尿酶抑制剂氢醌在提高尿素肥效中的作用

EFFECT OF UREASE INHIBITOR HYDROQUINONE ON THE EFFICIENCY OF UREA FERTILIZER

摘要:

用棕壤进行的模拟、盆栽和田间试验的结果表明:1.氢醌对土壤脲酶活性的抑制率随其用量的增多而增大;脲酶活性得以恢复的时间随氢醌用量的减少而缩短。2.适当用量的氢醌能提高春小麦对于尿素氮的利用率和减少尿素氮的气态损失。3.将适当用量的氢醌与尿素于播种前一同施入土中,能显著地提高玉米产量并省去追施氮肥的工序。4.在施有氢醌的处理,不曾发现在土壤、小麦茎秆和籽实中有氢醌的累积。

Abstract:

Results of simulation, pot and field experiments with brown earth showed that (1) the inhibition rate of soil urease activity by hydroquinone increased with increasing application rate of the latter, and the duration necessary for the restdration of urease activity decreased with decreasing application rate of this organic compound; (2) applying proper amount of hydro-quinone increased the utilization rate of urea-N by springwheat and decreased the gaseous loss of urea-N; (3) applying proper amount of hydroquinone, and urea before sowing without ropdressing of urea in growing period markedly increased the yield of maize; and (4) in treatments of applying hydroquinone, no accumulation of this compound was found in soils, stems and grains.