Premium
Ammonification and Nitrification of N as Influenced by Soil pH and Previous N Treatments
Author(s) -
Dancer W. S.,
Peterson L. A.,
Chesters G.
Publication year - 1973
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1973.03615995003700010024x
Subject(s) - nitrification , soil ph , lime , chemistry , nitrogen cycle , zoology , soil fertility , nitrogen , agronomy , environmental chemistry , soil water , environmental science , soil science , biology , paleontology , organic chemistry
The effect of soil pH on rates of ammonification and nitrification was studied. Soil samples which ranged in pH from 4.7 to 6.6 from an established lime and N fertility experiment were used. Soil pH values in the lime plots have been relatively constant for several years. Soil pH did not affect rates of ammonification appreciably; however it had a significant effect on nitrification rates. Length of the delay period ( t ′) was increased and rate of NO 3 ‐ accumulation (Km) decreased with a decrease in soil pH. Previous field N treatments increased the length of t ′ at low pH and decreased t ′ and Km at high pH. Nitrification rates and production of NO 3 ‐ were similar for soil pH values of 5.3, 6.0, 6.3, and 6.6 with a different pattern at pH 4.7.