EFFECTS of NP fertilizer levels on growth and biochemical content
of sorghum fodder grown in calcareous soil was investigated in
two successive seasons from 2010 to 2011. This study was carried out
at Maryout Research Station-Desert Research Center, between
longitude 29°47′ and 11°18′ E and latitudes 31°00′ and 15°18′ N.
Levels of NP Fertilizer applications were 0, 80, 100, 120 kg N/fed and
0, 20, 30 and 40 kg P2O5/fed. Nitrogen was given as three split
applications, whereas P was mixed with organic manure and supplied
as a single application. The control treatment was the existing nutrient
application of just of manure and potassium, given as a single
application. However, organic fertilizer was added to all treatments at
rate 10 m3 and also potassium at rate 50 Kg KO5/fed. The results
indicated that the application of the larger amounts of N and P had a
significant effect (P<0.01) plant higher, the number of leaves, stem
diameter, fodder and dry matter yields. In addition, this treatment
increased the mineral content of soil and plant with a reduced of
hydrocyanic acid (HCN) for fodder sorghum.