EFFECT OF COATING UREA WITH SOME SECONDARY METABOLISM PRODUCTS EXTRACTED FROM SOME PLANTS ON AMMONIA VOLATILIZATION IN SALINE SOILS

Al-Ansari, A.S.; N. Hoshan, M.

	EFFECT OF COATING UREA WITH SOME SECONDARY METABOLISM PRODUCTS EXTRACTED FROM SOME PLANTS ON AMMONIA VOLATILIZATION IN SALINE SOILS
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 18, Issue 1, 2013, Pages 0-0
Authors
A.S. Al-Ansari; M. N. Hoshan
Abstract
An experiment was conducted in the Soil and Water Resources Science Department /College of Agriculture /University of Basrah.The objective of this study was to examine the effect of coating urea with some secondary metabolism products extracted from some plants on volatilization of ammonia from silty loam soil of different salinity levels. Phenolic substances and volatile oils were extracted from palm fiber, eucalyptus leaves and myrtus leaves by using standard methods. Urea fertilizer was coated with above extracts at ratios: 5% on dry bssis) of Phenolic compounds and 10% of volatile oils w/w Coated urea was applied to soils at rate of 270 mgN Kg-1soil.150 grames of soil treated with coated urea or ATS (at rate of 10 %) were incubated at room temperature for 10 days. Volatilized ammonia was measured during these 10 days perioed. Results showed that coating urea with Phenolic compounds extracted from eucalyptus leaves and myrtus leaves at rate 5% and essential oil extracted from eucalyptus leaves and myrtus leaves at rate 10% significantly decreased NH3-N volatilization in comparsion with uncoated urea. The lowest NH3 volatilization was obtained at treatments of urea coated with 10%of oil myrtus leaves. NH3-N volatilization from urea coated with plant extracts were significantly lower than that of urea treated with ATS. Increasing soil salinity from 3 to 12dS.m-1 increased ammonia volatilization. However increasing salinity to 24dS.m-1 decreased volatilization drasticly.

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