Response of N transformation related soil enzyme activities to inhibitor applications

Abstract

Abstract: With an aerobic incubation test,this paper studied the response of soil urease,nitrate reductase,nitrite reductase,and hydroxylamine reductase to urease inhibitor hydroquinone (HQ) applied in combination with nitrification inhibitor encapsulated calcium carbide (HQ+ECC) or dicyandiamide (HQ+DCD). The results showed that HQ+DCD could inhibit urease activity and increase activities of nitrate reductase,nitrite reductase,and hydroxylamine reductase significantly in comparison with CK,HQ and HQ+ECC. Under the condition of our test,there existed a significant relationship between soil urease,nitrate reductase,nitrite reductase,and hydroxylamine reductase activities and soil NH₄⁺ and NO₃^- contents,NH₃ volatilization and N₂O emission rate,and regression ana-lysis indicated that there were significantly positive relationships between soil urease,nitrite reductase and hydroxylamine reductase activities.

CLC Number:

S435.62

CHEN Lijun, WU Zhijie, JIANG Yong, ZHOU Likai . Response of N transformation related soil enzyme activities to inhibitor applications[J]. Chinese Journal of Applied Ecology, 2002, (9): 1099-1103.

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