Theme 04: Soil Fertility and Plant Nutrition
Description
The effects of three rates of nitrogen (N) fertilizer applied to monocultures of perennial ryegrass (Lolium perenne L.) and white clover (Trifolium repens L.), and mixed ryegrass / clover swards, grazed by dairy cows on soil mineral nitrogen levels in the top 10cm of soil were studied on a dryland pasture in south-western, Victoria, Australia. Ammonium and nitrate were monitored for 14 months. Clover monocultures had significantly greater NO3- levels, however a similar trend was not observed for NH4+ . Increasing fertilizer application rate significantly increased both NO3- and NH4+ levels under all pasture types.
Included in
Effects of Fertilizer Rates and Pasture Type on Soil Mineral Nitrogen Concentration under Dairy Pasture
The effects of three rates of nitrogen (N) fertilizer applied to monocultures of perennial ryegrass (Lolium perenne L.) and white clover (Trifolium repens L.), and mixed ryegrass / clover swards, grazed by dairy cows on soil mineral nitrogen levels in the top 10cm of soil were studied on a dryland pasture in south-western, Victoria, Australia. Ammonium and nitrate were monitored for 14 months. Clover monocultures had significantly greater NO3- levels, however a similar trend was not observed for NH4+ . Increasing fertilizer application rate significantly increased both NO3- and NH4+ levels under all pasture types.
