. 2016 Nov 28;6(2):254. doi: 10.1007/s13205-016-0567-7

Table 4.

Effect of silver nanoparticles on Shannon bacterial diversity index of cowpea

Treatments	Total bacteria			N fixers			P solubilizers			Siderophore producers
Treatments	20 DAT	40 DAT	Mean	20 DAT	40 DAT	Mean	20 DAT	40 DAT	Mean	20 DAT	40 DAT	Mean
0 ppm	1.596^c	1.390^b	1.493^b	0.065^b	0.060^b	0.062^a	0.071^a	0.060^a	0.065^a	0.00004^a	0.00013^a	0.00008^a
50 ppm	1.606^c	1.398^b	1.502^b	0.066^b	0.055^b	0.061^a	0.063^a	0.055^a	0.059^a	0.00004^a	0.00473^b	0.00238^b
75 ppm	1.602^c	1.310^a	1.456^a	0.062^b	0.019^a	0.041^a	0.080^a	0.073^a	0.077^a	0.00002^a	0.00001^a	0.00002^a
Mean	1.601^b	1.366^a		0.065^b	0.045^a		0.071^a	0.063^a		0.00003^a	0.00162^b
	cd at 5%			cd at 5%			cd at 5%			cd at 5%
Time interval (T)	0.023			0.018			0.017			0.0014
Concentration (C)	0.028			0.022			0.021			0.0017
T × C	0.039			0.031			0.029			0.0024

Values are the means of three replicates

Means sharing different alphabets “a”–“c” differ significantly from each other at p < 0.05