Table 2: Ammonium concentration, nitrogen uptake, and SDW (combined of two years) of rice cv. Giza 177 as affected by nitrogen sources and microbial biomass.

TreatmentsClay soil Loamy soil
TN in soil (%)NH4 (mg kg−1)N uptake (mg pot−1)SDW (g pot−1)TN in soil (%)NH4 (mg kg−1)N uptake (mg pot−1)SDW (g pot−1)

Nitrogen sources
Zero N0.2514.3116010.790.1011.25603.91
Urea0.4121.4443021.830.1915.451109.43
Straw0.4223.9358021.150.2119.5016011.10
Sludge0.4322.7760021.550.2218.7222012.94
𝐹 test * * * * * * * *
LSD 5%0.020.8026.40.720.031.7533.53.14
Microbial biomass
Autoclaved soil0.3920.8832416.070.2116.85847.06
Fresh soil0.4320.2556519.520.4518.051437.62
𝐹 test * * * * * * * *
LSD 5%0.040.2231.30.750.2818.10.26

*Significant at 𝑃 0 . 0 5 , ns: not significant, and SDW: shoot dry weight of rice.