脲酶抑制剂氢醌对土壤尿素氮转化的影响

Effect of urease inhibitor hydroquinone on urea-N transformation in soil.

本文根据用标记和非标记尿素进行的培养试验,论述了氢醌对于尿素的水解、氨的释出和挥发、硝化和反硝化作用以及生物固持的影响。得出的结论是:氢醌的作用不仅在于延缓尿素的水解和减少随之而来的氨的挥发,更重要的,是影响了尿素水解产物进一步转化的进程,增强了尿素氮对于作物的有效持续供应和减少了它的总损失。本文认为,在脲酶抑制剂的研究中,着眼点当不仅在于它们的直接作用,而更需要涉及对尿素氮转化的一系列过程的影响。这样,才能对抑制剂的作用机理有更深入的了解,对它的作用效果有更全面的评价。

Based on incubation tests with labelled and unlabelled urea, this payer discussed the effects of hydroquinone on hydrolysis of urea, release and volatilization of ammonium, nitrification, denitrification and immobilization. It is concluded that hydroquinone not only delays the hydrolysis of urea and decreases the followed volatilization of ammonia, but more importantly, influences the process of further transformation of hydrolyzates of urea, increases the effective and sustained supply of urea-N and decreases its total loss. The authors considered that in the study of urease inhibitors, objects in mind would not only be their direct effects, but also their influences on a series of processes of urea-N transformation. Only doing these, can we have a further understanding on the mechanism of their actions and give a fuller evaluation about their effects.