ISSN:
1573-5036
Keywords:
soil mineralogy
;
15N
;
clay fixed ammonium
;
fertilizer rate
;
fertilizer nitrogen recovery
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Clay fixed NH4 + can provide a significant sink for fertilizer N, as well as a source of N for plant uptake. Knowledge or soil NH4 + fixing capacity and release for crops is necessary to develop long-term fertilizer programs. Field experiments with corn (Zea mays L.) were carried out to investigate soil NH4 + fixing capacity and subsequent release as influenced by fertilizer rates using 15N in a Ste. Rosalie clay (fine, mixed, frigid, Typic Humaquept) and a Chicot sandy clay loam (fine-loamy, mixed, frigid, Typic Hapludalf). With high N rates increased NH4 + fixation occurred only in the Ste. Rosalie soil. At the end of the first growing season, fertilizer N recovery as clay fixed NH4 + for high and normal rates of fertilizer in the Ste. Rosalie soil was 17.8% and 28.7%, respectively and the recovery for the high and normal rates in the Chicot soil was 4.6 and 10.5%, respectively. Significant amounts of clay fixed NH4 +-N were released in the soil profile in the second year after 15N application on the Chicot soil. Recently clay fixed fertilizer NH4 +N was released more rapidly than that of the native fixed NH4 +, from the surface layer of the Ste. Rosalie soil. The fertilizer fixed NH4 + seems to be in a more labile N pool than the native fixed NH4 +-N in the Chicot soil.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00033946
