Abstract:
A pot experiment was conducted on five wheat varieties, four belonging to Triticum aestivum and one to T. turgidum, using 15N -labelled (NH4)2SO4 to study fertilizer application response, N use efficiency, influence on fertilizer N loss and interaction of fertilizer N and soil N. Fertilizer use efficiency of different varieties ranged between 44% and 55%, differences among the varieties being significant. The contribution of fertilizer N to the total plant N was 30% for all varieties with no significant difference. Uptake of soil N by different varieties was similar and about 5% of the total soil N. In the presence of fertilizer N, availability of soil N was significantly enhanced; the five varieties generally showed significant differences. Losses of fertilizer N ranged between 9% and 20%; the difference between the varieties were significant.
Page(s):
107-115
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Agricultural Research, Volume: 13, Issue: 2, Year: 1992