Effect of Some Synthetic N-regulators on Fertility of Urea

Abstract

Plants take only one third of soil-applied urea-N and rest is lost in the environment by volatilization, rapid hydrolysis, nitrification and leaching. It not only results in economic loss but also causes ground water pollution. Loss of soil-applied nitrogen can be prevented to some extent by use of nitrification regulators or inhibitors. Some <img src='http://www.niscair.res.in/jinfo/infinity.gif' border=0>,β unsaturated

carbonyl compounds and isoxazole hetrocyclics derived from them, have been used as N-regulators in the present study. The efficacy of these compounds was studied in pot culture, in moong-wheat rotation. In comparison to urea alone, at 5% of applies urea level, these chemicals increased N- uptake and N- recovery by 20-40 per cent and dry matter yield by 10-30 per cent in both the crops. The study revealed that the test regulators did not alter the physico-chemical properties of soil and helped in preserving nitrogen status of soil that helped the residual wheat

crop without build up of harmful nitrite-nitrogen.

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