYNAMICQ4

ENZYME ACTIVITYQ4

COMPOSTQ4

SOIL AMENDMENTSQ4

Abstract

A high level of cadmium (Cd) in the environment generally influences the population, activity and composition of soil microorganisms, especially N dynamics and enzyme activities, with a consequence for nutrient cycling and availability. The addition of organic materials to the Cd-polluted soils may reduce the detrimental effects of Cd on microbial activities and biochemical properties. The objective of the current study was to examine the effect of COMPOST as a soil amendment on N mineralization, microbial biomass N and urease activity in soils spiked with fresh Cd. A 2×5 factorial experiment consisting of two levels of COMPOST (0 and 2.5 t ha-1) and five levels of Cd (0, 50, 100, 150 and 200 mg Cd kg-1) arranged in a completely randomized design with three replicates was carried out under laboratory conditions. Measured total and available cadmium at the end of incubation period indicated a stronger (and negative) correlation between the available fraction of Cd with soil N mineralization, microbial biomass N and urease activity than the total Cd level. Results showed that increasing Cd level had a significant, negative effect on all the measured soil properties. However, COMPOST addition to soils contaminated with Cd resulted in a reduction of Cd toxicity on indicators of N dynamics, most likely through decreasing its bioavailability to soil biota. In brief, the application of organic materials in Cd-contaminated soils could alleviate the unfavorable and inhibitory effects of Cd on SOIL N DYNAMICs and subsequently N availability to plant may increase.

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APA: Copy

DAYANI, LEILA, & RAIESI, FAYEZ. (2012). THE RESPONSE OF N MINERALIZATION, MICROBIAL BIOMASS N AND UREASE ACTIVITY IN CD-CONTAMINATED SOILS TO COMPOST ADDITION. JOURNAL OF AGROECOLOGY (کشاورزی بوم شناختی), 2(2), 1-15. SID. https://sid.ir/paper/254743/en

Vancouver: Copy

DAYANI LEILA, RAIESI FAYEZ. THE RESPONSE OF N MINERALIZATION, MICROBIAL BIOMASS N AND UREASE ACTIVITY IN CD-CONTAMINATED SOILS TO COMPOST ADDITION. JOURNAL OF AGROECOLOGY (کشاورزی بوم شناختی)[Internet]. 2012;2(2):1-15. Available from: https://sid.ir/paper/254743/en

IEEE: Copy

LEILA DAYANI, and FAYEZ RAIESI, “THE RESPONSE OF N MINERALIZATION, MICROBIAL BIOMASS N AND UREASE ACTIVITY IN CD-CONTAMINATED SOILS TO COMPOST ADDITION,” JOURNAL OF AGROECOLOGY (کشاورزی بوم شناختی), vol. 2, no. 2, pp. 1–15, 2012, [Online]. Available: https://sid.ir/paper/254743/en

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