Table 3: Total N uptake, bacterial N uptake, and 𝑃 x (combined of two years) in rice cv. Giza 177 as affected by nitrogen sources.

TreatmentsClay soil Loamy soil
TN in shoot (%)bacterial N uptake (mg pot−1) 𝑃 x (%)TN in shoot (%)bacterial N uptake (mg pot−1) 𝑃 x (%)

Nitrogen sources
Zero N 1.30 23 14.7 0.87 3.3 5.5
Urea1.866118.41.0913.812.5
Straw2.6611220.11.2227.517.2
Sludge2.9112521.51.5239.019.5
𝐹 test * * * * * *
LSD 5%0.2014.61.20.1811.41.85

*Significant at 𝑃 < 0 . 0 5 , ns: no significant, and 𝑃 x : the proportion of plant N derived from microbial biomass.