[Inhibitory effect of DMPP on soil nitrification as affected by soil moisture content, pH and organic matter].
A laboratory incubation test with meadow brown soil was conducted to study the inhibitory effect of 3,4-dimethylpyrazole phosphate (DMPP) on soil nitrification as affected by soil moisture content (40%, 60% and 80% of the maximum field capacity), pH (4, 7 and 10), and organic matter (retained and removal). With the decrease of soil moisture content, the degradation of DMPP in soil tended to slow down, and the oxidation of soil NH4+ was more inhibited. At pH 10, more DMPP was remained in soil, and had the greatest inhibitory effect; at pH 7 and pH 4, the DMPP was lesser remained, with a smaller inhibitory effect. The removal of organic matter prolonged the remaining time of DMPP in soil, and decreased the apparent soil nitrification rate significantly.
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. xueyanchina@163.com
Yan
Y
Xue
Zhi-Jie
ZJ
Wu
Li-Li
LL
Zhang
Ping
P
Gong
Xin-Xin
XX
Dong
Yan-Xia
YX
Nie
D064751:Ammonium Compounds / Q000737:chemistry*; D003198:Computer Simulation; D017753:Ecosystem; D005308:Fertilizers; D006863:Hydrogen-Ion Concentration; D009566:Nitrates / Q000737:chemistry; D058465:Nitrification; D009930:Organic Chemicals / Q000737:chemistry; D011720:Pyrazoles / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D014867:Water / Q000032:analysis*
C433304:3,4-dimethylpyrazole phosphate; D064751:Ammonium Compounds; D005308:Fertilizers; D009566:Nitrates; D009930:Organic Chemicals; D011720:Pyrazoles; D012987:Soil; D014867:Water