Short-Term Effects of Biogas Digestates and Pig Slurry Application on Soil Microbial Activity

Table 4

Amount of dry matter (DM), heavy metals, and nutrients added at an amendment rate corresponding to 70 kg -N ha⁻¹ with the four types of biogas digestates (BD-A, BD-B, BD-C, and BD-D) and pig slurry (PS).

Parameter	BD-A	BD-B	BD-C	BD-D	PS
DM (kg ha^−1)	854	632	425	1180	2650
Tot-C (kg ha^−1)	266	154	175	480	1170
Tot-N (kg ha^−1)	106	109	85	110	155
Org-N (kg ha^−1)	36	38	15	40	85
-N (kg ha^−1)	70	70	70	70	70
Cr (g ha^−1)	182	254	277.5	390	312
Mn (g ha^−1)	2810	4540	2300	5730	12400
Ni (g ha^−1)	543	606	42.5	34	1160
Cu (g ha^−1)	976	1190	995	1950	6360
Zn (g ha^−1)	6640	7940	7480	7910	23400
Cd (g ha^−1)	4.2	5.1	30	6.0	8.8
Pb (g ha^−1)	1.4	12.0	115	68	2.9
Hg (g ha^−1)	1.4	1.7	2.5	2.0	2.9