Symbiotic N₂-Fixation Estimated by the ¹⁵N Tracer Technique and Growth of Pueraria phaseoloides (Roxb.) Benth. Inoculated with Bradyrhizobium Strain in Field Conditions

Table 2

N status in plants (inoculated and noninoculated Pueraria, Ipomoea) at harvest.

Treatments	Total N	Ndff	Ndfs	Ndfa	NUE
	g/m^2	%
I. Pueraria	1.818b	06.16a	56.77a	37.09	5.61b
NI. Pueraria	0.993a	07.68a	66.92a	26.24	3.68a
Ipomoea	0.784a	10.27b	89.73b	—	3.88a
Sign. Trait ()				ns

I. Pueraria = inoculated Pueraria, NI. Pueraria = noninoculated Pueraria, Sign. Trait = significant trait at 5% probability level, and ns = nonsignificant; significant at , significant at ; Ndff = nitrogen derived from fertilizer, Ndfs = nitrogen derived from soil, Ndfa = nitrogen derived from atmosphere, and NUE = fertilizer nitrogen use efficiency. One-way ANOVA was performed using CropStat ver. 7.2.
In a column, values with different letters (a, b) are statistically different at the indicated significant trait.