ISSN:
1573-5036
Keywords:
Lolium perenne L
;
Nitrogen uptake
;
Sheep urine-N
;
Soil mineral N
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Sheep urine was applied once in August to 1 m2 plots of a N-deficientLolium perenne-dominated sward at a rate equivalent to a single urination (48 g N m−2) at an upland site. After 17 days herbage dry matter (DM) and total N were increased 19- and 63-fold respectively compared with a control receiving water only. Soil mineral N (NH 4 + and NO 3 − ) levels in the top 20 cm were greater in urine plots until 30 days after urine application when cumulative yields of herbage DM and N were 10 and 21 times greater than those of the control. Maximum recovery of urine N by herbage was only 16% of that applied, and, although swards responded rapidly to urination there were substantial losses of N, perhaps via leaching and/or volatilisation, from the soil-plant system.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02198137
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