Potential of three microbial bio-effectors to promote maize growth and nutrient acquisition from alternative phosphorous fertilizers in contrasting soils

Chemical and Biological Technologies in Agriculture

Table 5 Relative fertilizer efficiencies (FE) and P use efficiencies (PUE)

P fertilizer	Abbr.	1-Buus (Switzerland)		2-Castel Volturno (Italy)		3-Humpolec (Czech R.)		4-Lukavec (Czech R.)		5-Vörden (Germany)		6-Taastrup (Denmark)
		FE	PUE	FE	PUE	FE	PUE	FE	PUE	FE	PUE	FE	PUE
		(% of TSP)	(% of TSP)	(% of TSP)	(% of TSP)	(% of TSP)	(% of TSP)	(% of TSP)	(% of TSP)	(% of TSP)	(% of TSP)	(% of TSP)	(% of TSP)
Negative control	P0	0bc	0c	0d	0d	0a	0a	0b	0b	0d	0c	0c	n.a.
Triple super phosphate	TSP	100a	100a	100a	100a	100a	100a	100a	100a	100a	100ab	100a	n.a.
Rock phosphate	RP	−28c	−27c	79b	81ab	−70.1a	7a	30b	28b	6cd	11 c	n.a.	n.a.
Fresh digestate	FrDi	76a	74ab	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.
Composts	Comp-CH, Comp-DE	54ab	48b	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	55b	84 ab	n.a.	n.a.
Composted cow manure	C-MComp	n.a.	n.a.	28c	60bc	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.
Composted horse manure	H-MComp	n.a.	n.a.	2d	21cd	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.
Sewage sludges	SS-DE, SS-DK	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	16cd	21c	49b	n.a.
Sewage sludge ashes	SSA-DE, SSA-DK	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	20cd	22c	45b	n.a.
P-enriched BOF slag	LSD/SSA	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.	95 a	59b	n.a.	n.a.

The efficiencies are calculated for the BE0 treatments only. Efficiencies are calculated relative to TSP as the positive control (see “Methods” section for details). For each column, different letters after mean values represent significantly different means (Tukey’s test, P < 0.05)
n.a. means not applicable